This manual covers the BMW 5-Series E34, specifically the 520i model produced for the 1990 and 1991 model years. As a mid-size luxury sedan, the E34 represented a significant advancement in BMW's lineup, emphasizing driver engagement, refined performance, and robust build quality, often competing with established European luxury marques. The 520i variant, powered by the M50B20 inline 6-cylinder engine, offered a balance of BMW's renowned driving dynamics and a more accessible entry into the executive sedan segment. Its design philosophy focused on a driver-centric experience, a hallmark of the brand, and it was known for its smooth powertrain and balanced chassis.

This comprehensive factory service manual provides detailed information for the maintenance, diagnosis, and repair of the BMW 5-Series E34 520i. It covers all major systems, including engine mechanicals, fuel delivery, ignition, transmission (manual and automatic), drivetrain, brakes, suspension, steering, and the electrical system. The manual includes step-by-step repair procedures, troubleshooting guides with diagnostic flowcharts, technical specifications, and information on special tools required for various tasks. Its scope ranges from routine maintenance, such as fluid changes and filter replacements, to in-depth overhauls and component diagnostics, making it an essential resource for owners, technicians, and mechanics.