The BMW M635CSi, produced from 1983 to 1989 under the E24 model code, stands as an iconic high-performance grand tourer coupe. Developed by BMW M GmbH, it leveraged motorsport expertise to deliver exceptional road-going performance, characterized by its M-tuned engine, advanced chassis dynamics, and aerodynamic styling. This model was a direct competitor to other luxury performance vehicles of the era, offering a blend of powerful acceleration from its naturally aspirated 3.5-liter inline-six engine and refined luxury appointments, making it a distinguished choice for discerning drivers.

This comprehensive workshop service manual provides detailed information for the repair and maintenance of the BMW M635CSi. It covers essential areas including routine maintenance procedures, in-depth troubleshooting guides, and complete engine and transmission overhaul instructions. The manual also details specifications for the fuel, ignition, drivetrain, suspension, braking, steering, and electrical systems, as well as bodywork and HVAC. Its purpose is to serve as an authoritative resource for owners, mechanics, and technicians, ensuring the continued optimal performance and longevity of this classic vehicle.