This comprehensive service and repair manual covers all models and aspects of the BMW 8-series E31, specifically for the 1991 model year. It provides the same detailed information used by technicians at BMW dealerships to maintain, service, diagnose, and repair your vehicle. This manual offers step-by-step instructions, accompanied by clear diagrams, illustrations, wiring schematics, and specifications, enabling you to confidently tackle any repair with ease. The manual covers a wide range of topics, including:

* **Maintenance**: Regular maintenance schedules and procedures to keep your 8-series running smoothly.
* **Engine**: In-depth coverage of engine components, including removal, installation, and troubleshooting.
* **Control System**: Detailed explanations of the engine control system, including sensors, actuators, and diagnostics.
* **Mechanical**: Comprehensive information on the vehicle's mechanical systems, covering everything from suspension and brakes to steering and transmission.
* **Fuel Service Specifications**: Exact specifications for fuel system components and procedures.
* **Emission Control**: Thorough information on the emissions control system, including diagnosis and repair.
* **Intake Exhaust Cooling**: Detailed explanations of the intake and exhaust systems, as well as cooling system components.
* **Lube**: Lubrication specifications and procedures for all critical components.
* **Ignition Starting Charging**: Comprehensive coverage of the ignition, starting, and charging systems.
* **Auto Transmission Clutch**: Detailed information on the automatic transmission, including clutch operation and maintenance.
* **Manual Transmission**: In-depth coverage of the manual transmission, including gear selection and repair procedures.
* **Transfer Propeller Shaft**: Complete coverage of the transfer case and propeller shaft.
* **Drive Shaft**: Detailed information on the drive shaft, including removal, installation, and inspection.
* **Differential**: Thorough explanations of the differential and its operation.
* **Axle Suspension**: Complete coverage of the axle and suspension systems, including alignment procedures.
* **Tire & Wheel**: Information on tire and wheel specifications, as well as maintenance and repair procedures.
* **Brake Control**: Detailed coverage of the brake control system, including ABS and other electronic systems.
* **Brake**: Comprehensive information on the braking system, including disc and drum brakes.
* **Parking Brake**: Detailed explanations of the parking brake system.
* **Steering Column**: In-depth coverage of the steering column, including removal, installation, and repair.
* **Power Steering**: Thorough information on the power steering system, including diagnosis and repair.
* **Air Condition**: Comprehensive explanations of the air conditioning system, including refrigerant charging and troubleshooting.
* **Suppl Restraint System**: Detailed explanations of the supplemental restraint system (airbags), including diagnosis and repair.
* **Seat Belt**: Complete coverage of the seat belt system, including inspection and adjustment.
* **Engine Immobilizer**: Thorough information on the engine immobilizer system.
* **Cruise Control**: Detailed explanations of the cruise control system, including operation and repair.
* **Wiper & Washer**: Comprehensive coverage of the wiper and washer systems.
* **Door Lock**: Detailed information on the door lock system, including operation and repair.
* **Meter Audio/Visual**: Thorough information on the dashboard instruments, audio system, and visual displays.
* **Horn**: Detailed explanations of the horn system, including diagnosis and repair.
* **Windshield/Glass Mirror**: Information on windshield, glass, and mirror replacement procedures.
* **Instrument Panel**: Complete coverage of the instrument panel, including removal, installation, and repair.
* **Seat**: Detailed information on the seat system, including adjustment, repair, and replacement.
* **Engine Hood/ Door**: Comprehensive coverage of the engine hood and door systems, including operation and repair.
* **Exterior & Interior**: Information on exterior and interior trim, including replacement and repair procedures.
* **Electrical**: Complete coverage of the vehicle's electrical system, including wiring diagrams and troubleshooting.
* **Multiplex/ Can Communication**: Detailed explanations of the vehicle's multiplex and CAN communication systems.

This manual provides you with the information you need to confidently maintain and repair your BMW 8-series E31, ensuring it continues to perform at its best.

The BMW 8 Series E31 is a luxury grand tourer that was produced by BMW from 1989 to 1999. It was the first BMW to be marketed as a true luxury car, aiming to compete directly with other high-end offerings like the Mercedes-Benz S-Class and the Jaguar XJ. The E31 was a groundbreaking model for BMW, introducing several innovative features and technology, including a lightweight aluminum body, a powerful V8 engine, and a sophisticated suspension system. The 8 Series was designed to be a luxurious and sporty car, offering a blend of performance and comfort that was unmatched at the time.

The 8 Series E31 was available in a variety of configurations, with both coupe and convertible body styles and a range of powerful V8 engines. The most notable variant was the 850i, equipped with a naturally aspirated 5.0-liter V8 engine producing 322 horsepower, propelling the car from 0 to 60 mph in just over 6 seconds. The 850i was later replaced by the 840ci, featuring a smaller, 4.4-liter engine, but still delivering impressive performance. The 8 Series also saw the introduction of the powerful 850CSi, a limited production model with a larger displacement engine and a multitude of performance upgrades. The E31 was renowned for its driving dynamics, boasting excellent handling and a comfortable ride. It was also praised for its luxurious interior, featuring high-quality materials and advanced features like a head-up display and navigation system. Despite its impressive features, however, the 8 Series E31 faced challenges in the market due to its high price and relatively low sales volume. Its production ended in 1999, making way for the new E65 generation 8 Series, which adopted a more traditional design language.