This comprehensive service and repair manual for the 1977 BMW 5-series (E12) model is a valuable resource for anyone looking to maintain, service, diagnose, and repair their vehicle. It provides the same detailed information used by technicians at BMW dealerships, ensuring you have everything you need to perform repairs with confidence.

The manual features complete step-by-step instructions, accompanied by clear diagrams and illustrations. It includes detailed wiring schematics and specifications, allowing you to fully understand the intricate workings of your BMW. From basic maintenance tasks to complex repairs, this manual covers it all.

The manual is organized into sections covering various aspects of the vehicle, including:

* **Engine:** Covers maintenance, repair, and troubleshooting for the engine, including fuel system, emission control, cooling system, lubrication, ignition, and starting systems.
* **Transmission & Drivetrain:** Provides comprehensive information on manual and automatic transmissions, transfer case, propeller shaft, drive shaft, differential, axles, and suspension systems.
* **Brakes:** Details the brake system, including control components, brake mechanisms, parking brake, and steering components.
* **Electrical System:** Includes wiring diagrams and instructions for the electrical system, including the multiplex/CAN communication system, and other electrical components.
* **Body & Interior:** Covers the body, interior, and comfort features, including the air conditioning system, seatbelts, engine immobilizer, cruise control, wipers and washers, door locks, audio/visual systems, and more.

This manual is a must-have for any owner or enthusiast of a 1977 BMW 5-series (E12). It empowers you to perform repairs and maintenance with confidence, saving you money and allowing you to better understand your vehicle.

The BMW 5-Series (E12), launched in 1972, marked a significant departure from the brand's previous offerings and established the foundation for the iconic 5-Series line. The E12 was designed to be a premium mid-size sedan, offering a blend of performance, comfort, and handling that set it apart from competitors. It introduced a new level of sophistication to the BMW brand, with its sleek and modern design, featuring a distinctive "shark nose" front grille and a low-slung silhouette. The E12 was also praised for its well-appointed interior, with luxurious materials and a driver-focused layout. Under the hood, it boasted a range of powerful and efficient engines, including the iconic M30 inline-six, which delivered a balance of smooth power and fuel efficiency. The E12's advanced technology, such as independent suspension and disc brakes on all four wheels, contributed to its exceptional handling and ride quality, further solidifying its reputation as a driving enthusiast's choice.

The BMW 5-Series (E12) became an instant success, receiving critical acclaim for its design, performance, and overall driving experience. It quickly gained a loyal following, particularly among those seeking a car that offered both luxury and sportiness. The E12's impact extended beyond its initial success; it laid the groundwork for the future generations of the 5-Series, establishing its reputation as a benchmark for luxury sport sedans. The E12's legacy continues to resonate today, with its timeless design and engineering innovations still appreciated by enthusiasts and collectors alike. The 1977 Service and Repair Manual serves as a valuable resource for those seeking to maintain and restore these iconic vehicles, offering detailed information on mechanical components, electrical systems, and troubleshooting procedures, ensuring that these classic BMWs can continue to be enjoyed for generations to come.