This comprehensive repair service manual is your go-to guide for maintaining and repairing your BMW 518i, 520i, or 525i (E34 model) manufactured between 1988 and 1991. Whether you're a seasoned mechanic or a DIY enthusiast with basic mechanical skills, this manual provides the same detailed specifications and procedures used by authorized BMW service departments. Delve into a wealth of information covering every aspect of your vehicle, including: * **General Information:** Understand the fundamentals of your BMW, its design, and key components. * **Engine Service and Overhauling:** Learn how to maintain and repair your engine, from routine servicing to complete overhauls. * **Transmission:** Master the intricacies of your transmission system, including troubleshooting and repair techniques. * **Chassis:** Acquire comprehensive knowledge of your vehicle's chassis, suspension, and steering systems. * **Body:** Gain insights into bodywork repair, including techniques for addressing dents, scratches, and other cosmetic issues. * **Wiring:** Navigate the complex electrical system of your BMW, with detailed wiring diagrams and troubleshooting guides. * **Fuel System:** Understand the workings of your fuel system, from fuel injection to fuel lines and components. * **Emission Control:** Stay compliant with environmental regulations by learning about your vehicle's emission control system. * **Induction:** Explore the intricacies of your engine's intake system and learn how to optimize its performance. * **Mechanical:** Dive into the mechanical aspects of your vehicle, including brakes, clutch, and other essential components. * **Control System:** Gain a thorough understanding of your BMW's engine management system and its intricate electronic controls. * **Transmission and Differentials:** Uncover the secrets of your transmission and differential systems, with detailed procedures for maintenance and repair. * **Troubleshooting and Diagnostics:** Develop effective troubleshooting strategies to pinpoint and address any issues that may arise. * **Steering and Suspension:** Learn how to diagnose and repair problems related to your vehicle's steering and suspension systems. * **Brakes:** Become a brake system expert, mastering the intricacies of disc brakes, drum brakes, and ABS. * **ABS:** Understand the principles of Anti-lock Braking Systems (ABS) and learn how to troubleshoot and maintain this crucial safety feature. * **Full Specifications and Torque Settings:** Access a complete set of technical specifications and torque settings essential for accurate repairs. * **Service Work:** Find comprehensive guides for all necessary service procedures, including routine maintenance and major repairs. This manual empowers you to: * **Diagnose Engine Fault Symptoms:** Identify and address engine issues with confidence, using the detailed troubleshooting guides. * **Research and Evaluate Repair Solutions:** Make informed decisions about repairs by understanding the complexities of your vehicle. * **Test Suspected Parts:** Employ secret techniques used by professional mechanics to pinpoint faulty components. * **Trace and Verify Wiring Diagrams:** Navigate the electrical system with ease, using detailed wiring diagrams and pin connections. * **Understand and Analyze Engine Management Systems:** Become proficient in interpreting and troubleshooting your vehicle's electronic controls. * **Communicate Effectively with Mechanics:** Speak the language of mechanics and ensure you're getting the best service. * **Test Repairs:** Verify the quality of any repair work and ensure your vehicle is running smoothly. * **Resolve Common Problems:** Find practical solutions to common issues, including no-start conditions, hesitation, stalling, and more. * **Prevent Future Problems:** Learn essential maintenance tips to keep your BMW running smoothly and avoid costly repairs. This repair service manual is your ultimate resource for keeping your BMW 518i, 520i, or 525i (E34 model) in top condition.

The BMW 5 Series E34, produced from 1988 to 1995, represented a significant step forward for the German automaker. The 518i, 520i, and 525i models, specifically manufactured between 1988 and 1991, were notable for their refined driving dynamics and elegant styling. These sedans sported a sophisticated design language characterized by clean lines, a low-slung profile, and a more spacious interior compared to the previous generation. Under the hood, the 518i was powered by a 1.8-liter four-cylinder engine, while the 520i and 525i featured 2.0-liter and 2.5-liter six-cylinder engines respectively. These engines provided a balance of power and fuel efficiency, making the E34 5 Series a compelling choice for both everyday driving and longer journeys. The E34 5 Series was lauded for its handling prowess and comfortable ride. The car's independent suspension, coupled with its precise steering, offered a rewarding driving experience. Inside, the E34 featured a well-appointed interior with high-quality materials, generous legroom for both front and rear passengers, and a user-friendly dashboard layout. The availability of various optional features, including power seats, climate control, and a premium sound system, further enhanced the comfort and convenience offered by the car. While the E34 5 Series was a successful model, it is important to note that these older vehicles require proper maintenance and care to ensure reliable performance and longevity. This is where the repair service manual comes in, offering comprehensive information on all aspects of the car's operation, from routine maintenance to complex repairs.