This comprehensive repair service manual is tailored for both car owners with basic mechanical skills and professional auto service technicians. It provides detailed specifications and procedures identical to those used by authorized BMW dealership service departments, empowering you to tackle repairs confidently. The manual covers every aspect of the BMW 518i and 525i E28 models produced between 1981 and 1988. Dive deep into sections detailing engine service and overhauling, transmission, chassis, body, wiring, fuel system, emission control, induction, mechanical controls, transmission and differentials, troubleshooting and diagnostics, steering and suspension, brakes, ABS, and complete specifications with torque settings. This manual goes beyond simple repair instructions. It guides you through diagnosing engine faults, researching and evaluating repair approaches, testing suspected parts using advanced techniques employed by top mechanics, tracing and verifying wiring diagrams, understanding complex engine management systems, and pinpointing common fixes. Equipped with this knowledge, you can effectively communicate with your mechanic, ensuring they understand the problem and provide the most efficient solution. You'll gain the ability to assess your mechanic's expertise and confidently verify their work post-repair. The manual also offers practical and quick solutions to common issues like no-starts, hesitations, and stalling, accompanied by clear illustrations for easy analysis. Proactive maintenance tips help you prevent minor problems from escalating into major repairs.

The BMW 5 Series (E28) is a mid-size executive car that was produced by BMW from 1981 to 1988. It was the second generation of the 5 Series model line, succeeding the E12 and preceding the E34. The E28 was a significant departure from its predecessor, featuring a more modern and aerodynamic design, a wider range of engine options, and a number of technological advancements. The car was praised for its handling, performance, and luxurious interior. The E28 was available with a variety of gasoline engines, ranging from the 2.0-liter M10 four-cylinder to the 3.5-liter M30 six-cylinder, including the iconic M535i with its 3.5-liter six-cylinder engine. It was also offered with a diesel engine, the 2.4-liter M21. The E28 was available in a variety of body styles, including a sedan, a touring wagon, and a rare M5 sports sedan. The E28 was also the first 5 Series to feature a four-wheel disc brake system, a feature that was previously only available on higher-end BMW models. The car was also equipped with a number of other innovative features, such as a digital instrument cluster and an optional sunroof.