This comprehensive service and repair manual for the BMW 8-series E31, covering the 1990 model year, provides the same detailed information used by technicians at BMW dealerships. This manual is your go-to resource for maintaining, servicing, diagnosing, and repairing your vehicle.

The manual offers step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications to guide you through every repair process. It covers a vast range of topics, including:

* **Maintenance:** Routine maintenance procedures, schedules, and tips for keeping your BMW in optimal condition.
* **Engine:** Detailed information on engine components, operation, troubleshooting, and repair procedures.
* **Control System:** Comprehensive coverage of the engine control system, including sensors, actuators, and electronic components.
* **Mechanical:** Complete descriptions of the vehicle's mechanical systems, including transmission, suspension, brakes, and steering.
* **Fuel Service Specifications:** Detailed information on fuel system components, specifications, and troubleshooting.
* **Emission Control:** Explanations of the emission control system, including components, operation, and diagnostics.
* **Intake Exhaust Cooling:** Thorough coverage of intake and exhaust systems, cooling systems, and related components.
* **Lube:** Lubrication specifications and recommendations for various vehicle components.
* **Ignition Starting Charging:** Information on the ignition system, starting system, and charging system.
* **Auto Transmission Clutch:** Detailed explanations of the automatic transmission, clutch system, and related components.
* **Manual Transmission:** Comprehensive coverage of the manual transmission system.
* **Transfer Propeller Shaft:** Information on the transfer case, propeller shaft, and related components.
* **Drive Shaft:** Explanations of the drive shaft system and components.
* **Differential:** Detailed descriptions of the differential system and components.
* **Axle Suspension:** Comprehensive coverage of the axle and suspension systems, including components and repair procedures.
* **Tire & Wheel:** Specifications, recommendations, and maintenance procedures for tires and wheels.
* **Brake Control:** Information on the brake control system, including components and operation.
* **Brake:** Detailed explanations of the brake system, including components, maintenance, and repair procedures.
* **Parking Brake:** Coverage of the parking brake system, components, and operation.
* **Steering Column:** Detailed information on the steering column, including components and repair procedures.
* **Power Steering:** Explanations of the power steering system, including components and troubleshooting.
* **Air Condition:** Comprehensive coverage of the air conditioning system, including components, operation, and repair.
* **Suppl Restraint System:** Information on the supplemental restraint system (airbags), including components and operation.
* **Seat Belt:** Detailed explanations of the seat belt system, including components and maintenance.
* **Engine Immobilizer:** Coverage of the engine immobilizer system and its operation.
* **Cruise Control:** Information on the cruise control system, including components and operation.
* **Wiper & Washer:** Detailed explanations of the wiper and washer system, including components and repair procedures.
* **Door Lock:** Information on door lock systems, including components and operation.
* **Meter Audio/Visual:** Coverage of the instrument cluster, audio system, and visual display components.
* **Horn:** Information on the horn system, including components and operation.
* **Windshield/Glass Mirror:** Explanations of the windshield, glass, and mirror systems, including replacement procedures.
* **Instrument Panel:** Detailed information on the instrument panel, including components and repair procedures.
* **Seat:** Comprehensive coverage of the seat system, including components, adjustment, and repair procedures.
* **Engine Hood/ Door:** Information on the engine hood and door systems, including components and operation.
* **Exterior & Interior:** Details on the exterior and interior components of the vehicle, including trim, lighting, and upholstery.
* **Electrical:** Comprehensive coverage of the electrical system, including wiring diagrams, components, and troubleshooting procedures.
* **Multiplex/ Can Communication:** Explanations of the vehicle's multiplex and CAN communication systems.

With this manual, you can confidently tackle a wide range of repair and maintenance tasks, saving time and money. It's a valuable resource for any BMW 8-series E31 owner.

The BMW 8-series E31, launched in 1989 and produced until 1999, was a grand tourer that epitomized the pinnacle of BMW engineering and luxury at the time. This two-door coupe, designed by Claus Luthe, was a radical departure from the conservative styling of its predecessors, featuring a sleek, aerodynamic body with a low-slung profile and distinctive "sharknose" front end. The E31 showcased advanced technology for its era, including a lightweight aluminum chassis, powerful V8 and V12 engines, and a sophisticated suspension system, providing an exhilarating driving experience. While not a commercial success due to its high price tag, the 8-series garnered critical acclaim for its performance, handling, and luxurious interior appointments. It cemented BMW's reputation as a manufacturer of premium, high-performance automobiles, and remains a highly sought-after collectible among automotive enthusiasts today.

The E31 8-series offered a range of powerful engines, starting with the 840Ci equipped with a 4.0-liter V8 engine generating 282 horsepower. The 850i, however, was the true star, boasting a 5.0-liter V12 engine capable of producing 322 horsepower, propelling the car to a top speed of 155 mph. For the discerning driver, the 850i also offered an optional 6-speed manual transmission, a rare feature in luxury grand tourers at the time. The E31 featured a luxurious interior crafted with premium materials such as leather, wood, and brushed aluminum. It offered a generous amount of space for both driver and passenger, with a comfortable and well-appointed cabin. The 8-series also featured a comprehensive suite of standard equipment, including power windows, power seats, climate control, and a high-quality stereo system. The 8-series E31, with its striking design, potent performance, and luxurious appointments, still holds a special place in the hearts of car enthusiasts as a timeless classic and a testament to BMW's engineering brilliance.