This manual covers the 1991 BMW 5-series (E34), a mid-size luxury sedan renowned for its exceptional driving dynamics, sophisticated engineering, and high-quality interior. As a successor to the E28 and predecessor to the E39, the E34 generation solidified BMW's reputation as the provider of the ultimate driving machine. This particular model year offers a range of potent inline-six engines, including the M20B25 and M50B25, paired with either a Getrag manual or ZF automatic transmission, all contributing to its balanced chassis and responsive performance. The 1991 5-series is characterized by its clean, aerodynamic design, driver-focused cockpit, and a suite of advanced features for its time, including ABS and optional traction control, making it a benchmark in its class.

This comprehensive factory service manual provides in-depth coverage for all aspects of the 1991 BMW 5-series (E34). It details routine maintenance procedures, troubleshooting guides, and complete repair instructions for every major system, including the engine (M20, M30, M50, M52 variants), transmission, drivetrain, suspension, steering, brakes, electrical systems, bodywork, and HVAC. With factory-level detail, torque specifications, special tool requirements, and clear wiring diagrams, this manual is an indispensable resource for owners, mechanics, and technicians. Its purpose is to ensure the proper maintenance, diagnosis, and repair of the vehicle, maintaining its performance and longevity.