American Aerios came in two trim levels: the S and GS (2002-2004), S and LX (2005), and Base and Premium (2006-2007). Key changes over the years included an upgrade to a new 2.3-liter 155horsepower (116kW) engine in 2004, a major styling and interior refresh in 2005 (replacing the strange digital instruments with conventional analog ones), and the standardization of antilock brakes in 2006. Only the Aerio sedan remained for 2007, as the hatchback had been shelved to make room for the new 2007 SX4 hatchback. Likewise, the Aerio sedan bowed out at year's end, making way for the 2008 SX4 Sport sedan. Throughout its run, the Aerio was distinct for being the most affordable car in America to offer all-wheel-drive.
In Europe, where the car is called Liana (an acronym for "Life In A New Age"), it's seen as a more affordable alternative to small family cars or to mini MPVs, introducing a new generation of Suzuki M engines, with 1.3L and 1.6L I4 engine. All wheel drive is available on the bigger engine. In 2004 the car was restyled with a look that closer resembled the Japanese version, and also received a Diesel engine, with a 16-valve version of the 1.4L HDi engine supplied by PSA Peugeot Citroën, capable of 90PS (66kW; 89hp) thanks to common rail direct injection and a variable geometry turbocharger.