This comprehensive service repair manual provides detailed instructions for maintaining and repairing your 1975-1983 BMW 3 Series E21. It's designed for both do-it-yourselfers and experienced mechanics, offering step-by-step guidance based on complete vehicle disassembly. Hundreds of photos and illustrations complement the text, making it easy to understand and follow each procedure. The manual covers a wide range of topics, including:

* **Maintenance:** Regular servicing, fluid changes, and other preventative measures.
* **Engine:** Detailed information on the engine, including its components, operation, troubleshooting, and repair.
* **Control System:** Understanding and working with the engine control system.
* **Mechanical:** Guidance on the mechanical aspects of the car, such as the transmission, suspension, and brakes.
* **Fuel Service Specifications:** Information on fuel systems, including specifications and troubleshooting.
* **Emission Control:** Details on the emission control system.
* **Intake Exhaust Cooling:** Information on the intake, exhaust, and cooling systems.
* **Lube:** Specifications and procedures for lubrication.
* **Ignition Starting Charging:** Comprehensive coverage of the ignition, starting, and charging systems.
* **Auto Transmission Clutch:** Information on automatic transmissions and clutches.
* **Manual Transmission:** Detailed coverage of manual transmissions.
* **Transfer Propeller Shaft:** Information on transfer cases, propeller shafts, and drive shafts.
* **Differential:** Understanding and servicing the differential.
* **Axle Suspension:** Guidance on the axles and suspension system.
* **Tire & Wheel:** Information on tires, wheels, and wheel maintenance.
* **Brake Control:** Detailed information on the brake control system.
* **Brake:** Comprehensive coverage of the brake system, including components, troubleshooting, and repair.
* **Parking Brake:** Information on the parking brake system.
* **Steering Column:** Understanding and repairing the steering column.
* **Power Steering:** Information on power steering systems.
* **Air Condition:** Details on the air conditioning system.
* **Suppl Restraint System:** Information on the supplemental restraint system (airbags).
* **Seat Belt:** Guidance on seat belts.
* **Engine Immobilizer:** Understanding and working with the engine immobilizer system.
* **Cruise Control:** Information on the cruise control system.
* **Wiper & Washer:** Details on the windshield wiper and washer systems.
* **Door Lock:** Understanding and repairing door lock mechanisms.
* **Meter Audio/Visual:** Information on the instrument cluster and audio/visual systems.
* **Horn:** Information on the horn.
* **Windshield/Glass Mirror:** Details on the windshield, glass, and mirrors.
* **Instrument Panel:** Information on the instrument panel.
* **Seat:** Guidance on seats and seat adjustments.
* **Engine Hood/ Door:** Information on the engine hood and doors.
* **Exterior & Interior:** Details on the exterior and interior of the car.
* **Electrical:** Comprehensive coverage of the electrical system, including wiring diagrams and troubleshooting.
* **Multiplex/ Can Communication:** Information on multiplex and CAN communication systems.

This manual is a valuable resource for anyone who wants to keep their BMW 3 Series E21 in top condition. It provides all the information you need to perform most service and repair tasks yourself, saving you money and giving you a deeper understanding of your vehicle.

The BMW 3 Series E21, produced from 1975 to 1983, marked the beginning of the iconic 3 Series lineage. This compact executive car was the first generation of the BMW 3 Series and revolutionized the brand's image, transitioning from a maker of luxury sedans to a strong competitor in the sporty compact segment. The E21 was a significant departure from BMW's previous models, sporting a new, more aerodynamic design with a shorter wheelbase and a more compact overall form. The E21's design was penned by prolific automotive designer Paul Bracq, who was responsible for shaping many iconic French and German automobiles. While the E21 was a radical departure from its predecessor, it retained the core values of BMW: driving pleasure, agility, and a focus on handling. The E21's success was underpinned by a range of four-cylinder engines, with displacements ranging from 1.6 liters to 2.3 liters, offering a balance of performance and fuel efficiency.

The E21's legacy goes beyond its innovative design and driving dynamics. It established the 3 Series as a symbol of sportiness and performance, a reputation that continues to this day. The E21 also introduced many features that would become staples of the 3 Series, including the now-famous "Hofmeister kink" in the rear window, a design element that has become synonymous with BMW. The E21 was also the first 3 Series to be offered with a diesel engine, a move that further expanded the car's appeal and broadened its market reach. Today, the E21 is celebrated as a classic BMW, appreciated by enthusiasts for its timeless design, driving experience, and its historical significance as the first generation of one of the most popular and influential car series in the world. The E21 remains a desirable and sought-after collectible car, with its enduring appeal reflecting its impact on the automotive landscape.