🏷️ Basic Information

Make:

BMW

Model:

520i

Year:

1990

Chassis Code:

E34

Engine Code Group:

M50

👋 Introduction

Segment:

Executive Sedan

Positioning:

The BMW 5 Series (E34) represented BMW's commitment to sporty luxury, blending driving dynamics with comfort and refinement. The 520i was a key entry-level model in this premium segment.

Competitors:

Mercedes-Benz W124 E-Class (e.g., E200), Audi 100/A6 (C3/C4), Lexus ES250.

Handling:

Renowned for its balanced chassis, independent suspension, and rear-wheel-drive dynamics, offering a superior driving experience.

Build Quality:

Typical BMW build quality for the era, with a focus on durability and premium materials.

Engine Smoothness:

The M50 inline-six engine provided smooth power delivery and refined operation.

Design:

Classic E34 styling by Ercole Spada, characterized by clean lines, a purposeful stance, and BMW's signature kidney grille.

📋 Manual Details

Primary Coverage:

BMW 520i (E34) 1990 Model Year

Engine Coverage:

2.0L M50B20 Inline-6

Transmission Coverage:

4-Speed Automatic (A4S 310R) and 5-Speed Manual (Getrag 260/5)

Estimated Page Count:

700+

Type:

Full Service & Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine Mechanical:

Engine assembly, cylinder head, crankshaft, pistons, connecting rods, camshafts, timing, lubrication system, cooling system, fuel delivery system.

Engine Management:

Bosch Motronic M3.1/M3.3 engine management system, fuel injection, ignition system, sensors (MAF, O2, Crankshaft Position, Camshaft Position, Throttle Position), actuators.

Transmission Manual:

Clutch, gearbox components, shift mechanism, driveshafts, U-joints, differential (for manual variants).

Transmission Automatic:

Transmission fluid, torque converter, valve body, planetary gears, solenoids, electronic control unit (ECU) interface for automatic transmission.

Suspension:

Front struts, control arms, ball joints, tie rods, rear multi-link suspension, shock absorbers, springs, bushings.

Steering:

Power steering system, steering rack, pump, hoses, steering column, wheel alignment procedures.

Brakes:

Front and rear disc brakes, ABS (Anti-lock Braking System) components, brake lines, master cylinder, brake fluid, bleeding procedures, parking brake.

Electrical System:

Battery, alternator, starter motor, wiring diagrams, fuses, relays, lighting system (headlights, taillights, interior), horn, wipers, washer system.

Body And Chassis:

Body panel removal/installation, doors, hood, trunk, bumpers, interior trim, glass replacement, rust repair techniques.

HVAC:

Heating, ventilation, air conditioning (HVAC) system, compressor, refrigerant, blower motor, climate control panel, heater core, evaporator core.

Maintenance:

Oil and filter changes, spark plug replacement, air filter replacement, fuel filter replacement, coolant flush and refill, brake fluid flush, transmission fluid changes, differential fluid changes.

Diagnostics:

Troubleshooting guides for common issues, diagnostic trouble codes (DTCs) for engine management system, electrical system diagnostics, component testing procedures.

Repair:

Complete engine overhaul, cylinder head gasket replacement, piston ring replacement, valve adjustments, timing belt/chain replacement (if applicable), transmission rebuilds, brake caliper replacement, steering rack replacement, electrical component repair.

Rebuilding:

Detailed instructions for rebuilding major components like the engine, transmission, and differential.

Refurbishment:

Guidance on restoring worn or damaged parts, cosmetic repairs, and potential upgrades.

Restoration:

Comprehensive information for complete vehicle restoration projects, including historical context and correct procedures.

Depth:

Comprehensive: Covers everything from routine maintenance to complete engine and transmission overhauls, including in-depth diagnostic procedures and wiring diagrams.

📊 Manual Specifications

Searchability:

Searchable text content within the PDF for quick information retrieval.

Printability:

Printable pages for in-workshop use.

Image Resolution:

High-resolution diagrams, schematics, and photographs for clarity.

Binding:

N/A (Digital PDF)

Paper Quality:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Type:

Naturally Aspirated Inline-6 (M50B20)

Displacement:

1991 cc (2.0 Liters)

Bore X Stroke:

80.0 mm x 66.0 mm

Compression Ratio:

8.8:1

Valve Train:

DOHC, 4 valves per cylinder

Horsepower Net:

129 hp (95 kW) @ 5500 rpm

Torque Net:

180 Nm (133 lb-ft) @ 4300 rpm

Fuel Delivery:

Bosch Motronic M3.1/M3.3 Sequential Multi-Port Fuel Injection (MPI)

Fuel Type:

Unleaded Gasoline (91-95 RON recommended)

Ignition System:

Electronic Ignition with Knock Control

🔧 Transmission

Type:

5-Speed Manual (Getrag 260/5)

Type:

4-Speed Automatic (A4S 310R)

Clutch:

Hydraulically actuated single dry plate clutch (for manual).

