Common Issues with the Jaguar XJR: A Comprehensive Guide

By Brian Wong, Reviewed by: Kurt Niebuhr, Updated on April 16, 2024

1. Introduction

1.1 Brief overview of the Jaguar XJR

The Jaguar XJR is a luxury performance car that has been produced in various models and year ranges. It is known for its sleek design, powerful engine, and advanced features. The XJR has been a popular choice for those who value performance and style in a car.

The XJR was first introduced in 1997 as part of the X308 generation. This model featured a 4.0-liter supercharged V8 engine with 370 horsepower. The XJR was praised for its smooth ride, precise handling, and impressive acceleration. It was a popular choice for those who wanted a luxury sedan that could also deliver high performance.

In 2003, the XJR was updated with the introduction of the X350 generation. This model featured a 4.2-liter supercharged V8 engine with 390 horsepower. The X350 generation also introduced a number of new features, including adaptive cruise control, parking sensors, and a touchscreen navigation system. The XJR continued to be a popular choice for those who wanted a luxury car that could also deliver a thrilling driving experience.

In 2013, the XJR was updated again with the introduction of the X351 generation. This model featured a 5.0-liter supercharged V8 engine with 550 horsepower (and later updated to 575 horsepower). The X351 generation also introduced a number of new features, including a panoramic sunroof, a 17-speaker Meridian sound system, and adaptive LED headlights. The XJR continued to be praised for its combination of luxury and performance.

Throughout its various models and year ranges, the Jaguar XJR has been known for its powerful engines, responsive handling, and advanced features. However, like any car, the XJR is not without its issues. Common issues include electrical problems, suspension issues, and engine problems. Proper maintenance and diagnosis are key to keeping the XJR running smoothly and addressing any issues that arise.

1.2 Importance of diagnosing and fixing car issues

Diagnosing and fixing car issues is an important part of owning and maintaining a Jaguar XJR. Whether it's a minor issue like a broken light or a more serious problem like engine failure, addressing issues in a timely manner can save you time, money, and prevent further damage to your car.

One of the key benefits of diagnosing car issues is that it allows you to identify the problem early on. This can prevent the problem from escalating and causing further damage to your car. For example, if you notice that your engine is running hot, you can take your car in for a diagnosis and get it fixed before it causes damage to other parts of the engine.

In addition to preventing further damage, diagnosing and fixing car issues can also save you money in the long run. Ignoring a problem can lead to more expensive repairs down the line. For example, if you ignore a minor oil leak, it can lead to engine failure and a costly repair bill.

Another important reason to diagnose and fix car issues is safety. If your car has a faulty brake system or suspension issues, it can be dangerous to drive. Addressing these issues promptly can prevent accidents and ensure that you and your passengers are safe while driving.

When it comes to the Jaguar XJR, there are a number of common issues that owners may encounter. These include electrical problems, suspension issues, and engine problems. By diagnosing and fixing these issues early on, you can ensure that your XJR continues to deliver the performance, style, and luxury that it's known for.

1.3 Scope of the article

The Jaguar XJR is a high-performance luxury car that has been praised for its sleek design, powerful engine, and advanced features. While the XJR is known for its exceptional performance, like any car, it may encounter issues that require maintenance and repair.

The scope of this article is to provide an overview of the common issues that Jaguar XJR owners may encounter and the importance of diagnosing and fixing car issues promptly. The article will cover the XJR's various models, year ranges, generations, and types of engines, as well as the common issues associated with each.

The article will also discuss the importance of proper maintenance and care for the XJR, including regular oil changes, tire rotations, and brake inspections. Additionally, the article will provide tips on how to identify potential issues with your XJR and the steps you should take to address them.

It's important to note that while the XJR is a high-performance luxury car, it is not immune to issues. Ignoring issues or neglecting regular maintenance can lead to costly repairs and potential safety hazards. By understanding the common issues associated with the XJR and the importance of diagnosing and fixing car issues promptly, you can ensure that your XJR continues to deliver the exceptional performance, style, and luxury that it's known for.

2. Common issues by year range and model

2.1 Jaguar XJR (X308) (1997-2003)

2.1.1 Electrical issues

The Jaguar XJR (X308) produced between 1997-2003 is a popular model of the XJR that has encountered various electrical issues over the years. These issues can range from minor annoyances to serious safety hazards.

One of the most common electrical issues that XJR owners encounter is related to the car's battery and alternator. The battery can drain quickly if the alternator is not charging properly, leading to a car that won't start. This issue can be resolved by having the alternator tested and replaced if necessary.

Another common electrical issue with the XJR (X308) is related to the car's audio system. Some owners report issues with the audio system randomly turning on and off or the sound quality being poor. This issue can often be fixed by replacing the audio system's amplifier.

