This comprehensive service and repair manual is specifically designed for the 1984 BMW 3-series (E21) model. It provides detailed instructions, diagrams, illustrations, wiring schematics, and specifications to assist you with all aspects of maintenance, servicing, diagnosis, and repair. This manual is identical to the one used by technicians at authorized dealerships, ensuring you receive accurate and professional information.

The manual covers a vast array of topics, including:

* **Maintenance:** Covers regular maintenance procedures like oil changes, filter replacements, and fluid checks.
* **Engine:** Provides in-depth information on engine components, operation, troubleshooting, and repair.
* **Control System:** Includes detailed explanations of the engine control system, its functions, and how to diagnose and resolve problems.
* **Mechanical:** Offers guidance on the mechanical systems of the vehicle, including suspension, steering, brakes, and transmission.
* **Fuel Service Specifications:** Provides detailed specifications for fuel system components and procedures.
* **Emission Control:** Explains the emission control system, its operation, and how to maintain and repair it.
* **Intake Exhaust Cooling:** Covers the intake and exhaust systems, including cooling mechanisms and troubleshooting.
* **Lube:** Provides information on lubrication systems, types of lubricants, and maintenance procedures.
* **Ignition Starting Charging:** Covers the ignition system, starting system, charging system, and related components.
* **Automatic Transmission Clutch:** Provides detailed information on the automatic transmission, clutch operation, and repair procedures.
* **Manual Transmission:** Covers the manual transmission, its components, operation, and troubleshooting.
* **Transfer Propeller Shaft:** Provides information on the transfer case, propeller shaft, and related components.
* **Drive Shaft:** Covers the drive shaft, its components, and maintenance procedures.
* **Differential:** Explains the differential, its operation, and troubleshooting.
* **Axle Suspension:** Provides detailed information on the axle and suspension systems.
* **Tire & Wheel:** Covers tire and wheel maintenance, selection, and repair.
* **Brake Control:** Explains the brake control system and its operation.
* **Brake:** Covers the brake system, its components, and repair procedures.
* **Parking Brake:** Provides information on the parking brake system and its operation.
* **Steering Column:** Explains the steering column, its components, and troubleshooting.
* **Power Steering:** Covers the power steering system and its components.
* **Air Condition:** Provides information on the air conditioning system, its operation, and maintenance.
* **Supplemental Restraint System:** Explains the supplemental restraint system (SRS) and its components.
* **Seat Belt:** Covers the seat belt system, its operation, and maintenance.
* **Engine Immobilizer:** Provides information on the engine immobilizer system.
* **Cruise Control:** Explains the cruise control system and its operation.
* **Wiper & Washer:** Covers the wiper and washer system and its components.
* **Door Lock:** Provides information on the door lock system, its operation, and troubleshooting.
* **Meter Audio/Visual:** Explains the instrument panel, gauges, and other audio/visual systems.
* **Horn:** Covers the horn system and its operation.
* **Windshield/Glass Mirror:** Provides information on the windshield, glass, and mirror systems.
* **Instrument Panel:** Explains the instrument panel and its components.
* **Seat:** Covers the seat system, its components, and adjustment procedures.
* **Engine Hood/ Door:** Provides information on the engine hood, doors, and related components.
* **Exterior & Interior:** Covers the vehicle's exterior and interior components.
* **Electrical:** Provides detailed information on the vehicle's electrical system, including wiring diagrams.
* **Multiplex/ Can Communication:** Explains the multiplex and CAN communication systems used in the vehicle.

This manual provides all the information you need to effectively maintain, service, diagnose, and repair your 1984 BMW 3-series (E21).

The BMW 3-Series (E21) was the first generation of the iconic 3-Series model line, a range of compact executive cars that would go on to define the brand for decades to come. Introduced in 1975, the E21 was a significant departure from the previous "Neue Klasse" sedans, offering a more streamlined and sporty design. The E21's success was largely attributed to its well-balanced handling, thanks to a rear-wheel drive layout and a sophisticated suspension system. The car's lightweight construction and efficient engines made it a joy to drive, especially on winding roads. Initially, the E21 was available with a range of four-cylinder engines, starting with the 1.6-liter unit in the 316 and culminating in the more potent 2.3-liter unit in the 323i.

The 1984 model year marked the final year of production for the E21, with the introduction of the E30 3-Series in 1982 gradually phasing out its predecessor. Despite being a comparatively small and simple car compared to its modern successors, the E21 was a seminal model that established the 3-Series' reputation as a benchmark for driving dynamics and performance. While the 1984 model year continued to offer the familiar lineup of four-cylinder engines, it also marked the availability of the legendary M1 engine in the 323i, making it the most potent variant of the E21. The 1984 model year also saw the introduction of some minor cosmetic updates, including revised bumpers and taillights. The E21's enduring legacy lies not just in its historical significance, but also in its timeless appeal and the enduring passion of its devoted owners, making the 1984 model a sought-after classic among car enthusiasts.