This workshop service manual provides comprehensive repair and maintenance information for the BMW 3 Series, specifically the 330i and 330xi models produced between 2006 and 2010. These vehicles, built on the E90 (Sedan) and E91 (Wagon/Touring) chassis codes, are renowned for their exceptional driving dynamics, embodying BMW's commitment to the 'Ultimate Driving Machine' philosophy. Powered by the smooth and potent N52B30 3.0-liter inline-six engine, these models offer a blend of performance and luxury, making them a popular choice in the premium compact executive segment. The availability of rear-wheel drive and the advanced xDrive all-wheel drive system further enhances their versatility.

This manual is designed to be an indispensable resource for owners, technicians, and mechanics. It covers all essential aspects of vehicle care, including detailed procedures for scheduled maintenance, engine and transmission servicing, chassis and suspension repairs, and electrical system diagnostics. With extensive coverage of troubleshooting, component replacement, and technical specifications, this guide ensures that the BMW 3 Series can be maintained to the highest standards. It includes in-depth information on the powertrain, chassis, electrical systems, and body, along with specific guidance on common issues and specialized repair techniques, empowering users to effectively service and repair their vehicle.