The XJR (X308) has also been known to have problems with its power windows. Some owners report that the windows become stuck in the open position, making it impossible to close them. This issue is typically caused by a faulty window regulator, which can be replaced to fix the problem.

Finally, the XJR (X308) has been known to experience issues with its dashboard lights. Some owners report that the lights intermittently turn on and off, making it difficult to see important information while driving. This issue can be caused by a faulty dashboard bulb or a malfunctioning instrument cluster, which can be replaced to resolve the issue.

2.1.2 Suspension issues

The Jaguar XJR (X308) produced between 1997-2003 is a high-performance luxury sedan that offers a comfortable ride and excellent handling. However, like any car, it is not immune to issues, particularly with its suspension system.

One of the most common suspension issues with the XJR (X308) is related to its air suspension system. Some owners have reported that the suspension system fails to maintain proper ride height, leading to a harsh ride or bottoming out on bumps in the road. This issue can be resolved by replacing the air suspension compressor or other components of the system, such as the air springs or control module.

Another common suspension issue with the XJR (X308) is related to its front suspension bushings. Some owners report that the front suspension bushings wear out quickly, leading to a clunking or banging noise when driving over bumps. This issue can be resolved by replacing the front suspension bushings with upgraded polyurethane bushings.

The XJR (X308) has also been known to experience issues with its rear shock absorbers. Some owners report that the rear shocks leak or fail prematurely, leading to a harsh ride or poor handling. This issue can be resolved by replacing the rear shock absorbers with upgraded units.

Finally, some XJR (X308) owners have reported issues with their steering system. The steering may feel loose or vague, or the car may wander on the road. This issue can be caused by worn steering components, such as the tie rod ends or ball joints, and can be resolved by replacing these components.

2.1.3 Engine issues

The Jaguar XJR (X308) produced between 1997-2003 is a powerful and high-performance luxury sedan that is equipped with a supercharged V8 engine. While the engine is known for its impressive performance, it is not immune to issues, particularly with the early models.

One of the most common engine issues with the XJR (X308) is related to its cooling system. Some owners have reported that the engine overheats, particularly during heavy use or in hot weather conditions. This issue can be caused by a faulty thermostat, a failed water pump, or a clogged radiator, and can lead to engine damage if not addressed promptly. Regular maintenance of the cooling system, including flushing and replacing the coolant and replacing the water pump and thermostat as needed, can prevent this issue from occurring.

Another common engine issue with the XJR (X308) is related to its timing chain tensioners. Some owners report that the timing chain tensioners fail, causing a rattling noise from the engine or even engine failure in severe cases. This issue can be resolved by replacing the timing chain tensioners with upgraded units.

The XJR (X308) has also been known to experience issues with its supercharger. Some owners report that the supercharger fails, causing a loss of power and poor performance. This issue can be resolved by replacing the supercharger unit.

Finally, some XJR (X308) owners have reported issues with their engine misfiring or running rough. This issue can be caused by a variety of factors, including faulty spark plugs, clogged fuel injectors, or a malfunctioning engine control module. Regular maintenance and tuning of the engine can help prevent this issue from occurring.

2.2 Jaguar XJR (X350) (2003-2009)

2.2.1 Transmission issues

The Jaguar XJR (X350) produced between 2003-2009 is a luxury sedan that boasts impressive performance and handling, thanks in part to its six-speed automatic transmission. However, the XJR (X350) is not immune to transmission issues, particularly with the early models.

One of the most common transmission issues with the XJR (X350) is related to its torque converter. Some owners have reported that the torque converter fails, causing the transmission to slip or fail to engage properly. This issue can be resolved by replacing the torque converter with an upgraded unit.

Another common transmission issue with the XJR (X350) is related to its transmission control module. Some owners have reported that the transmission control module fails, causing the transmission to shift erratically or fail to shift at all. This issue can be resolved by replacing the transmission control module with an upgraded unit.

The XJR (X350) has also been known to experience issues with its transmission valve body. Some owners report that the valve body fails, causing the transmission to shift harshly or fail to shift properly. This issue can be resolved by replacing the valve body with an upgraded unit.

Finally, some XJR (X350) owners have reported issues with their transmission slipping or shifting erratically. This issue can be caused by a variety of factors, including low transmission fluid levels, a malfunctioning transmission solenoid, or a failing transmission pump. Regular maintenance of the transmission, including fluid changes and inspections, can help prevent this issue from occurring.

2.2.2 Electrical issues

The Jaguar XJR (X350) was produced between 2003 and 2009 and had its share of electrical issues. One of the most common problems with this model was related to the air suspension system. The air suspension system uses an air compressor to inflate airbags that support the vehicle's weight. Electrical issues with the air compressor can cause the suspension to malfunction, resulting in an uncomfortable ride or even unsafe driving conditions.

