The 2008 BMW 1 Series Convertible and Coupe, including the 128i and 135i models, represents BMW's entry into the compact luxury sports segment. These vehicles are characterized by their renowned driving dynamics, rear-wheel-drive architecture, and sporty styling, offering a compelling blend of performance and premium features. The 128i is powered by a smooth 3.0L naturally aspirated inline-six engine, while the 135i features a more potent 3.0L twin-turbocharged inline-six, both delivering characteristic BMW power delivery. The introduction of the iDrive infotainment system further enhances the user experience, integrating control over various vehicle functions.

This manual serves as a comprehensive guide for owners and operators of the 2008 BMW 1 Series Convertible and Coupe. It covers essential information regarding vehicle operation, safety features, and the iDrive system, alongside basic troubleshooting guidance. Within its pages, you will find details on powertrain, chassis, and electrical systems, as well as comfort and convenience features. The manual also outlines routine maintenance checks, fueling procedures, and emergency protocols, providing the necessary knowledge to understand and care for your vehicle.