This comprehensive Service Repair Workshop Manual provides in-depth information and guidance for servicing and repairing your BMW 633CSI and 635CSI, including the M6 model, covering years 1983 through 1989. It is designed for both professional mechanics and DIY enthusiasts, offering detailed instructions and clear illustrations to help you confidently tackle any repair job. The manual covers the entire vehicle, from front to back, detailing every aspect of its operation and maintenance. It includes step-by-step repair procedures, accompanied by highly detailed exploded diagrams and pictures, ensuring you understand each step and complete the task efficiently and correctly. This manual is an essential resource for anyone looking to perform their own repairs and maintenance, or simply gain a deeper understanding of their BMW.

The BMW 633CSI and 635CSI, along with the high-performance M6, were iconic coupes produced by the German automaker from 1983 to 1989. These models were the second generation of the 6 Series, succeeding the original E24. The 633CSI and 635CSI were powered by 3.2L and 3.5L inline-six engines, respectively, delivering smooth power and impressive performance for their time. The flagship M6, however, was propelled by a 3.5L, 286-horsepower M88/3 engine, an evolution of the renowned M1 engine, catapulting the M6 to supercar status. These vehicles were known for their elegant styling, with long, sweeping lines, a distinctive sloping roofline, and a spacious interior. The interiors featured luxurious materials, comfortable seats, and a driver-focused layout. The 6 Series also offered features that were rare for its time, including power windows, power seats, air conditioning, and a sophisticated audio system. Beyond the luxurious appointments, the 6 Series was designed with a focus on athletic driving dynamics. The cars featured independent suspension, power-assisted steering, and powerful brakes, allowing for confident and engaging driving experiences. The 6 Series offered a blend of performance, luxury, and style that was unmatched at the time. They became highly sought-after cars, not only for their driving characteristics but also for their timeless design and exclusivity. The limited-production M6, with its high-revving engine and exceptional handling, held particular significance among automotive enthusiasts as a true performance icon. The "CSI" designation in the 633CSI and 635CSI stood for "Coupé Sport Injection," highlighting the injection-powered engines and the sporty nature of these vehicles. The 6 Series continued to shape BMW's image as a manufacturer of high-quality, performance-oriented vehicles with a focus on driver satisfaction, contributing significantly to the brand's legacy of automotive excellence.