Another common electrical issue with the XJR (X350) was related to the car's cooling fan. The cooling fan helps to regulate the engine's temperature, and if it fails, the engine may overheat. Some owners reported that the cooling fan would continue to run even when the car was turned off, which could drain the battery.

In addition, the XJR (X350) also experienced issues with its electrical system that could cause warning lights to appear on the dashboard. Some owners reported that the car's battery would drain rapidly, even when the car was not in use, and others experienced problems with the car's audio system, including the radio and speakers.

Diagnosing electrical issues with the XJR (X350) can be challenging and often requires specialized diagnostic tools. It's important to have these issues addressed promptly by a trained professional to prevent further damage to the car's electrical system and ensure the safety of the vehicle and its occupants.

2.2.3 Suspension issues

Jaguar XJR (X350) models from 2003 to 2009 are known for their sleek design and luxurious features. However, they are also known for experiencing some common suspension issues. One of the most prevalent issues is the failure of the air suspension system. The air suspension is responsible for providing a smooth ride and compensating for changes in the road surface. If the air suspension fails, the ride becomes bumpy and uncomfortable. Some drivers report hearing unusual noises or feeling a vibration in the steering wheel when the air suspension is failing.

Another common issue with the suspension system on the XJR (X350) is the failure of the front suspension arm bushes. These bushes are responsible for maintaining the alignment of the wheels and the suspension system. If they fail, the wheels can become misaligned, causing uneven tire wear and difficulty steering.

Other suspension issues reported in the XJR (X350) include failure of the ball joints, which can cause a clunking noise while driving, and failure of the shock absorbers, which can cause a bouncy or unstable ride.

Regular maintenance and inspections can help identify and prevent suspension issues. Drivers should pay attention to any unusual noises or vibrations and have them checked by a qualified mechanic. It's important to replace worn suspension components as soon as possible to ensure a safe and comfortable driving experience.

2.3 Jaguar XJR (X351) (2013-2019)

2.3.1 Fuel system issues

The Jaguar XJR (X351) is a luxury sedan that was produced between 2013 and 2019. While it is known for its impressive performance and stylish design, some owners have reported issues with the fuel system.

One common problem with the fuel system in the XJR is a fuel leak. This can be caused by a faulty fuel line or a cracked fuel tank, and can lead to a dangerous situation if not addressed promptly. Another issue reported by some owners is a failure of the fuel pump, which can cause the car to stall or not start at all.

In addition to these specific problems, some XJR owners have reported more general issues with the fuel system, such as poor fuel economy and a loss of power. These issues may be caused by a variety of factors, including a clogged fuel filter or a malfunctioning fuel pressure regulator.

To diagnose and fix fuel system issues in the Jaguar XJR, it is important to have a thorough understanding of the car's components and systems. A certified mechanic can perform a fuel system inspection, which may involve checking for leaks, testing the fuel pressure, and inspecting the fuel injectors. Depending on the specific issue, repairs may involve replacing faulty components or simply cleaning and adjusting certain parts. Regular maintenance, such as changing the fuel filter and using high-quality fuel, can also help prevent fuel system issues from occurring.

2.3.2 Electrical issues

The Jaguar XJR (X351) produced between 2013 and 2019 is known for its luxurious design, powerful engine, and advanced features. However, like any other car, it may experience certain electrical issues over time. Some of the common electrical issues reported by owners of the Jaguar XJR (X351) include problems with the infotainment system, battery drain, and faulty electrical connections.

One of the most common electrical issues reported in the Jaguar XJR (X351) is related to the infotainment system. Owners have reported issues with the touchscreen display freezing or becoming unresponsive, as well as problems with Bluetooth connectivity and the navigation system. In some cases, the entire infotainment system may need to be replaced to resolve these issues.

Another common issue with the Jaguar XJR (X351) is battery drain. This can be caused by a number of factors, including faulty electrical components, a failing alternator, or leaving the car parked for long periods of time without starting it. If you notice that your battery is frequently draining or that the car won't start, it's important to have it inspected by a qualified mechanic.

Finally, faulty electrical connections can also cause issues in the Jaguar XJR (X351). Loose or corroded connections can result in problems with the car's sensors, lighting, and other electrical components. These issues can typically be resolved by cleaning or tightening the affected connections or replacing damaged components.

Overall, while the Jaguar XJR (X351) is a well-designed and high-performance car, it may experience certain electrical issues over time. By staying aware of these common issues and taking care to have them addressed promptly, you can help ensure that your Jaguar XJR (X351) remains in top condition for years to come.

2.3.3 Suspension issues

The Jaguar XJR (X351) produced between 2013 and 2019 is a high-performance luxury sedan known for its powerful engine, agile handling, and smooth ride. However, some common suspension issues have been reported by owners and mechanics.

