The BMW 525i, model code E28, represents the second generation of BMW's executive sedan, produced from 1981 through 1991. This model embodies BMW's renowned 'Ultimate Driving Machine' ethos, characterized by sporty handling, driver engagement, and robust engineering. Designed for discerning drivers who value performance and build quality, the 525i was a strong competitor in the luxury mid-size sedan market. It featured a 2.5-liter inline 6-cylinder M30 engine, delivering approximately 150-170 horsepower, and was available with either a Getrag 5-speed manual or a ZF 4-speed automatic transmission. Its durable construction and sophisticated design made it a benchmark for its class.

This comprehensive Factory Service Repair Workshop Manual provides essential information for the maintenance and repair of the BMW 525i (E28) from 1981 to 1991. It covers all major systems, including the engine (M30B25), transmission, drivetrain, suspension, brakes, steering, and electrical systems, in addition to bodywork and HVAC. The manual details routine maintenance procedures, troubleshooting guides for common issues, step-by-step repair instructions, and critical technical specifications such as torque values and fluid capacities. With its high-resolution diagrams and detailed explanations, this manual serves as an indispensable resource for owners, mechanics, and technicians aiming to preserve the performance and longevity of their vehicle.