The 1987 BMW M3, chassis code E30, represents a significant milestone in automotive history, being the first M3 model homologated for motorsport. Powered by the naturally aspirated S14 inline-4 engine, this performance icon delivered 192 horsepower and was exclusively paired with a 5-speed manual Getrag 265 transmission. Its compact dimensions, weighing approximately 1,200 kg, and a wheelbase of 2,565 mm, contributed to its renowned agile handling and racing prowess. The M3 E30 is celebrated for its engineering precision, motorsport heritage, and status as a highly desirable modern classic, with around 17,970 units produced in Munich, Germany between 1986 and 1991.

This Electrical Troubleshooting Manual (ETM) provides comprehensive coverage for the 1987 BMW M3 E30, focusing on detailed electrical systems troubleshooting and repair. It includes in-depth information on powertrain electrical systems such as the Engine Control Unit (ECU) and fuel injection, as well as chassis electrical components like lighting, wipers, and power windows. The manual offers step-by-step diagnostic procedures, component testing guides, intricate wiring diagrams, and fuse/relay identification. This resource is invaluable for owners, mechanics, and technicians seeking to maintain and repair the complex electrical systems specific to this legendary performance vehicle, ensuring its optimal function and longevity.