The 2004 BMW 6 Series is a luxury sports coupe, marking the start of its fourth generation. The car introduced the 645Ci model, which boasts a 4.4-liter V8 engine churning out 325 horsepower. This engine mated either to a 6-speed manual or automatic transmission, and the model came with Rear Wheel Drive, exhibiting BMW's focus on dynamism and driving pleasure. Standard features in the 2004 model included Xenon headlights, leather seats, climate control, and essential safety features such as stability control and multiple airbags. The iDrive system, which was still in an early stage, featured on the 6 Series, controlling entertainment, navigation, and car settings. Noteworthy is the sleek, controversial styling theme under the lead of Chris Bangle, which differentiated it from its predecessors.