One common problem with the XJR's suspension system is related to the air suspension. The air suspension can sometimes fail due to leaks or other issues, resulting in a bumpy or unstable ride. This can also cause the vehicle to lower itself while parked, making it difficult to drive without causing further damage.

Another issue with the suspension system is related to the bushings and ball joints. These components can wear out over time, causing clunking or knocking noises while driving, and even affecting the vehicle's steering and handling.

Lastly, some XJR owners have reported issues with the suspension alignment, which can cause uneven tire wear, poor handling, and a rough ride. Alignment issues can be caused by worn or damaged suspension components, as well as poor installation or adjustment.

To prevent these suspension issues, it's important to maintain regular inspections and maintenance of the suspension system, including checking for leaks, replacing worn components, and ensuring proper alignment. Additionally, driving carefully on rough roads and avoiding overloading the vehicle can help to reduce the risk of suspension problems. If you do experience any issues with your XJR's suspension system, it's important to have it diagnosed and repaired by a qualified mechanic to ensure proper functioning and safety.

3. Common issues by engine type

3.1 AJ26S engine (1997-2002)

3.1.1 Oil leaks

The Jaguar XJR (X308) model, produced from 1997 to 2002, is equipped with the AJ26S engine. One of the most common issues with this engine is oil leaks. These leaks can be caused by a variety of factors, including worn or damaged gaskets, seals, and O-rings.

One area where oil leaks frequently occur is the valve cover gaskets. Over time, the gaskets can become brittle and cracked, allowing oil to seep out. This can lead to engine damage if not addressed promptly.

Another area where oil leaks can occur is the rear main seal. This seal is responsible for keeping oil from leaking out of the back of the engine. If it becomes worn or damaged, oil can start to leak out, leading to a loss of oil pressure and potentially serious engine damage.

It is important to have any oil leaks in the AJ26S engine diagnosed and repaired as soon as possible to prevent further damage. Regular maintenance, including checking for leaks and replacing worn gaskets and seals, can help prevent oil leaks from occurring in the first place.

In addition, it is important to use high-quality engine oil that is designed for use in the AJ26S engine. Using the wrong type of oil or oil that is not up to the proper standards can increase the risk of oil leaks and other engine problems. Regular oil changes can also help keep the engine running smoothly and reduce the risk of oil leaks.

3.1.2 Misfires

The AJ26S engine, which was used in the Jaguar XJR from 1997 to 2002, is known to experience misfires. This issue can be caused by a variety of factors, including faulty spark plugs, ignition coils, or fuel injectors. In some cases, a vacuum leak or a malfunctioning sensor may also be to blame.

Misfires can lead to a number of problems, including decreased performance, rough idling, and even engine damage if left unaddressed for an extended period of time. To diagnose and fix this issue, it's important to have the car properly inspected by a qualified mechanic who can perform a thorough diagnosis and recommend the appropriate repairs. Depending on the cause of the misfire, potential solutions may include replacing faulty components, cleaning or repairing sensors, or addressing vacuum leaks.

Regular maintenance and inspections can help prevent misfires and other engine issues from occurring. Keeping up with recommended service intervals and promptly addressing any warning signs can help ensure that your Jaguar XJR runs smoothly and reliably.

3.1.3 Timing chain tensioner failure

The Jaguar XJR with the AJ26S engine (1997-2002) has a common issue with the timing chain tensioner. The timing chain tensioner is responsible for keeping the timing chain in the correct position and tension. Over time, the tensioner can become worn and lose its ability to maintain the correct tension on the timing chain, leading to a chain that is loose and can jump or skip teeth.

When the timing chain tensioner fails, it can cause serious engine damage, including bent valves and damaged pistons. Signs of a failing timing chain tensioner include engine noise, misfires, and poor performance. If you notice any of these symptoms, it is essential to have your Jaguar XJR inspected by a professional mechanic.

To avoid timing chain tensioner failure, it is essential to keep up with regular maintenance and have the timing chain and tensioner inspected periodically. If the tensioner is showing signs of wear, it should be replaced immediately to prevent serious engine damage.

3.2 AJ27S engine (2002-2003)

3.2.1 Supercharger failure

The Jaguar XJR is equipped with a supercharged engine, and one of the most common issues by engine type AJ27S engine (2002-2003) is supercharger failure. The supercharger is responsible for compressing the air that goes into the engine, increasing power output. However, over time, the supercharger can fail due to various reasons such as worn bearings, damaged gears, or issues with the intercooler.

If the supercharger fails, it can cause a decrease in engine power and overall performance. Additionally, it can result in other problems such as misfires, rough idle, and increased fuel consumption. In some cases, the supercharger can seize up entirely, leading to significant engine damage.

