Common Issues with the Isuzu Bighorn: A Comprehensive Guide

By Brian Wong, Reviewed by: Kurt Niebuhr, Updated on April 24, 2024

1. Common Issues with the Isuzu Bighorn

1.1. Engine Issues

The Isuzu Bighorn is a powerful and versatile SUV, but like any vehicle, it is prone to certain issues with its engine. Here are some of the most common engine issues with the Isuzu Bighorn:

- Overheating: One of the most common engine issues with the Isuzu Bighorn is overheating. This can be caused by a variety of factors, including a malfunctioning radiator, a faulty water pump, a clogged cooling system, or a blown head gasket. If your engine is overheating, it is important to address the issue as soon as possible to prevent further damage.

- Oil Leaks: Oil leaks are another common engine issue with the Isuzu Bighorn. This can be caused by a variety of factors, including worn out gaskets, cracked seals, or damaged oil pans. If left unaddressed, oil leaks can cause engine damage and even failure.

- Lack of Power: A lack of power or acceleration is another common engine issue with the Isuzu Bighorn. This can be caused by a variety of factors, including clogged air filters, faulty fuel injectors, or a malfunctioning engine control module. If you are experiencing a lack of power, it is important to address the issue as soon as possible to prevent further damage.

- Engine Misfires: Engine misfires are another common engine issue with the Isuzu Bighorn. This can be caused by a variety of factors, including faulty spark plugs, a malfunctioning ignition system, or a clogged fuel filter. Engine misfires can cause poor performance and even engine damage if left unaddressed.

- Timing Belt Failure: The timing belt is an essential component of the Isuzu Bighorn's engine, and if it fails, it can cause serious engine damage. Symptoms of timing belt failure include a ticking noise, difficulty starting the engine, or engine misfires. If you suspect your timing belt is failing, it is important to address the issue as soon as possible to prevent further damage.

Overall, the Isuzu Bighorn is a reliable and capable SUV, but engine issues can arise over time. By understanding the common engine issues with the Isuzu Bighorn, owners can take steps to prevent and address these problems. Regular maintenance, proper driving habits, and prompt repairs and replacements can all contribute to a longer and healthier lifespan for your Isuzu Bighorn. If you are experiencing engine issues with your Isuzu Bighorn, it is recommended to seek the assistance of a qualified mechanic or dealership for accurate diagnosis and repair.

1.2. Transmission Issues

The Isuzu Bighorn is a rugged and capable SUV, but it can experience issues with its transmission over time. Here are some of the most common transmission issues with the Isuzu Bighorn:

- Shifting Problems: One of the most common transmission issues with the Isuzu Bighorn is shifting problems. This can be caused by a variety of factors, including low transmission fluid, a worn out clutch, or a faulty shift solenoid. Shifting problems can cause poor performance and even damage to the transmission if left unaddressed.

- Slipping Gears: Slipping gears are another common transmission issue with the Isuzu Bighorn. This can be caused by worn out clutch plates, low transmission fluid, or a damaged torque converter. Slipping gears can cause poor performance and even damage to the transmission if left unaddressed.

- Transmission Fluid Leaks: Transmission fluid leaks are another common issue with the Isuzu Bighorn's transmission. This can be caused by worn out gaskets, damaged seals, or a cracked transmission pan. If left unaddressed, transmission fluid leaks can cause damage to the transmission and even failure.

- Delayed Engagement: Delayed engagement is another common transmission issue with the Isuzu Bighorn. This can be caused by a variety of factors, including low transmission fluid, a worn out clutch, or a faulty shift solenoid. Delayed engagement can cause poor performance and even damage to the transmission if left unaddressed.

- Torque Converter Failure: The torque converter is an essential component of the Isuzu Bighorn's transmission, and if it fails, it can cause serious transmission damage. Symptoms of torque converter failure include a loss of power or acceleration, and difficulty shifting gears. If you suspect your torque converter is failing, it is important to address the issue as soon as possible to prevent further damage.

Overall, the Isuzu Bighorn is a reliable and capable SUV, but transmission issues can arise over time. By understanding the common transmission issues with the Isuzu Bighorn, owners can take steps to prevent and address these problems. Regular maintenance, proper driving habits, and prompt repairs and replacements can all contribute to a longer and healthier lifespan for your Isuzu Bighorn's transmission. If you are experiencing transmission issues with your Isuzu Bighorn, it is recommended to seek the assistance of a qualified mechanic or dealership for accurate diagnosis and repair.

