🏷️ Basic Information Identification Make: BMW Model: 850i Codes Chassis Code: E31 Engine Codes: M70B50 (early models) 👋 Introduction Market Position Segment: Luxury Grand Tourer (GT) Target Audience: Affluent buyers seeking high performance, advanced technology, and luxurious comfort Competitive Analysis Competitors: Ferrari 412, Porsche 928, Mercedes-Benz SL-Class (R129) Key Features Design Language: Iconic E31 design, long hood, short deck, pop-up headlights, pillarless hardtop coupe profile Engineering Philosophy: BMW's focus on driver engagement, sophisticated engineering, and robust build quality 📋 Manual Details Coverage Areas Years Covered: 1989, 1990, 1991, 1992, 1993, 1994 Page Count Estimated Page Count: 1000+ Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine overhaul, including cylinder head, pistons, crankshaft, camshafts, valve train, timing components Engine Management: Fuel injection (Bosch Motronic), ignition system, sensors, actuators, emissions control, ECU diagnostics Transmission Manual: Manual gearbox service, clutch, synchronizers, shift linkage Transmission Automatic: Automatic transmission (e.g., ZF 4HP24) service, torque converter, valve body, electronic control Suspension: Front and rear suspension components, struts, shocks, control arms, bushings, springs, anti-roll bars Brakes: Hydraulic brake system, ABS, front and rear brake pads and rotors, calipers, master cylinder, brake lines Steering: Power steering system, steering rack, tie rods, steering column Electrical System: Battery, alternator, starter, wiring diagrams, lighting, fuses, relays, comfort features Body And Chassis: Body panels, doors, hood, trunk, interior trim, structural components HVAC: Heating, ventilation, and air conditioning system service, refrigerant, compressor, evaporator, heater core Interior: Seats, dashboard, center console, headliner, sound insulation Procedures Included Maintenance: Oil change, filter replacement, spark plug replacement, coolant flush, brake fluid flush, belt inspection/replacement Diagnostics: Troubleshooting guides, fault code interpretation, systematic diagnostic procedures for all major systems Repair: Component removal and installation, major overhauls, component rebuilding Adjustment: Valve adjustment, idle speed adjustment, steering alignment specifications Wiring Diagrams: Comprehensive electrical schematics for all vehicle systems Technical Depth Depth: Complete factory-level repair and diagnostic information, suitable for professional technicians and advanced DIY enthusiasts 📊 Manual Specifications File Format File Type: Likely PDF Print Quality Readability: High resolution for clear text and diagrams Binding Type Binding: N/A (Digital format) Paper Type Paper Quality: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: V12 (M70) Displacement: 5.0 Liters (4988 cc) Performance Horsepower: 295 hp @ 5200 rpm Torque: 332 lb-ft @ 4100 rpm Fuel System Injection: Bosch Motronic M1.2 (early), M1.7 (later) multi-point fuel injection Fuel Type: Premium Unleaded Gasoline (91+ Octane) Engine Architecture Bore X Stroke: 84.0 mm x 90.0 mm Compression Ratio: 8.8:1 🔧 Transmission Standard Transmission Type: 6-speed manual (Getrag 630G) Optional Transmission Type: 4-speed automatic (ZF 4HP24) Features Drive Type: Rear-wheel drive (RWD) 📐 Dimensions Exterior Length: 191.1 inches (4854 mm) Width: 73.2 inches (1859 mm) Height: 52.5 inches (1333 mm) Wheelbase: 107.9 inches (2740 mm) Weights Curb Weight: 4300-4500 lbs (1950-2041 kg) depending on transmission 🛡️ Safety Features Ratings Crash Test Ratings: N/A (Vehicle not subjected to modern crash testing protocols of its era) Active Features ABS: Standard Anti-lock Braking System (ABS) Passive Features Airbags: Driver airbag standard from 1993 onwards Seatbelts: Three-point seatbelts with pretensioners 💡 Technology Features Infotainment Audio System: Optional premium sound systems, cassette player, basic digital displays Driver Assistance Cruise Control: Standard cruise control Connectivity Telematics: Limited connectivity for its era; basic onboard computer functions 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 - 10,000 miles (or as indicated by Condition Based Service) Spark Plug Replacement: Approximately every 30,000 miles Coolant Flush: Every 2-3 years or 30,000 miles Fluid Specifications Engine Oil: BMW High Performance SAE 5W-30 Synthetic (check manual for specific BMW LL-01 or LL-98 approval) Coolant: BMW Blue Antifreeze/Coolant (G48) or equivalent ethylene glycol-based coolant Brake Fluid: DOT 4 Automatic Transmission Fluid: ZF TE-ML 11A or equivalent (refer to manual for specific part number/type) Known Issues Common Problems: Ignition coil failure, fuel pump issues, cooling system leaks (radiator, hoses), idle control valve problems, ABS sensor failures, window regulator failures, door seal deterioration 📚 Vehicle History Brand Heritage Bmw Legacy: BMW's long history of producing driver-focused luxury and performance vehicles Model Evolution E31 Development: Developed as BMW's flagship coupe, emphasizing grand touring capabilities and advanced technology for its time Production Production Years: 1989-1999 (E31 platform) Manufacturing Location: Germany 🏆 Awards & Recognition Recognitions Car And Driver Ten Best: Ten Best in 1990 and 1991