To prevent supercharger failure, it is important to perform regular maintenance on the vehicle, including checking the oil levels and changing the oil regularly. It is also crucial to have any issues with the supercharger addressed promptly by a qualified mechanic.

In some cases, supercharger failure may require a replacement of the entire unit, which can be a costly repair. It is recommended to address any issues with the supercharger as soon as possible to avoid further damage to the engine and keep the vehicle running smoothly.

3.2.2 Timing chain tensioner failure

The Jaguar XJR (X350) produced between 2002 and 2003 is equipped with an AJ27S engine. One of the common issues with this engine is timing chain tensioner failure. The timing chain tensioner is responsible for maintaining the proper tension in the timing chain, which ensures that the engine's valves and pistons move in sync with each other. If the timing chain tensioner fails, it can cause the timing chain to become loose or slip, leading to engine misfires, reduced performance, or even catastrophic engine failure.

One of the signs of timing chain tensioner failure is a rattling noise coming from the engine's front. The noise may be more pronounced when the engine is cold or during acceleration. In some cases, the Check Engine Light may also illuminate on the dashboard. If left unchecked, timing chain tensioner failure can cause severe engine damage and lead to costly repairs.

To prevent timing chain tensioner failure, it is recommended to follow the manufacturer's recommended maintenance schedule, which includes regular inspection and replacement of the timing chain tensioner. Additionally, using high-quality oil and changing it at regular intervals can help keep the timing chain tensioner and other engine components lubricated and working properly.

If you suspect that your Jaguar XJR (X350) is experiencing timing chain tensioner failure, it is essential to bring it to a qualified mechanic as soon as possible for diagnosis and repair.

3.2.3 Throttle body issues

The Jaguar XJR with AJ27S engine (2002-2003) has had some common issues related to its throttle body. The throttle body is responsible for regulating the amount of air that flows into the engine. One common issue with the throttle body on this model is the buildup of carbon deposits, which can cause it to malfunction. This can lead to rough idling or stalling, and reduced acceleration.

Another issue with the throttle body is the failure of the electronic throttle control module. This module is responsible for sending signals to the throttle body to adjust the air and fuel mixture, and if it fails, the engine may not start or may run poorly. In some cases, the electronic throttle control module can be repaired, but in others, it may need to be replaced entirely.

Additionally, the throttle position sensor on this engine type can also cause problems. The sensor is responsible for sending signals to the engine control module to adjust the fuel and air mixture. If the sensor is faulty, the engine may run poorly or not start at all. Replacing the throttle position sensor is often the solution to this issue.

It is important to regularly maintain the throttle body and its components to prevent these issues from occurring. This includes cleaning the throttle body and replacing the air filter, as well as checking and replacing any worn or faulty components. Regular maintenance and addressing issues promptly can help ensure the longevity and optimal performance of the Jaguar XJR with AJ27S engine.

3.3 AJ34S engine (2003-2009)

3.3.1 Transmission issues

The Jaguar XJR (X350) models manufactured between 2003 and 2009 were equipped with the AJ34S engine. While these engines are generally considered to be reliable, there have been some reported transmission issues.

One of the most common problems with the XJR's transmission is the failure of the solenoid pack, which can cause harsh shifting, slipping, or even complete failure of the transmission. This issue is more commonly seen in the earlier models and can be costly to repair or replace.

Another issue that some XJR owners have reported is the transmission slipping out of gear or failing to shift properly. This can be caused by a faulty valve body, which may need to be replaced.

In addition to these issues, some XJR owners have reported problems with the transmission cooler lines leaking, which can lead to a loss of transmission fluid and potentially serious damage to the transmission. This issue can often be resolved by replacing the affected lines.

Overall, while the AJ34S engine is generally considered to be reliable, XJR owners should be aware of these potential transmission issues and ensure that regular maintenance and inspections are carried out to catch any problems early on.

3.3.2 Fuel system issues

The Jaguar XJR with the AJ34S engine (2003-2009) may experience some common fuel system issues that owners should be aware of. One of the main issues is related to the fuel pump, which may fail prematurely and cause the engine to stall or not start at all. This can be a serious issue if it occurs while driving, as it could potentially lead to an accident.

Another fuel system issue that is common with the AJ34S engine is related to the fuel injectors. Over time, the fuel injectors may become clogged or dirty, which can cause the engine to run poorly and even misfire. In some cases, the fuel injectors may need to be replaced to resolve this issue.

Fuel filters can also become clogged with debris, reducing fuel flow and causing the engine to run poorly. Regularly replacing the fuel filter can help prevent this issue from occurring.

Lastly, the fuel pressure regulator can sometimes fail, causing the engine to experience low fuel pressure. This can result in poor performance and fuel economy. Replacing the fuel pressure regulator is the best solution to resolve this issue.

