This comprehensive service repair manual is your essential guide to maintaining and repairing your 1975-1983 BMW 3 Series E21. Delve into the intricacies of your vehicle with detailed instructions and diagrams covering a wide range of systems. From routine maintenance procedures to complex engine and transmission repairs, this manual provides the information you need to confidently tackle any job. Explore topics including engine operation, fuel system, ignition and starting, transmission and drivetrain, suspension and steering, brakes, electrical systems, climate control, and bodywork. Whether you are a seasoned mechanic or a DIY enthusiast, this manual empowers you to understand your BMW's inner workings and perform repairs with precision. Save time and money by taking on repairs yourself with the clear, step-by-step instructions provided.

The BMW 3 Series E21 was the first generation of the iconic 3 Series, manufactured by BMW from 1975 to 1983. It marked a significant departure from its predecessor, the 1800/2000, embracing a more modern design and a compact, sporty character that would become synonymous with the 3 Series nameplate. The E21 was a significant departure from BMW's previous designs, featuring a sleek, angular body with sharp lines and a distinctive "shark nose" front grille. It was available in a range of body styles, including a 2-door sedan, a 2-door coupe, and a rare 4-door sedan. The E21 was also the first BMW to feature an independent rear suspension, a technology that was previously reserved for luxury cars. This innovative design contributed to the car's agile handling and precise steering, making it a joy to drive.

Under the hood, the E21 offered a range of four-cylinder petrol engines, including the iconic M10 unit, known for its smooth performance and reliability. Power outputs ranged from the modest 75 hp of the 315 to the spirited 120 hp of the 323i. While not particularly powerful by today's standards, the E21's lightweight construction and balanced chassis made it incredibly responsive and engaging to drive. Notably, the E21 was the platform for the legendary BMW M1, a homologation special built to compete in motorsport. Its motorsport heritage, coupled with its practical design and driving dynamics, solidified the E21 as a cornerstone of the BMW brand, establishing the 3 Series as a benchmark for compact sports sedans. Today, the E21 remains a highly sought-after classic, appreciated for its timeless design, driving experience, and its place in automotive history.