This comprehensive service and repair manual provides detailed instructions, diagrams, illustrations, wiring schematics, and specifications to completely repair your 1980 BMW 3-series (E21). This manual covers all models and all repairs, offering the same information used by technicians at BMW dealerships.

With step-by-step instructions, you can confidently tackle any repair, from basic maintenance to complex engine work. The manual covers every aspect of your vehicle, including:

* **Maintenance:** Learn how to perform routine maintenance tasks like oil changes, filter replacements, and tune-ups.
* **Engine:** Diagnose and repair engine problems covering everything from fuel systems to ignition and electrical components.
* **Transmission:** Get detailed instructions for servicing manual and automatic transmissions, clutches, and drivetrain components.
* **Suspension and Steering:** Find information on diagnosing and repairing suspension, steering, and tire issues.
* **Brakes:** Learn how to service and repair all braking systems including disc brakes, drum brakes, and parking brakes.
* **Electrical Systems:** This manual includes detailed wiring diagrams and instructions for troubleshooting and repairing all electrical systems.
* **Body and Interior:** Service and repair information for body panels, interior components, air conditioning, and more.

This manual is designed to be user-friendly and easy to navigate. Print out the specific pages and diagrams you need for your particular repair project. You can enlarge images for greater clarity and detail. This manual will save you time and money by empowering you to perform your own repairs.

The BMW 3-series (E21) was the first generation of the iconic 3-series compact executive car, produced by BMW from 1975 to 1983. It was a groundbreaking model for BMW, introducing the world to the concept of a compact, sporty sedan that combined driving dynamics with everyday practicality. The E21 was based on a new platform, designed with a lightweight steel body and a rear-wheel drive layout. It was available with a range of four-cylinder petrol engines, ranging from 1.6 liters to 2.0 liters, offering a blend of performance and efficiency. The E21's clean, angular design, featuring a distinctive sloping hood and a low-profile roofline, became synonymous with the BMW brand. Its athletic handling and responsive engine made it a popular choice for both enthusiasts and commuters.

The E21 3-series was lauded for its well-balanced suspension and precise steering, which provided an engaging and rewarding driving experience. It offered a level of refinement and build quality that was uncommon in its segment, contributing to its enduring popularity. While the E21 was initially available in a two-door sedan body style, a more practical four-door sedan variant was added in 1977. The E21 was also offered with a variety of trim levels, including the sporty 320i and 323i models, which featured larger engines and enhanced performance features. Despite its compact dimensions, the E21 3-series offered sufficient interior space for five occupants and a practical trunk for luggage. Its overall design and engineering made it a successful model for BMW, establishing the 3-series as a cornerstone of the brand's reputation for luxury and performance. The E21 3-series paved the way for future generations of 3-series, solidifying its legacy as a truly iconic and influential vehicle.