3.3.3 Electrical issues

The Jaguar XJR, with the AJ34S engine, has also been known to have its fair share of electrical issues. One of the most common issues has been with the car's alternator. The alternator can sometimes fail prematurely, causing the battery to die and the car to stall. This problem has been reported in several model years.

Another electrical issue that has been reported in the XJR is related to the car's electronic control module (ECM). The ECM is responsible for controlling various aspects of the car's engine and transmission. However, in some cases, the ECM can malfunction, causing the engine to run poorly, or even causing the car to stall. This issue has been reported in several model years, and some owners have reported having to replace the ECM multiple times.

The XJR has also been known to have issues with its wiring harness. The wiring harness is responsible for carrying electrical signals throughout the car's various systems. Over time, the wiring harness can become damaged, causing electrical problems such as shorts, open circuits, and intermittent failures. This issue has been reported in several model years.

Finally, the XJR has been known to have problems with its battery. The battery can sometimes fail prematurely, causing the car to stall or not start. This issue has been reported in several model years, and some owners have reported having to replace the battery multiple times.

Overall, while the XJR is a high-performance luxury vehicle, it has had its fair share of electrical issues. Owners should be aware of these issues and should be prepared to address them as needed to keep their cars running smoothly.

3.4 AJ133 engine (2008-2019)

3.4.1 Supercharger failure

The Jaguar XJR with the AJ133 engine (2008-2019) is known for its supercharger issues. The supercharger in this engine is prone to failure due to wear and tear over time. The bearings in the supercharger can wear out and cause the supercharger to fail, leading to reduced engine performance and potential engine damage.

Another issue related to the supercharger is the failure of the intercooler pump. The intercooler pump is responsible for cooling the air entering the engine, and a failure can lead to reduced engine performance and potential engine damage.

To prevent supercharger failure, it is important to ensure regular maintenance of the vehicle, including changing the oil and checking the condition of the supercharger components. Additionally, upgrading to a high-performance supercharger can help improve engine performance and reduce the likelihood of supercharger failure.

Overall, while the supercharger issues with the AJ133 engine in the Jaguar XJR are a concern for some owners, regular maintenance and preventative measures can help mitigate these issues and ensure the longevity and reliability of the vehicle.

3.4.2 Engine oil leaks

The AJ133 engine used in the Jaguar XJR (X351) from 2008 to 2019 is known for engine oil leaks. One of the common areas where oil leaks occur is from the timing cover gaskets. These gaskets can wear over time and cause oil to seep out. Another area where leaks can occur is from the valve cover gaskets. These gaskets can also wear out and cause oil to leak onto the exhaust manifold, leading to a burning smell and smoke coming from the engine. The rear main seal is another area where oil leaks can occur, and if not addressed promptly, can lead to serious engine damage.

In addition to the above, the oil pan gasket and oil cooler lines are also potential sources of oil leaks. The oil pan gasket can deteriorate over time, leading to oil seepage, while the oil cooler lines can develop leaks due to wear or damage.

Oil leaks not only create a mess and unpleasant smell but can also cause serious engine damage if left untreated. It is important to regularly check for any signs of oil leaks and have them addressed promptly by a qualified mechanic to prevent any further damage to the engine.

3.4.3 Camshaft wear

The Jaguar XJR equipped with the AJ133 engine, which was produced from 2008 to 2019, has been known to experience issues with camshaft wear. The AJ133 engine is a supercharged 5.0-liter V8 that delivers impressive power and performance, but over time, the camshafts can develop excessive wear, leading to a range of problems.

Camshaft wear can occur due to a number of reasons, including inadequate lubrication, incorrect installation, and low-quality engine oil. Symptoms of camshaft wear may include rough engine idle, loss of power, and engine misfires. In severe cases, the engine may fail to start altogether.

To prevent camshaft wear and related issues, it is important to ensure that the engine is maintained according to the manufacturer's recommended service schedule. This includes regular oil changes with high-quality synthetic oil and proper installation of components during maintenance and repairs.

If camshaft wear is suspected, it is important to have the engine inspected by a qualified technician who can diagnose the issue and recommend appropriate repairs. In some cases, camshaft replacement may be necessary to restore proper engine function and prevent further damage.

4. Common issues by trim level or configuration

4.1 XJR Portfolio Plus

4.1.1 Suspension issues

The Jaguar XJR Portfolio Plus, a high-end trim level of the XJR, has a few common suspension issues that owners may encounter. One of the most frequent problems is with the air suspension system, which can fail and cause the car to sag or bounce excessively. This can be caused by leaks in the air suspension lines or by a malfunctioning compressor.

