Spanning 20 years and 4 different chassis codes, the BMW 325i is quite possibly the most famous of all their entry level compacts. It was always built with a 2.5L straight 6-cylinder engine; however with each evolution of the chassis the engine also evolved to include improvements to fuel injection, ignition and valve timing, compression ratios, fuel economy, and emissions - not to mention horsepower. Handling also improved through the years as suspension components became stiffer and the body construction more rigid. Over the course of its life, BMW 325i parts have always been engineered to offer the best performance available. It's been the leader in its class for decades, and the benchmark for satisfaction. Fun fact: Albert Brooks drove an E30 BMW 325i cabriolet in the film Defending Your Life.