🏷️ Basic Information Identification Make: BMW Model: 520i Product Name: BMW 520i 1988-1991 Service Repair Workshop Manual Codes Chassis Code: E34 👋 Introduction Market Position Positioning: The BMW 520i (E34) was positioned as a premium mid-size luxury sedan, offering a blend of performance, comfort, and sophisticated engineering. Competitive Analysis Competitors: Competed with other luxury sedans of its era, such as the Mercedes-Benz W124 E-Class, Audi 100/200, and Jaguar XJ. Key Features Design Philosophy: Emphasized BMW's 'Ultimate Driving Machine' ethos with a focus on handling, driver engagement, and build quality. Technology Intro: Introduced advanced features for its time, including optional ABS, onboard computer, and improved aerodynamics. 📋 Manual Details Coverage Areas Years Covered: 1988, 1989, 1990, 1991 Page Count Estimated Pages: Varies (typically 500-1000+ pages for comprehensive E34 manuals) Manual Type Type: Service and Repair Workshop Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Engine: M20B20 2.0L inline-6, Engine Mechanical, Fuel System, Ignition System, Engine Management (DME) Transmission: Getrag 260 5-speed Manual, ZF 4HP22 4-speed Automatic Transmission Drivetrain: Rear Wheel Drive (RWD), Driveshafts, Differential, Axles Suspension: Front MacPherson Struts, Rear Multi-link Suspension, Springs, Dampers, Bushings Steering: Hydraulic Power Steering System, Steering Rack, Column Brakes: Front Ventilated Discs, Rear Solid Discs, ABS (Anti-lock Braking System) System, Brake Hydraulics, Parking Brake Electrical: Battery, Alternator, Starter Motor, Lighting System, Fuses, Relays, Wiring Diagrams, Instrument Cluster, Wiper/Washer System, Horn Body And Chassis: Body Panels, Doors, Hood, Trunk, Bumpers, Glass, Interior Trim, Underbody Coatings HVAC: Heating, Ventilation, Air Conditioning (Manual Climate Control) Fuel System: Fuel Tank, Fuel Pump, Fuel Injectors, Fuel Lines, Fuel Filter Cooling System: Radiator, Water Pump, Thermostat, Coolant Hoses, Expansion Tank Procedures Included Maintenance: Routine Maintenance Checks, Oil Changes, Filter Replacements, Spark Plug Replacement, Belt Adjustments Troubleshooting: Diagnostic Procedures, Fault Code Interpretation, Common Problems and Solutions Repair: Component Removal and Installation, Reassembly Procedures, Torque Specifications Diagnostics: Engine Diagnostics, Electrical System Diagnostics, ABS Diagnostics Overhaul Rebuild: Engine Overhaul, Transmission Rebuild (detailed steps) Adjustments: Valve Clearance Adjustments (if applicable), Idle Speed Adjustments, Clutch Adjustment Specifications: Torque Values, Clearances, Fluid Capacities, Electrical Resistances Body Repair: Panel alignment, rust repair techniques, door mechanisms, glass replacement. HVAC Repair: Blower motor replacement, heater core service, AC system service (refrigerant, compressor). Technical Depth Depth: Comprehensive: Covers basic maintenance to full engine and transmission rebuilds, including detailed diagnostics and wiring diagrams. 📊 Manual Specifications File Format PDF Quality: High Resolution, Searchable Text, Printable Pages Print Quality Print Readability: Clear diagrams and text for easy interpretation by technicians. Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code: M20B20 Engine Type: Inline 6-cylinder, SOHC (Single Overhead Camshaft) Displacement: 1990 cc (2.0 Liters) Bore X Stroke: 80.0 mm x 66.0 mm Compression Ratio: 8.8:1 or 9.0:1 (depending on market) Performance Horsepower Ps: 129 PS (approx. 127 hp) @ 5800 rpm Torque Nm: 174 Nm (approx. 128 lb-ft) @ 4500 rpm Fuel System Fuel Delivery: Bosch Motronic Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline (RON 95 recommended) Cooling System Coolant Capacity: Approx. 7.5 Liters 🔧 Transmission Standard Transmission Type: Getrag 260 5-Speed Manual Optional Transmission Type: ZF 4HP22 4-Speed Automatic Features Clutch Type: Hydraulically Actuated Single Dry Plate Clutch (Manual) Fluid Specifications Manual Transmission Fluid: BMW recommends MTF LT-2 or equivalent (API GL-4, SAE 75W-90) Automatic Transmission Fluid: Dexron III or equivalent 📐 Dimensions Exterior Length: 4730 mm (186.2 in) Width: 1751 mm (68.9 in) Height: 1410 mm (55.5 in) Wheelbase: 2760 mm (108.7 in) Weights Curb Weight: Approx. 1450 kg (3197 lbs) Gross Vehicle Weight: Approx. 1950 kg (4300 lbs) Interior Seating Capacity: 5 Cargo Trunk Volume: Approx. 460 Liters (16.2 cu ft) 🛡️ Safety Features Ratings Crash Test Era: Older models often lack standardized ratings like NHTSA/Euro NCAP, but were built to robust European standards of the time. Active Features ABS: Optional Bosch ABS (Anti-lock Braking System) Traction Control: Not typically available on the 520i model. Passive Features Airbags: Driver's airbag was an option and became more common in later E34 models, but not standard on early 520i. Seatbelts: Three-point inertia-reel seatbelts front and rear. Body Structure: Reinforced passenger safety cell, energy-absorbing crumple zones. 💡 Technology Features Infotainment Audio System: Optional BMW Bavaria C or C Reverse cassette radio with amplifier system. Onboard Computer: Optional 'Check Control' system for monitoring fluid levels, lights, and basic vehicle status. Driver Assistance Cruise Control: Optional electronic cruise control. Connectivity Exterior Features: Aerodynamic styling, flush glass, power-adjustable mirrors, optional headlight washers. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 10,000-15,000 km (6,000-9,000 miles) or annually, depending on usage and oil quality. Air Filter Replacement: Every 30,000-50,000 km (18,000-30,000 miles) or as needed. Spark Plug Replacement: Every 50,000-100,000 km (30,000-60,000 miles) depending on plug type (standard vs. long-life). Coolant Flush: Every 2-4 years or 40,000-60,000 km (24,000-36,000 miles). Fluid...