Another issue that XJR Portfolio Plus owners may encounter is with the shock absorbers. Over time, the shock absorbers can wear out and fail, causing a rough ride and reduced handling performance. This can be particularly noticeable when driving over rough roads or uneven surfaces.

Finally, the XJR Portfolio Plus can be prone to issues with the front suspension arms. These components can wear out over time, causing a knocking or clunking noise when driving over bumps or during turns. In some cases, the arms may need to be replaced to resolve the issue.

Regular maintenance and inspection of the suspension system can help prevent these issues from occurring or catch them early before they become more significant problems. It is recommended to have the suspension system checked by a professional if any unusual symptoms are noticed, such as excessive bouncing or rough ride.

4.1.2 Electrical issues

The Jaguar XJR Portfolio Plus, like many luxury vehicles, is equipped with a plethora of electrical features designed to enhance the driving experience. However, some XJR Portfolio Plus owners have reported electrical issues that can cause frustration and inconvenience.

One common electrical issue reported by XJR Portfolio Plus owners is a faulty keyless entry system. This system allows the owner to enter and start the vehicle without using a key. However, some owners have reported that their keyless entry system does not work, forcing them to use a physical key to enter the car. This issue is often caused by a faulty key fob or receiver.

Another electrical issue reported by XJR Portfolio Plus owners is a malfunctioning infotainment system. This system includes the car's audio, navigation, and climate control features. Some owners have reported that the system freezes or crashes, causing the car's audio or climate control to stop working. This issue can be caused by a faulty software update or a malfunctioning component within the system.

Finally, some XJR Portfolio Plus owners have reported issues with their car's electrical wiring. These issues can cause various electrical features to stop working or malfunction, such as the power windows, door locks, or interior lighting. Wiring issues are often caused by damaged wires or connections, which can be difficult to locate and repair.

Overall, while electrical issues can be frustrating for XJR Portfolio Plus owners, they can often be resolved by replacing faulty components or repairing damaged wiring. It is recommended that owners consult with a certified Jaguar mechanic to diagnose and repair any electrical issues.

4.1.3 Fuel system issues

The Jaguar XJR Portfolio Plus is known for its powerful engine and luxurious features, but like any other vehicle, it can experience issues with its fuel system. One common problem is related to the fuel pump, which can fail and cause the engine to stall or not start at all. This issue may be accompanied by a buzzing or whining noise coming from the fuel tank.

Another issue that XJR Portfolio Plus owners may encounter is fuel injector failure. The fuel injectors can become clogged or fail, leading to poor fuel economy, reduced engine performance, and rough idling. Symptoms of this issue can include engine misfires, hesitation during acceleration, and a noticeable decrease in power.

In addition to these problems, the XJR Portfolio Plus may also suffer from fuel leaks. Leaks can occur in the fuel lines, fuel tank, or fuel injectors, and can pose a serious safety hazard. Signs of a fuel leak include a strong gasoline odor, visible puddles of fuel under the vehicle, and a drop in fuel efficiency.

It's important for XJR Portfolio Plus owners to address fuel system issues promptly to avoid further damage to the vehicle or potential safety hazards. Regular maintenance and inspections can help prevent these issues from occurring, and if any symptoms are noticed, it's recommended to bring the vehicle to a trusted mechanic for diagnosis and repair.

4.2 XJR575

4.2.1 Transmission issues

The Jaguar XJR575 is a high-performance variant of the XJR with a more powerful engine and sport-tuned suspension. While this trim level offers impressive performance, it is not immune to some common transmission issues.

One issue that XJR575 owners may experience is transmission fluid leaks. This can occur due to worn seals or gaskets, which can cause fluid to leak out of the transmission and onto the ground. If this issue is not addressed promptly, it can lead to more serious transmission problems and costly repairs.

Another common transmission issue is rough shifting or slipping gears. This can occur due to worn or damaged clutch plates, worn or damaged gears, or issues with the transmission control module. In some cases, a simple software update may be enough to resolve the issue, but more serious cases may require transmission repair or replacement.

It is important for XJR575 owners to keep up with regular transmission maintenance, such as fluid changes and filter replacements, to prevent these issues from occurring. Additionally, if any transmission issues are noticed, it is best to have them addressed promptly by a qualified mechanic to avoid further damage to the transmission.

4.2.2 Engine issues

The Jaguar XJR575 is a high-performance version of the XJR that features a 5.0-liter supercharged V8 engine producing 575 horsepower. Despite its powerful engine, there have been some common engine issues reported by owners of the XJR575.

One of the most reported engine issues is related to the engine cooling system. Some XJR575 owners have reported overheating issues, which can be caused by a malfunctioning water pump, thermostat, or radiator. This issue can lead to engine damage if not addressed promptly.

