🏷️ Basic Information Identification Make: BMW Model: 5 Series Model Variant: 520i Chassis Code: E34 Product Name: BMW 520I E34 Service Repair Manual 1988-1991 👋 Introduction Market Position Vehicle Segment: Executive/Luxury Sedan Target Audience: Enthusiasts, DIY mechanics, independent repair shops Competitive Analysis Competitors: Mercedes-Benz W124 E-Class, Audi 100/200, Jaguar XJ6 Key Features Vehicle Strengths: Driving dynamics, build quality, luxurious interior, advanced engineering for its era Manual Benefit: Empowers owners to perform repairs and maintenance, saving significant costs and ensuring vehicle longevity 📋 Manual Details Coverage Areas Covered Years: 1988, 1989, 1990, 1991 Covered Models: BMW 520i (E34) Page Count Estimated Pages: Variable (typically 1000+ pages for comprehensive manuals) Manual Type Type: Factory-type Service Repair Workshop Manual Language Language: English Format Format: PDF (Digital Download) 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, diagnosis, tuning, fuel injection, ignition, cooling, lubrication Transmission: Manual and automatic transmission repair, fluid services, torque converter Drivetrain: Driveshafts, differential, wheel bearings, axle shafts Suspension: Front and rear suspension components, shock absorbers, springs, control arms, bushings Steering: Steering rack, power steering pump, steering column, tie rods Brakes: Front and rear brake systems, ABS, brake fluid, rotors, pads, calipers Electrical: Wiring diagrams, fuse box layouts, lighting, starting, charging, ECU diagnostics, sensors Bodywork: Body panel repair, door mechanisms, glass replacement, interior trim, bumpers HVAC: Heating, ventilation, and air conditioning system diagnosis and repair Fuel System: Fuel pump, injectors, fuel lines, fuel tank, evaporative emissions control Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, spark plug replacement, fluid checks Diagnostics: Troubleshooting guides, symptom-based diagnostics, electrical system testing Repair: Step-by-step repair instructions for all major components and systems Overhaul: Engine and transmission rebuild procedures Replacement: Component replacement guides (e.g., water pump, alternator, starter) Adjustment: Valve adjustments, throttle body synchronization (where applicable) Technical Depth Depth: Comprehensive: From basic maintenance to complex diagnostics and full rebuilds 📊 Manual Specifications File Format Quality: High-resolution, clear text and diagrams, searchable Printability: Printable pages for workshop use Binding Type Digital: N/A (Digital PDF) Paper Type Digital: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Code: M20B20 Engine Type: Inline 6-cylinder, SOHC Displacement: 2.0 Liters (1990 cc) Performance Horsepower: 129 hp @ 5800 rpm (approximate, depending on market and specific version) Torque: 174 Nm (128 lb-ft) @ 4300 rpm (approximate) Fuel System Fuel Delivery: Bosch Motronic Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline Engine Features Bore X Stroke: 80.0 mm x 66.0 mm Compression Ratio: 8.8:1 (approximate) 🔧 Transmission Standard Type: 5-speed Manual Transmission Optional Type: 4-speed Automatic Transmission (ZF 4HP22) Features Manual Gear Ratios: Refer to manual for specific ratios (e.g., 3.71, 2.25, 1.42, 1.00, 0.80 for Getrag 260) Fluid Specifications Manual Transmission Fluid: BMW MTF LT-2 or equivalent (e.g., Pentosin MTF 2, Castrol Syntrans B75) Automatic Transmission Fluid: Dexron III or equivalent (e.g., Pentosin ATF1) 📐 Dimensions Exterior Length: 4734 mm (186.4 in) Width: 1751 mm (68.9 in) Height: 1412 mm (55.6 in) Wheelbase: 2761 mm (108.7 in) Weights Curb Weight: 1400-1500 kg (approximate) 🛡️ Safety Features Ratings Crash Test Performance: Good for its era, advanced safety cage and crumple zones; specific ratings not typically available in consumer databases for this model year Active Features ABS: Available (Teves Mk II or ABS II) Passive Features Airbags: Driver's airbag available as an option Seatbelts: Three-point inertia-reel seatbelts front and rear 💡 Technology Features Infotainment Radio Options: Cassette player with optional CD changer, analog radio tuning Driver Assistance Cruise Control: Standard or optional depending on trim Connectivity Oem Features: On-Board Computer (OBC) for trip data and system checks 🔧 Maintenance Service Intervals Oil Change Interval: Typically 10,000-15,000 miles or 12-24 months (refer to manual for specific conditions) Spark Plug Replacement: Approx. 30,000-60,000 miles (depending on plug type) Coolant Flush: Every 2-4 years or 30,000-50,000 miles Fluid Specifications Engine Oil: BMW High Performance SAE 5W-30 Synthetic (or equivalent like Castrol Edge 5W-30) Coolant: BMW Blue Antifreeze/Coolant (G48) or equivalent Brake Fluid: DOT 4 Known Issues Common Problems: Headliner sagging, cooling system leaks (water pump, hoses), VANOS issues (on later models/variants, less common on early 2.0L), ABS sensor failures, OBC pixelation, window regulator failures 📚 Vehicle History Brand Heritage Bmw Philosophy: Sheer Driving Pleasure, focus on performance, handling, and driver engagement Model Evolution E34 Introduction: Launched in 1987 (as a 1988 model year), replacing the E28 5 Series E34 Design: Designed by Ercole Spada and Claus Luthe, known for its aerodynamic efficiency and timeless styling Production Production Period: 1987-1996 (E34 generation) 🏆 Awards & Recognition Recognitions Automotive Press: Consistently praised by automotive press for its handling, ride comfort, and build quality Ratings Reliability Perception: Generally good reliability for the era, though requires diligent maintenance to remain so