1.3. Suspension and Brake Issues

The Isuzu Bighorn is a sturdy and capable SUV, but like any vehicle, it can experience issues with its suspension and brakes. Here are some of the most common suspension and brake issues with the Isuzu Bighorn:

- Worn Out Shock Absorbers: Shock absorbers are an essential component of the Isuzu Bighorn's suspension system, and if they are worn out, they can cause poor handling, rough rides, and even damage to the vehicle's tires and suspension. Signs of worn out shock absorbers include excessive bouncing, excessive noise, and poor handling.

- Broken Springs: Broken springs are another common suspension issue with the Isuzu Bighorn. This can be caused by a variety of factors, including heavy loads, rough terrain, and general wear and tear. Broken springs can cause poor handling, uneven ride height, and even damage to other suspension components if left unaddressed.

- Brake Pad Wear: The Isuzu Bighorn's brake pads are responsible for stopping the vehicle, and if they are worn out, they can cause poor braking performance, longer stopping distances, and even damage to the brake rotors. Signs of worn out brake pads include a squeaking or grinding noise when braking, and longer stopping distances.

- Brake Rotor Warping: Brake rotor warping is another common brake issue with the Isuzu Bighorn. This can be caused by excessive heat, heavy loads, and hard braking. Signs of warped brake rotors include a pulsing or vibrating brake pedal, and poor braking performance.

- Suspension Bushing Wear: Suspension bushings are responsible for absorbing shock and vibrations from the road, and if they are worn out, they can cause poor handling, excessive noise, and even damage to other suspension components. Signs of worn out suspension bushings include excessive noise, poor handling, and uneven tire wear.

Overall, the Isuzu Bighorn is a reliable and capable SUV, but suspension and brake issues can arise over time. By understanding the common suspension and brake issues with the Isuzu Bighorn, owners can take steps to prevent and address these problems. Regular maintenance, proper driving habits, and prompt repairs and replacements can all contribute to a longer and healthier lifespan for your Isuzu Bighorn's suspension and brakes. If you are experiencing suspension or brake issues with your Isuzu Bighorn, it is recommended to seek the assistance of a qualified mechanic or dealership for accurate diagnosis and repair.

2. Issues by Model Year and Engine Type

2.1. First Generation (1981-1991)

The first generation of the Isuzu Bighorn was produced from 1981 to 1991, and during this time, the SUV underwent several changes and updates. Here are some common issues by model year and engine type for the first generation Isuzu Bighorn:

1981-1985:
- One common issue with the first generation Isuzu Bighorn from 1981-1985 was rust, particularly in the undercarriage and wheel wells. Owners of these models should regularly inspect the vehicle for rust and address any issues promptly.
- The early models of the Isuzu Bighorn were also known to have issues with overheating, which could be caused by a variety of factors, including a malfunctioning radiator, faulty thermostat, or a worn water pump. Owners of these models should have the cooling system inspected regularly to prevent overheating.
- Engine options for these models included a 2.0L gasoline engine, a 2.2L diesel engine, and a 2.3L gasoline engine.

1986-1991:
- One of the most common issues with the later models of the first generation Isuzu Bighorn from 1986-1991 was the automatic transmission. Some models were known to have problems with the torque converter, which could cause the transmission to slip or fail. Regular maintenance and prompt repairs can help prevent transmission issues.
- Another issue with these models was the rear brake system, which could be prone to locking up and causing handling issues. This was caused by a faulty proportioning valve, which should be inspected and replaced if necessary.
- Engine options for these models included a 2.3L and 2.6L gasoline engine, a 2.8L diesel engine, and a 2.5L turbodiesel engine.

Overall, the first generation Isuzu Bighorn was a capable and popular SUV, but like any vehicle, it had its share of issues. By understanding the common issues by model year and engine type, owners can take steps to prevent and address these problems, ensuring a longer and healthier lifespan for their Isuzu Bighorn. It is recommended to seek the assistance of a qualified mechanic or dealership for accurate diagnosis and repair of any issues with your first generation Isuzu Bighorn.

2.2. Second Generation (1992-2002)

The second generation of the Isuzu Bighorn was produced from 1992 to 2002, and it underwent significant changes compared to the first generation. Here are some common issues by model year and engine type for the second generation Isuzu Bighorn:

1992-1998:
- One common issue with the early models of the second generation Isuzu Bighorn from 1992-1998 was with the diesel engines. Some models were known to have issues with fuel injection pumps and injectors, which could cause rough idling, decreased fuel efficiency, and even engine failure. Regular maintenance and prompt repairs can help prevent these issues.
- Another issue with these models was the power steering system, which could develop leaks and cause a loss of power steering fluid. This could result in difficulty steering and potential safety hazards. Owners of these models should regularly check the power steering fluid level and inspect the system for leaks.
- Engine options for these models included a 2.2L and 2.8L diesel engine, a 3.1L turbodiesel engine, and a 3.2L gasoline engine.

