This comprehensive service and repair manual is specifically designed for the BMW 3-series (E21) model year 1977. It provides detailed instructions and diagrams covering all aspects of your vehicle's maintenance, service, diagnosis, and repair. This is the same manual used by authorized BMW technicians, ensuring you have access to the most accurate and up-to-date information.

The manual includes step-by-step instructions, clear illustrations, wiring schematics, and detailed specifications to guide you through every repair process with ease. The information is organized for easy navigation, eliminating the need to flip through multiple books to find what you need. You can print only the pages and diagrams relevant to your current task, keeping your workspace clutter-free.

The manual covers a comprehensive range of topics, including:

* **Maintenance:** Routine maintenance schedules, fluid checks, and adjustments.
* **Engine:** Detailed information on engine components, troubleshooting, and repair procedures.
* **Control System:** Understanding the vehicle's electronic systems, including diagnostics and troubleshooting.
* **Mechanical:** Detailed coverage of all mechanical systems, such as the transmission, drivetrain, suspension, and brakes.
* **Fuel Service Specifications:** Information on fuel system components, fuel types, and specifications.
* **Emission Control:** Guidance on emissions systems and their maintenance.
* **Intake Exhaust Cooling:** Understanding the cooling system and its components.
* **Lube:** Lubrication requirements and specifications for different components.
* **Ignition Starting Charging:** Troubleshooting and repair information for the ignition, starting, and charging systems.
* **Auto Transmission Clutch:** Repair procedures for automatic transmissions and clutches.
* **Manual Transmission:** Repair procedures for manual transmissions.
* **Transfer Propeller Shaft:** Understanding and repairing the transfer case and propeller shaft.
* **Drive Shaft:** Diagnosis and repair of the drive shaft.
* **Differential:** Details on the differential system, its components, and troubleshooting.
* **Axle Suspension:** Comprehensive coverage of the axle and suspension systems.
* **Tire & Wheel:** Information on tires, wheels, and related components.
* **Brake Control:** Understanding the brake control system and its operation.
* **Brake:** Detailed repair information for the brake system, including calipers, rotors, and pads.
* **Parking Brake:** Service and repair procedures for the parking brake.
* **Steering Column:** Diagnosis and repair of the steering column.
* **Power Steering:** Information on the power steering system and its components.
* **Air Condition:** Understanding and servicing the air conditioning system.
* **Suppl Restraint System:** Details on supplemental restraint systems, including airbags and seatbelts.
* **Seat Belt:** Information on seat belt systems and their maintenance.
* **Engine Immobilizer:** Troubleshooting and repair information for the engine immobilizer system.
* **Cruise Control:** Diagnosis and repair procedures for cruise control systems.
* **Wiper & Washer:** Understanding and repairing the wiper and washer systems.
* **Door Lock:** Service and repair information for door locks and related components.
* **Meter Audio/Visual:** Information on the instrument cluster and audio/visual systems.
* **Horn:** Troubleshooting and repair procedures for the horn.
* **Windshield/Glass Mirror:** Details on the windshield, glass, and mirrors.
* **Instrument Panel:** Information on the instrument panel and its components.
* **Seat:** Repair information for the seats and their mechanisms.
* **Engine Hood/ Door:** Service and repair procedures for the engine hood and doors.
* **Exterior & Interior:** Details on the exterior and interior of the vehicle.
* **Electrical:** Comprehensive coverage of the electrical system, including wiring diagrams and troubleshooting.
* **Multiplex/ Can Communication:** Understanding the multiplex and CAN communication systems.

This manual is compatible with all versions of Windows and Mac operating systems. It is designed to empower you to confidently diagnose and repair your BMW 3-series (E21) and save money on costly repairs.

The BMW 3-series (E21) is a compact executive car that marked the beginning of the iconic 3-series lineage, marking a shift in BMW's focus towards smaller, more affordable models. Introduced in 1975 and produced until 1983, the E21 embodied a new era for BMW, emphasizing driving dynamics and performance in a package that was both stylish and practical. This unique combination proved immensely popular, establishing the 3-series as a benchmark for its segment and laying the foundation for its enduring success. The E21, initially offered in 316, 318, and 320 variations, employed a rear-wheel drive layout, a hallmark of BMW's philosophy. It was the first BMW to feature a fully independent suspension, enhancing its handling prowess and offering a level of comfort previously unseen in its class. The E21's design, penned by Paul Bracq, was a bold departure from the previous generation of BMWs. Its angular lines, sharp creases, and a prominent front grille gave it a distinctive appearance, reflecting the era's emerging design trends.

Beyond aesthetics, the E21's driving experience was transformative. Its lightweight construction, paired with a range of powerful and efficient engines, delivered a thrilling performance that became synonymous with BMW. The available models ranged from the modest 316, with its 1.6-liter engine, to the more potent 320i, featuring a 2.0-liter, four-cylinder engine delivering a healthy 122 horsepower. The E21's ability to blend practicality and performance resonated with drivers seeking a sporty and engaging driving experience. Its compact dimensions, comfortable interior, and ample cargo space made it an ideal all-rounder, suitable for everyday commutes and weekend adventures. The E21's lasting legacy lies not only in its technical innovations but also in its cultural impact. It became a popular choice among car enthusiasts, inspiring a vibrant aftermarket scene and contributing to the development of motorsport subcultures. Today, the E21 remains a highly desirable classic car, appreciated for its historical significance and timeless appeal. Its influence continues to be felt in the modern 3-series, which proudly carries the torch of its predecessor's innovative spirit and enduring legacy.