This comprehensive BMW E34 525i, 535i, M5 5 Series 1990-1991 Electronic Troubleshooting Manual provides an invaluable resource for technicians, mechanics, and anyone interested in learning about the intricacies of these vehicles. This manual goes beyond basic repair procedures and dives into the technical aspects of the car, offering detailed explanations, diagrams, and troubleshooting steps for a wide array of issues.

From general maintenance and troubleshooting to in-depth coverage of engine, transmission, brake, wiring, electrical, suspension, steering, cooling, fuel injection, fuel system, emission system, heater and air conditioning, engine control, chassis and body, restraint system, interior, differential and drive axle, and much more, this manual covers virtually every aspect of the vehicle. With detailed explanations and illustrations, you can gain a thorough understanding of your car's systems and confidently tackle repairs.

The BMW E34 5 Series, produced from 1988 to 1995, represented a significant evolution for the German marque, introducing a more refined and luxurious take on the mid-size executive sedan. The E34 was the first 5 Series to feature a fully independent suspension, providing a more comfortable and responsive ride. It also boasted a range of potent engines, including the iconic straight-six M50 powerplant for the 525i and 535i models. The 535i, with its 3.5-liter engine, delivered impressive performance while the 525i offered a more balanced blend of power and efficiency. The introduction of the E34 M5 marked the beginning of a new era for BMW's high-performance division, showcasing a powerful 3.5-liter, 315-horsepower engine paired with a 5-speed manual transmission.

The E34's design, penned by Claus Luthe, was both elegant and functional, with a sleek, aerodynamic profile complemented by a well-appointed interior. The interior showcased a driver-focused cockpit with a high-quality leather-wrapped steering wheel and comfortable seats. The model's sophisticated engineering and premium features cemented its position as a true luxury car, attracting a discerning clientele that appreciated both its performance and comfort. Today, the E34 5 Series remains a popular classic, sought after by collectors and enthusiasts alike for its timeless design, strong performance, and enduring quality. It represents a pivotal chapter in BMW's history, laying the groundwork for the brand's future success in the luxury sedan market. This troubleshooting manual, specifically for the 1990 and 1991 models, is invaluable for owners and mechanics, providing detailed insights into the vehicle's intricate electrical systems to help diagnose and resolve issues effectively.