Another common engine issue reported by XJR575 owners is related to the supercharger. Some owners have reported failure of the supercharger, which can result in a loss of power and reduced engine performance. The supercharger failure can be caused by a number of factors, including wear and tear, insufficient maintenance, or faulty parts.

In addition, some XJR575 owners have reported issues with the engine oil system. This can manifest as oil leaks, low oil pressure, or excessive oil consumption. These issues can be caused by worn engine components, faulty oil pumps or oil filters, or clogged oil passages.

Finally, some XJR575 owners have reported issues with the engine electronics, such as faulty sensors or malfunctioning engine control units (ECUs). These issues can lead to a variety of symptoms, including reduced engine performance, misfires, and other drivability issues.

Overall, while the Jaguar XJR575 is a powerful and impressive vehicle, it is not immune to common engine issues. Regular maintenance and timely repairs can help prevent these issues and keep the engine running smoothly.

4.2.3 Fuel system issues

The Jaguar XJR575 is a high-performance trim level of the XJR, and it is known for its powerful engine and dynamic handling. However, like any vehicle, it is not immune to issues. One common problem that XJR575 owners have reported is fuel system issues.

One common issue is related to the fuel pump. Some XJR575 owners have reported that the fuel pump fails prematurely, leading to issues with starting the vehicle or poor performance. Another fuel system issue is related to the fuel injectors. Some XJR575 owners have reported that the fuel injectors can become clogged or fail, leading to engine misfires or poor performance.

Fuel system issues can also be caused by problems with the fuel lines or fuel filter. Over time, the fuel lines can become brittle or cracked, leading to leaks or fuel delivery issues. The fuel filter can also become clogged, leading to poor fuel economy or engine performance.

It is important to have any fuel system issues addressed as soon as possible to prevent further damage to the engine or other components. Regular maintenance and inspections of the fuel system can help prevent these issues from occurring in the first place. If you notice any symptoms of a fuel system problem, such as poor performance or difficulty starting the engine, it is important to have your XJR575 inspected by a qualified technician.

5. Conclusion

5.1 Importance of proper maintenance and diagnosis

Proper maintenance and diagnosis are crucial when it comes to owning and operating a Jaguar XJR. With the variety of common issues that can occur across different engine types and trim levels, it is important to stay on top of routine maintenance tasks such as oil changes, filter replacements, and fluid flushes.

Regular diagnostic checks can also help to catch potential problems early, before they develop into more serious issues. With modern diagnostic tools, trained technicians can quickly identify and address issues such as electrical faults, transmission problems, and fuel system malfunctions.

By following manufacturer-recommended maintenance schedules and addressing any diagnostic issues promptly, Jaguar XJR owners can help to extend the life of their vehicles and avoid costly repairs down the road. Additionally, seeking out experienced and knowledgeable technicians for any maintenance or repair work can ensure that issues are correctly diagnosed and fixed the first time around.

5.2 Recommended steps for addressing common issues

In summary, the Jaguar XJR has several common issues that owners should be aware of, depending on the engine type and trim level. These issues can range from throttle body and transmission issues to supercharger failure and camshaft wear. To ensure the longevity of your vehicle and avoid costly repairs, it is essential to follow the recommended maintenance schedule and address any issues promptly.

When dealing with any of the common issues, it is important to take the proper steps to diagnose and address the problem. This includes conducting a thorough inspection of the affected area, testing the components, and identifying any worn or damaged parts. It is recommended to consult with a qualified Jaguar mechanic or dealership for assistance.

In addition to addressing common issues, it is also crucial to stay on top of routine maintenance tasks such as oil changes, fluid checks, and filter replacements. By keeping your vehicle well-maintained, you can avoid more significant problems down the line and extend the life of your Jaguar XJR.

Overall, with proper care and attention, the Jaguar XJR can be a reliable and enjoyable vehicle to own. By staying informed of common issues and taking the necessary steps to address them, you can ensure that your XJR runs smoothly and reliably for years to come.

5.3 Summary of key points

In summary, the Jaguar XJR has had its fair share of common issues depending on the engine type and trim level or configuration. These issues can range from transmission, fuel system, electrical, supercharger failure, engine oil leaks, camshaft wear, and suspension problems. It is important for owners to properly maintain their vehicles and have them regularly diagnosed by a qualified technician to prevent or address these issues promptly. Proper maintenance includes regular oil changes, replacing worn-out parts, and addressing any warning lights on the dashboard. For owners experiencing any of these common issues, recommended steps include seeking professional diagnosis, replacing faulty parts with high-quality replacements, and following manufacturer guidelines for repairs. Ultimately, with proper maintenance and timely diagnosis and repair, owners can continue to enjoy the performance and luxury of the Jaguar XJR for many years.

Example List of Jaguar XJR Engine Error Codes and Descriptions

Jaguar XJR FAQ: Addressing the Most Common Questions and Issues

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