This comprehensive service and repair manual for the BMW 3-series (E21) model year 1985 provides you with the exact same information used by technicians at dealerships to maintain, service, diagnose, and repair your vehicle. This manual covers all models and all repairs from A to Z, offering detailed step-by-step instructions, diagrams, illustrations, wiring schematics and specifications. The detailed information allows you to confidently perform a wide range of repairs, from basic maintenance to complex engine overhauls.

This manual is organized by system, covering everything from engine maintenance to electrical systems, ensuring you have the information you need at your fingertips. The manual includes sections on:

* **Maintenance:** This section covers regular maintenance procedures like oil changes, filter replacements, and fluid checks.
* **Engine:** Detailed information about the engine including, rebuilding, troubleshooting and repair.
* **Control System:** Comprehensive details on the electronic control systems that govern your vehicle's performance.
* **Mechanical:** Thorough explanations of the mechanical components of your vehicle, including the transmission, suspension, and brakes.
* **Fuel Service Specifications:** Accurate information about fuel system components and procedures for servicing and repair.
* **Emission Control:** Detailed information regarding emissions control systems, including diagnosis and repair procedures.
* **Intake Exhaust Cooling:** Explanation of the intake and exhaust systems, including cooling systems and related components.
* **Lube:** Guidance on lubrication systems, including recommended oils and greases.
* **Ignition Starting Charging:** Information about ignition, starting, and charging systems, including components and troubleshooting procedures.
* **Auto Transmission Clutch:** Detailed coverage of automatic transmission operation and repair.
* **Manual Transmission:** Information regarding manual transmission repair and maintenance.
* **Transfer Propeller Shaft:** Guidance on the transfer case, propeller shaft, and related components.
* **Drive Shaft:** Information on drive shafts and their maintenance.
* **Differential:** Details on differential operation and repair.
* **Axle Suspension:** Explanation of the axle and suspension systems, including diagnosis and repair procedures.
* **Tire & Wheel:** Information on tire and wheel maintenance and repair.
* **Brake Control:** Details on brake control systems, including components and troubleshooting procedures.
* **Brake:** Thorough explanations of brake systems, including repair and maintenance.
* **Parking Brake:** Information about parking brake systems and related components.
* **Steering Column:** Coverage of steering column systems, including repair and maintenance.
* **Power Steering:** Details on power steering systems, including diagnosis and repair procedures.
* **Air Condition:** Information on air conditioning systems and related components.
* **Suppl Restraint System:** Explanation of supplemental restraint systems, including airbags and seatbelts.
* **Seat Belt:** Details on seatbelt systems and related components.
* **Engine Immobilizer:** Information on engine immobilizer systems and their operation.
* **Cruise Control:** Details on cruise control systems, including components and troubleshooting procedures.
* **Wiper & Washer:** Coverage of wiper and washer systems, including repair and maintenance.
* **Door Lock:** Information on door lock systems, including diagnosis and repair procedures.
* **Meter Audio/Visual:** Explanation of instrument panels, gauges, and warning systems.
* **Horn:** Information regarding horn systems.
* **Windshield/Glass Mirror:** Details on windshield, glass, and mirror systems.
* **Instrument Panel:** Coverage of the instrument panel, including gauges and controls.
* **Seat:** Information on seat systems, including adjustments and repair.
* **Engine Hood/ Door:** Details on engine hood and door systems.
* **Exterior & Interior:** Guidance on exterior and interior components, including maintenance and repair.
* **Electrical:** Thorough explanations of the electrical system, including wiring diagrams and diagnostic procedures.
* **Multiplex/ Can Communication:** Information on multiplex and CAN communication systems, including diagnosis and repair procedures.

This comprehensive manual is compatible with all versions of Windows and Mac, allowing you to access the information you need on your computer. Print out the pages you need to take with you into the garage or workshop for easy reference.

The BMW 3 Series (E21) is a compact executive car that was produced by BMW from 1975 to 1983. It was the first generation of the BMW 3 Series, and it was a groundbreaking car for the brand. The E21 was a departure from the previous BMW 02 Series, which was a larger and more luxurious car. The E21 was smaller, more agile, and more focused on performance. It was also the first BMW to feature a 4-cylinder engine, which was a major innovation at the time. The E21 was a huge success for BMW, and it helped to establish the 3 Series as one of the most popular and respected car lines in the world.

The 1985 Service and Repair Manual for the BMW 3 Series (E21) is an essential resource for anyone who owns or works on this classic car. The manual provides detailed information on every aspect of the vehicle's operation, including engine, transmission, suspension, brakes, electrical systems, and more. It features clear and concise instructions, along with numerous illustrations and diagrams. It is a comprehensive guide to maintaining and repairing the E21, and it can help to ensure that your car is running smoothly and safely for many years to come. The manual covers both the gasoline and diesel engine models, including the 316, 318, 320, and 323i, as well as the 320D. It details procedures for routine maintenance, such as oil changes, filter replacements, and tune-ups. In addition, the manual covers more complex repairs, such as engine overhauls, transmission replacements, and suspension repairs. With its detailed information, the manual is an invaluable tool for any owner of a 1985 BMW 3 Series (E21) and a valuable resource for anyone working on these vehicles.