The 2009 BMW 3 Series sedan and wagon variants receive a variety of mild styling updates as well as a slight increase in rear track width. A redesigned iDrive controller debuts for the optional navigation system, which is now hard-drive-based and features real-time traffic. Later in the model year, the 3 Series sedan gets an optional twin-turbocharged clean-diesel engine. Finally, all-wheel-drive models are now badged xDrive, and a handful of features are new or revised.
