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BMW 520 520i 1988 Best Service Repair Manual

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🏷️ 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)...
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BMW 520 520i 1988 Best Service Repair Manual
🏷️ 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, rocker panels).
Common Issues
M20 Engine Quirks:
Oil leaks from rear main seal and valve cover gasket, timing belt maintenance is critical, potential for head gasket failure if overheated.
📚 Vehicle History
Brand Heritage
Bmw Legacy:
BMW has a long-standing reputation for producing driver-focused, high-performance vehicles with excellent build quality and engineering.
Model Evolution
E34 Introduction:
The E34 generation of the 5 Series was introduced in 1987 as a successor to the E28, bringing a more modern design, improved aerodynamics, and advanced engineering.
E34 Significance:
The E34 marked a significant step forward for BMW, establishing the design language and technological foundation for subsequent generations of the 5 Series.
Production
Production Years:
E34: 1987–1996
Manufacturing Locations:
Germany (Dingolfing), South Africa, and assembly operations in other countries.
🏆 Awards & Recognition
Recognitions
Design Awards:
The E34 generation received critical acclaim for its design and engineering from automotive journalists worldwide, contributing to BMW's reputation for sporting luxury.
Ratings
Reliability Perception:
Generally perceived as a robust and reliable vehicle when properly maintained, though specific components can require attention due to age.
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