1998-2002:
- One of the most common issues with the later models of the second generation Isuzu Bighorn from 1998-2002 was with the automatic transmission. Some models were known to have issues with the solenoids, which could cause the transmission to slip or shift erratically. Regular maintenance and prompt repairs can help prevent transmission issues.
- Another issue with these models was with the suspension system. Some models were known to have issues with the rear suspension, which could cause a harsh ride and handling problems. This was often caused by worn bushings or shock absorbers, which should be inspected and replaced if necessary.
- Engine options for these models included a 3.0L and 3.1L diesel engine, a 3.2L and 3.5L gasoline engine, and a 3.2L V6 gasoline engine.

Overall, the second generation Isuzu Bighorn was a capable and reliable SUV, but like any vehicle, it had its share of issues. By understanding the common issues by model year and engine type, owners can take steps to prevent and address these problems, ensuring a longer and healthier lifespan for their Isuzu Bighorn. It is recommended to seek the assistance of a qualified mechanic or dealership for accurate diagnosis and repair of any issues with your second generation Isuzu Bighorn.

2.3. Limited Edition and Special Models

The Isuzu Bighorn had a variety of limited edition and special models throughout its production years, each with its own unique features and issues. Here are some of the notable models and issues by model year and engine type:

1. Isuzu Bighorn Horizon (1993-1994)
The Horizon was a special edition Isuzu Bighorn that was released in 1993-1994. It came with a 3.2-liter V6 engine and a 4-speed automatic transmission. The Horizon was equipped with a luxurious interior, with leather seats and wood trim. However, some owners reported issues with the transmission slipping or failing altogether.

2. Isuzu Bighorn Irmscher R (1997-1998)
The Irmscher R was a limited edition Isuzu Bighorn that was released in 1997-1998. It came with a 3.1-liter turbo diesel engine and a 5-speed manual transmission. The Irmscher R was a sportier version of the Bighorn, with upgraded suspension and brakes. However, some owners reported issues with the engine overheating and the clutch failing prematurely.

3. Isuzu Bighorn Lotus Edition (1998-2001)
The Lotus Edition was a special edition Isuzu Bighorn that was released in 1998-2001. It came with a 3.2-liter V6 engine and a 4-speed automatic transmission. The Lotus Edition was equipped with unique styling features, such as Lotus badging and a body kit. However, some owners reported issues with the engine stalling or losing power, as well as issues with the air conditioning system.

4. Isuzu Bighorn Aero (2000-2001)
The Aero was a limited edition Isuzu Bighorn that was released in 2000-2001. It came with a 3.0-liter turbo diesel engine and a 4-speed automatic transmission. The Aero was a more fuel-efficient version of the Bighorn, with improved aerodynamics and a lower ride height. However, some owners reported issues with the engine smoking and the transmission slipping or failing.

Overall, while these limited edition and special models of the Isuzu Bighorn had unique features and issues, many of the issues were similar to those of the standard models. It's important for owners to stay up-to-date with routine maintenance and address any issues promptly to ensure the longevity and reliability of their vehicle.

3. Issues by Trim Level and Complectation

3.1. LS Trim Level

The Isuzu Bighorn LS trim level was introduced in the mid-1990s and was available until the end of the second generation in 2002. This trim level offered several features and options, but like any other vehicle, it was not immune to issues. Here are some common issues with the Isuzu Bighorn LS trim level, grouped by complectation:

LS 3.2 LWB:
- The air conditioning system may fail, often due to leaks in the system. Recharging the system may temporarily fix the issue, but a repair or replacement may be necessary.
- The front suspension ball joints may wear out prematurely, causing clunking noises and uneven tire wear. Replacement of the ball joints may be necessary.
- The power windows may stop working due to a faulty window regulator or motor. Replacing the faulty part should resolve the issue.

LS 3.5 LWB:
- The transmission may fail, especially in vehicles with high mileage or hard use. Symptoms may include slipping, hesitation, and difficulty shifting gears. A transmission rebuild or replacement may be necessary.
- The rear brake calipers may seize up, causing the brakes to drag and wear out prematurely. Replacing the calipers may be necessary.
- The fuel pump may fail, leading to a loss of power and stalling. Replacing the fuel pump should resolve the issue.

