🏷️ Basic Information Identification Make: BMW Model: 5 Series Chassis Code: E34 Model Variant: 520i Production Years Covered: 1988-1991 👋 Introduction Market Position Era Positioning: Represents a high-quality, driver-focused luxury sedan of its era, known for engineering and performance. Target Audience: Owners seeking to maintain, repair, or restore their E34 520i with genuine technical accuracy. Competitive Analysis Key Competitors: Mercedes-Benz W124 E-Class, Audi V8 Quattro, Lexus LS 400 (later in generation) Key Features Vehicle Philosophy: Emphasis on driving dynamics, build quality, and technological integration typical of BMW's 'Ultimate Driving Machine' ethos. Manual Value Proposition: A comprehensive and complete resource, avoiding the pitfalls of incomplete or inaccurate aftermarket guides. 📋 Manual Details Coverage Areas Engine Coverage: M20B20 (2.0L Inline-6) Transmission Coverage: 4-speed automatic (e.g., A4S 310R), 5-speed manual Electrical System Coverage: Comprehensive wiring diagrams, ECU functions, sensor diagnostics Chassis And Body Coverage: Suspension, steering, brakes, body panels, interior trim Page Count Estimated Page Count: Over 1500 (typical for comprehensive E34 manuals) Manual Type Manual Type: Workshop Service & Repair Manual Language Language: English Format Format: Digital (likely PDF, verifiable upon purchase) 📖 Manual Coverage Systems Covered Powertrain: Engine (M20), fuel injection (Bosch Motronic), exhaust, cooling, lubrication Drivetrain: Clutch, gearbox (manual/automatic), driveshafts, differential, axle assemblies Suspension And Steering: Front struts, rear multi-link suspension, power steering system, steering rack Brakes: Front vented discs, rear solid discs, ABS (Anti-lock Braking System), parking brake Electrical: Battery, charging system, ignition, lighting, instrumentation, power accessories, diagnostics Climate Control: HVAC system, air conditioning, heater core, blower motor, controls Body And Trim: Body panel removal/installation, interior trim components, glass, seals Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, fluid checks, belt inspections Engine Repair: Head gasket replacement, valve adjustments, timing belt/chain service, component overhauls Transmission Service: Fluid and filter changes (auto/manual), clutch replacement, gearbox internal repairs Brake System Overhaul: Pad and rotor replacement, caliper rebuild, brake line repair, bleeding procedures Electrical Diagnostics: Troubleshooting electrical faults using wiring diagrams, component testing, sensor analysis Suspension And Steering Repair: Component replacement (shocks, springs, bushings), alignment specifications, power steering system repair Troubleshooting Guides: Systematic fault diagnosis for common and uncommon issues, diagnostic trouble codes (DTCs) Technical Depth Diagnostic Capabilities: Advanced diagnostic procedures, including use of specific BMW diagnostic tools (e.g., GT1 for later models, but principles apply) and interpreter methods. Rebuild Instructions: Detailed step-by-step instructions for engine and transmission rebuilds, including torque specifications and component clearances. Wiring Diagrams: High-quality, detailed wiring diagrams for all vehicle systems, color-coded for clarity. Specification Tables: Extensive tables of torque values, fluid capacities, tolerances, and electrical values. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text for quick information retrieval Print Quality: High-resolution, printable pages Binding Type Binding Type: N/A (Digital format) Paper Type Paper Type: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Code: M20B20 Configuration: 2.0L (1990 cc) SOHC Inline-6 Performance Horsepower Rated: Approx. 129 hp (95 kW) at 6000 rpm Torque Rated: Approx. 134 lb-ft (182 Nm) at 4300 rpm Fuel System Fuel Delivery: Bosch Motronic electronic fuel injection (e.g., Motronic 1.3) Fuel Type: Unleaded gasoline (Octane rating 91 or higher recommended) Cooling System Coolant Capacity: Approx. 8.5 Liters (with heater) Thermostat Rating: Typically 88-91°C Lubrication Oil Type: API SG or higher, SAE 5W-30, 5W-40, 10W-30, or 10W-40 (depending on climate) Oil Capacity: Approx. 4.5 Liters (with filter change) Ignition System Spark Plugs: Bosch WR8DC+ or equivalent (check manual for exact spec) 🔧 Transmission Standard Standard Transmission: 5-speed manual Optional Optional Transmission: 4-speed automatic (e.g., A4S 310R) Features Automatic Features: Selectable modes (e.g., Economy/Sport), torque converter lock-up Fluid Specifications Manual Transmission Fluid: GL-4 SAE 75W-90 synthetic gear oil Automatic Transmission Fluid: Dexron III or equivalent (e.g., ATF LT 71141 for some variants) 📐 Dimensions Exterior Length: Approx. 4730 mm (186.2 in) Width: Approx. 1751 mm (68.9 in) Height: Approx. 1380 mm (54.3 in) Wheelbase: Approx. 2760 mm (108.7 in) Weights Curb Weight: Approx. 1440 kg (3175 lbs) for manual transmission 🛡️ Safety Features Ratings Crash Test Performance: Good structural integrity for its era, though modern safety standards differ significantly. Active Features ABS: Standard on most 520i models of this period, providing anti-lock braking. Passive Features Airbags: Driver airbag optional or standard on later models within this range; passenger airbag less common. Seatbelts: 3-point inertia reel seatbelts front and rear 💡 Technology Features Infotainment Audio System: Original BMW Bavaria C or similar cassette/radio units; early CD options available on some models. Driver Assistance Cruise Control: Optional feature on many models. Connectivity Diagnostic Interface: OBD-I port or specific BMW diagnostic connectors (depending on exact year and market). 🔧 Maintenance Service Intervals Oil Change Interval: Typically 10,000-15,000 km or 12 months (refer to manual for specific recommendation based on oil type and driving conditions). Spark Plug Replacement: Approx. 40,000-60,000 km (depending on spark plug type) Transmission Fluid Change: Automatic: 60,000-80,000 km; Manual:...