🏷️ Basic Information Identification Make: BMW Model: 5 Series Model Variant: 520i Year: 1988 Codes Chassis Code: E34 👋 Introduction Market Position Era Positioning: Executive Sedan; represented BMW's entry into the mid-size luxury sedan market with a focus on driving dynamics and build quality. Competitive Analysis Competitors: Mercedes-Benz E-Class (W124), Audi 100/200, Jaguar XJ, Lexus LS400 (later in generation) Key Features Design Philosophy: Elegant, understated design with a driver-centric cockpit. Emphasis on aerodynamics and build integrity. Engineering Highlights: Sophisticated suspension geometry for superior handling, robust chassis, advanced (for the time) engine management. 📋 Manual Details Coverage Areas Primary Regions: Global (primarily Europe and North America) Specific Models: BMW 520i (E34 chassis) Page Count Estimated Pages: 500+ Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine (M20B20), Fuel System, Ignition System, Exhaust System, Transmission (Manual & Automatic) Chassis: Suspension (Front & Rear), Steering, Brakes (ABS), Drivetrain (RWD) Electrical: Wiring Diagrams, Lighting, Instrument Cluster, ECUs, Power Accessories Body: Body Panels, Doors, Windows, Seats, Interior Trim Procedures Included Maintenance: Oil Changes, Filter Replacements, Spark Plug Service, Belt Inspection/Replacement Repair: Engine Overhaul, Transmission Rebuild, Brake System Repair, Suspension Component Replacement, Electrical Diagnosis Diagnostics: Troubleshooting guides for common problems, fault code interpretation (where applicable for the era) Specifications: Torque values, clearances, fluid capacities, electrical resistance values Technical Depth Depth: Comprehensive; suitable for DIY enthusiasts and professional technicians. 📊 Manual Specifications File Format File Type: PDF Searchable: Yes (typically for factory PDFs) Print Quality Printability: High (allows printing of full manual or specific pages) Binding Type Binding Recommendation: Coil binding for lay-flat usability Paper Type Recommended Paper: Durable, heavyweight paper for workshop use ⚙️ Engine Specifications Primary Engine Engine Code: M20B20 Engine Type: Inline 6-cylinder, Naturally Aspirated Displacement: 1990 cc (2.0 Liters) Performance Horsepower: 129 hp @ 5800 rpm Torque: 174 Nm (128 lb-ft) @ 4300 rpm Fuel System Fuel Delivery: Bosch Motronic (MPI - Multi-Point Fuel Injection) Fuel Type: Unleaded Gasoline (Premium) Engine Management Ignition System: Electronic Ignition (Distributorless in later M20 versions, but likely distributor in early E34 520i) Emission Control: Catalytic Converter, Lambda Sensor (Oxygen Sensor) 🔧 Transmission Standard Transmission Type: Getrag 260 5-Speed Manual Optional Transmission Type: ZF 4HP22 4-Speed Automatic Features Drive Type: Rear Wheel Drive (RWD) Specifications Clutch Type: Hydraulically Actuated Single Dry Plate 📐 Dimensions Exterior Length: 4719 mm (185.8 in) Width: 1751 mm (68.9 in) Height: 1412 mm (55.6 in) Wheelbase: 2763 mm (108.8 in) Weights Curb Weight Manual: Approx. 1400 kg (3086 lbs) Curb Weight Automatic: Approx. 1440 kg (3175 lbs) Gross Vehicle Weight Rating: Approx. 1950 kg (4299 lbs) 🛡️ Safety Features Ratings Era Safety Standards: Conformed to European and US safety standards of the late 1980s. Lacked modern advanced safety features. Active Features ABS: Anti-lock Braking System (ABS) - Often optional or standard on higher trims, check VIN. Traction Control: Traction Control System (ASC/ASC+T) - Not commonly available on the 520i in 1988, more prevalent on later models/higher engines. Passive Features Airbags: Driver-side airbag - Often optional or standard on later production runs of the E34 generation. Seatbelts: Three-point inertia-reel seatbelts front and rear. Body Construction: Reinforced safety cell, energy-absorbing crumple zones. 💡 Technology Features Infotainment Audio System: Factory cassette player with optional CD changer preparation. Basic radio functions, often with manual tuning and balance/fader controls. Climate Control: Manual air conditioning and heating with adjustable fan speed and temperature. Automatic climate control (ECC) was an option on higher trims. Driver Assistance Cruise Control: Optional on most models, offering basic speed holding. Connectivity Original Connectivity: Limited to optional telephone integration systems, primarily analog. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000 - 7,500 miles (8,000 - 12,000 km) or annually, depending on driving conditions and oil used. The manual will provide specific recommendations based on BMW's service indicator system. Coolant Change Interval: Every 2 years or as recommended by BMW (check manual for exact interval and fluid type). Spark Plug Replacement: Refer to manual for specific type (e.g., copper, platinum) and interval, typically around 30,000 miles. Fluid Specifications Engine Oil Type: API SG or higher, viscosity 10W-40 or 15W-40 recommended. Consult manual for precise BMW specifications. Engine Oil Capacity: Approx. 4.5 Liters (4.8 US Quarts) with filter change. Coolant Type: Ethylene Glycol based antifreeze (BMW Blue or equivalent). Transmission Fluid Manual: API GL-4 or GL-5, SAE 75W-90 gear oil. Consult manual for specific recommendations. Transmission Fluid Automatic: Dexron II or equivalent. Refer to manual for exact BMW specification and capacity. Brake Fluid Type: DOT 3 or DOT 4. Known Issues Common Problems: Cooling system leaks (hoses, radiator, water pump), VANOS issues (on later M50 engines, not M20), fuel pump failure, ignition module failure, strut mount wear, door seal degradation, EML light (on some models with electronic throttle), rust (wheel arches,...