LS 3.5 SWB:
- The rear differential may develop leaks, which can lead to failure if the fluid level is not maintained. Repairing or replacing the differential may be necessary.
- The power steering system may develop leaks, leading to difficulty steering and a loss of power steering fluid. Repairing or replacing the affected parts should resolve the issue.
- The engine may develop a knocking noise, which can be caused by worn engine bearings. Rebuilding or replacing the engine may be necessary to resolve the issue.

Overall, the Isuzu Bighorn LS trim level was a well-equipped vehicle with a lot to offer. However, like any vehicle, it was prone to issues. Regular maintenance and prompt repairs can help ensure that these issues don't become major problems.

3.2. Limited Trim Level

The Isuzu Bighorn Limited trim level was introduced as a premium variant of the SUV, offering more luxurious features and amenities. However, it also faced some common issues that affected its performance and reliability.

One common issue reported in the Limited trim level is with the suspension system. The front suspension bushings are prone to wear and tear, causing a clunking noise when driving over bumps or rough terrain. This can lead to reduced handling and stability, and may require replacement of the bushings to solve the issue.

Another common issue is with the electrical system, particularly the power windows and locks. Some owners have reported malfunctioning window motors and switches, and in some cases, complete failure of the power lock system. This can be caused by a faulty relay or wiring issue, and may require professional diagnosis and repair.

The Limited trim level also faces issues with the automatic transmission. Some owners have reported slipping or rough shifting, which can be caused by low transmission fluid or a malfunctioning solenoid. In more severe cases, the transmission may require a rebuild or replacement to fully resolve the issue.

Lastly, some owners have reported issues with the air conditioning system in the Limited trim level. Common complaints include weak or inconsistent cooling, strange noises, and even complete failure of the system. This can be caused by leaks in the refrigerant system, faulty compressor or condenser, or a clogged expansion valve.

Overall, while the Isuzu Bighorn Limited trim level offers a more premium experience, it is not without its common issues. Owners should be aware of these potential issues and take appropriate steps to address them to ensure the longevity and reliability of their vehicle.

3.3. Lotus Trim Level

The Isuzu Bighorn Lotus is a special edition model that was produced between 1994 and 1996. It was named after the Lotus engineering firm, which assisted in the development of the vehicle. The Lotus model came with a number of upgrades and unique features, such as a body kit, 16-inch alloy wheels, and a sport-tuned suspension.

Despite its special features, the Lotus trim level did not come without its own set of issues. Some of the common problems reported by owners of the Isuzu Bighorn Lotus include:

1. Engine issues: Some owners reported issues with the Lotus model's engine, including problems with the fuel injectors, fuel pump, and idle control valve.

2. Transmission problems: The Lotus model's automatic transmission was known to have issues with slipping and shifting harshly. Some owners also reported problems with the manual transmission.

3. Electrical issues: Electrical issues were also reported, such as problems with the power windows, door locks, and radio.

4. Suspension and brake problems: The Lotus model's sport-tuned suspension could cause issues with ride comfort and handling, and some owners reported problems with the brakes.

5. Fuel efficiency: Some owners of the Isuzu Bighorn Lotus reported that the vehicle had poor fuel efficiency compared to other SUVs in its class.

If you are considering purchasing an Isuzu Bighorn Lotus, it is important to have the vehicle thoroughly inspected by a qualified mechanic to ensure that it is in good working condition. Regular maintenance and upkeep can also help prevent issues from developing over time.

4. Common Solutions for Isuzu Bighorn Issues

4.1. Regular Maintenance

Regular maintenance is crucial for keeping your Isuzu Bighorn running smoothly and preventing potential issues. Here are some common maintenance tasks that can help address and prevent issues with your Isuzu Bighorn:

1. Regular oil changes: Changing your engine oil and oil filter on a regular basis is crucial for keeping your engine running smoothly and preventing premature wear and tear. Consult your owner's manual for the recommended oil change interval for your specific Isuzu Bighorn model.

2. Tire maintenance: Regularly checking your tire pressure, rotating your tires, and replacing them when necessary can help improve your Bighorn's handling and prevent issues like uneven wear, vibrations, and blowouts.

3. Brake maintenance: Proper brake maintenance, including regular inspection, replacement of worn brake pads and rotors, and flushing and replacing brake fluid, can help prevent brake issues such as squeaking, grinding, or reduced stopping power.

