The BMW M3 (E30) is an iconic performance vehicle, produced from 1986 to 1991. This homologation special, developed by BMW M GmbH, is renowned for its motorsport heritage and exceptional driving dynamics, drawing direct lineage from successful touring car racing campaigns. Featuring a distinctive, aerodynamically enhanced bodywork, a high-revving S14 naturally aspirated inline-four engine producing 195 horsepower, and a standard limited-slip differential, the E30 M3 stands apart from its standard E30 siblings. Its engineering quality and reliability have cemented its status as a highly sought-after classic, competing with performance coupes of its era through its unique blend of track-bred capability and everyday usability.

This comprehensive service repair workshop manual provides in-depth technical information essential for the maintenance and repair of the 1986 BMW M3 (E30) with the S14 engine. It covers all major topics, including detailed procedures for engine mechanicals, fuel injection, transmission overhaul, suspension, brakes, steering, and the electrical system. The manual also details routine maintenance, diagnostic troubleshooting, component rebuilds, and adjustment procedures, offering specific torque specifications and assembly sequences. Its purpose is to guide owners, mechanics, and technicians in preserving the performance and integrity of this legendary vehicle, ensuring it remains in optimal condition.