4. Cooling system maintenance: Regularly checking and flushing your Bighorn's cooling system, replacing worn hoses and belts, and ensuring proper coolant levels can help prevent issues like overheating and engine damage.

5. Air filter replacement: Regularly replacing your engine air filter can help prevent issues like reduced performance and fuel efficiency caused by dirty or clogged air filters.

6. Transmission service: Regularly servicing your Bighorn's transmission, including replacing the transmission fluid and filter, can help prevent issues like slipping, harsh shifting, and premature transmission wear.

By performing these regular maintenance tasks and addressing any issues promptly, you can help ensure your Isuzu Bighorn runs smoothly and avoid potential issues down the road.

4.2. Proper Use and Driving Habits

Proper use and driving habits play a crucial role in maintaining the overall health and longevity of the Isuzu Bighorn. Some of the most common issues that owners face can be prevented with the proper use and care of the vehicle.

One important aspect of proper use is avoiding overloading the vehicle. The Isuzu Bighorn has a maximum weight capacity, and exceeding that weight can lead to issues with the suspension, brakes, and engine. It's important to check the owner's manual for the weight limit and avoid carrying more than that amount.

Another important aspect is driving habits. Regularly revving the engine and pushing the vehicle to its limits can put a strain on the engine and other mechanical components. It's important to drive the vehicle within its limits and avoid unnecessary strain on the engine and transmission.

Proper maintenance is also key. Regularly scheduled maintenance such as oil changes, filter replacements, and tire rotations can help prevent issues from occurring in the first place. Additionally, keeping an eye on fluid levels such as oil, coolant, and brake fluid can help prevent issues from developing.

Finally, proper driving habits can also help prevent issues with the transmission. Avoiding sudden acceleration and braking can help prevent damage to the transmission. Additionally, allowing the vehicle to come to a complete stop before shifting into reverse or drive can help prevent unnecessary strain on the transmission.

By following these proper use and driving habits, owners can help prevent common issues with the Isuzu Bighorn and ensure a long and healthy life for their vehicle.

4.3. Prompt Repairs and Replacements

Prompt repairs and replacements are important for maintaining the performance and longevity of the Isuzu Bighorn. If any issues arise, it is important to address them promptly to prevent further damage or costly repairs.

One common issue with the Isuzu Bighorn is engine overheating. This can be caused by a variety of factors, including a malfunctioning thermostat, a clogged radiator, or a faulty water pump. Promptly replacing these components can prevent further engine damage and improve the vehicle's overall performance.

Additionally, suspension and brake issues can also arise over time. Worn or damaged suspension components, such as shocks and struts, can lead to a rough ride and reduced handling. Similarly, worn brake pads and rotors can cause decreased braking power and increased stopping distances. Regularly inspecting and replacing these components can help to prevent more severe issues down the road.

When it comes to the transmission, prompt repairs and maintenance are crucial. Delayed shifting or slipping can be caused by worn transmission fluid or a faulty solenoid. Ignoring these issues can result in costly transmission repairs or even complete transmission failure.

Properly maintaining and promptly addressing any issues with the Isuzu Bighorn can extend the life of the vehicle and prevent more costly repairs down the road. Regularly scheduled maintenance, such as oil changes and tune-ups, can also help to prevent issues before they arise. In addition, following the manufacturer's recommended driving habits, such as avoiding excessive acceleration and maintaining proper tire pressure, can also improve the vehicle's performance and prevent unnecessary wear and tear.

5. Conclusion

In conclusion, the Isuzu Bighorn is a reliable and durable SUV, but like any other vehicle, it has its own set of issues that can occur. Some of the most common issues include engine problems such as overheating and oil leaks, transmission issues like slipping gears and rough shifting, and suspension and brake problems such as worn-out shocks and brakes.

These issues can be prevented or mitigated by following regular maintenance schedules, driving responsibly and safely, and addressing problems as soon as they arise. Regular maintenance includes oil changes, filter replacements, and brake inspections. Proper driving habits such as avoiding overloading the vehicle, driving smoothly, and avoiding harsh acceleration and braking can also help prolong the life of the vehicle.

Prompt repairs and replacements are crucial to preventing issues from becoming more severe and costly. It is important to address any issues as soon as they arise, and not to ignore any warning signs or strange noises coming from the vehicle.

By following these guidelines, Isuzu Bighorn owners can ensure that their SUVs remain reliable and enjoyable to drive for many years to come.

Example List of Isuzu Bighorn Engine Error Codes and Descriptions

Frequently Asked Questions About Isuzu Bighorn Issues and Maintenance

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