Gear Ratios Manual:

1st: 4.23:1, 2nd: 2.52:1, 3rd: 1.68:1, 4th: 1.24:1, 5th: 1.00:1, Reverse: 3.71:1 (Typical for Getrag 260/5)

Gear Ratios Automatic:

1st: 2.48:1, 2nd: 1.48:1, 3rd: 1.00:1, 4th: 0.71:1, Reverse: 2.08:1 (Typical for A4S 310R)

Transmission Fluid Manual:

MTF-LT-2 or equivalent (e.g., GL-4 SAE 75W-90)

Transmission Fluid Automatic:

BMW ATF ETL-7045E or equivalent (e.g., Dexron III H)

📐 Dimensions

Length:

4730 mm (186.2 in)

Width:

1751 mm (68.9 in)

Height:

1410 mm (55.5 in)

Wheelbase:

2760 mm (108.7 in)

Front Track:

1462 mm (57.6 in)

Rear Track:

1486 mm (58.5 in)

Curb Weight Manual:

~1500 kg (3307 lbs)

Curb Weight Automatic:

~1530 kg (3373 lbs)

Gross Vehicle Weight:

~2000 kg (4409 lbs) (Estimated)

Trunk Capacity:

450 liters (15.9 cu ft) (Approximate)

🛡️ Safety Features

Crash Test Ratings:

NHTSA/IIHS ratings not available for this specific model year and market. Refer to general E34 chassis safety characteristics.

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Optional ASC (Automatic Stability Control) or ASC+T (Traction Control) on some models, but less common on the 520i in 1990.

Airbags:

Driver's side airbag optional; passenger airbag not typically available in 1990.

Seatbelts:

3-point inertia-reel seatbelts front and rear.

Chassis Safety:

Reinforced passenger cell, crumple zones front and rear.

💡 Technology Features

Audio System:

Factory cassette player with AM/FM radio, often with premium speaker options (e.g., HiFi system).

Display:

Basic digital or analog displays for climate control, radio presets, and odometer. No central LCD screen.

ABS:

Standard ABS provides enhanced braking control.

Cruise Control:

Standard or optional electronic cruise control.

Phone Integration:

No integrated Bluetooth or smartphone connectivity. Optional provision for early car phones.

🔧 Maintenance

Oil Change:

Every 10,000 - 15,000 km (6,000 - 9,000 miles) or 12 months, whichever comes first, depending on driving conditions.

Air Filter Replacement:

Every 30,000 - 40,000 km (18,000 - 25,000 miles)

Spark Plug Replacement:

Every 40,000 - 60,000 km (25,000 - 37,000 miles) for standard plugs, longer for platinum.

Coolant Flush:

Every 2-3 years or 40,000 - 60,000 km (25,000 - 37,000 miles)

Brake Fluid Flush:

Every 2 years

Engine Oil:

API SG or higher, ACEA A2-96 or equivalent. Viscosity: 5W-30, 5W-40, 10W-30, 10W-40, or 10W-50 depending on ambient temperature. Refer to owner's manual for precise recommendations.

Coolant:

BMW-approved Antifreeze/Coolant (Glysantin G05 or equivalent), mixed 50/50 with distilled water. Protects to -37°C (-34°F).

Power Steering Fluid:

BMW CHF 11S (Central Hydraulic Fluid) or equivalent.

Brake Fluid:

DOT 4

Cooling System:

Plastic coolant expansion tank can become brittle and crack over time; radiator leaks; water pump failure. Regular inspection and replacement of plastic components are recommended.

Oil Leaks:

Valve cover gasket, oil pan gasket, and front/rear main seals are common sources of oil leaks due to age and material degradation.

Suspension Wear:

Control arm bushings, ball joints, and tie rod ends are prone to wear, leading to vague steering and potential alignment issues.

HVAC System:

Blower motor resistors fail, leading to intermittent or non-functional fan speeds. Heater control valve leaks can occur.

Electrical Gremlins:

Corroded grounds, failing relays, and degraded wiring insulation can cause various intermittent electrical issues.

📚 Vehicle History

Bmw Legacy:

BMW, known for its 'Ultimate Driving Machine' philosophy, has a long history of producing high-performance and luxury vehicles with a focus on driver engagement.

E34 Introduction:

The E34 generation of the 5 Series was introduced in 1987, succeeding the E28. It was a significant redesign, featuring more aerodynamic styling and advanced technology.

E34 Lifespan:

The E34 generation was produced from 1987 to 1996 (with some variations depending on market).

520I Placement:

The 520i served as the entry-level model in many markets, offering a balance of BMW quality and performance at a more accessible price point compared to larger-engine variants.

Manufacturing Locations:

Primarily manufactured in Germany, with some assembly possibly occurring in other BMW global facilities.

🏆 Awards & Recognition

E34 Reputation:

The E34 generation was generally well-regarded for its driving dynamics, build quality, and comfort, often lauded by automotive journalists of the era.

Value Proposition:

As a premium sedan, the 520i offered a blend of performance and luxury that was competitive within its class.

Iso Certification:

BMW manufacturing facilities adhere to ISO quality standards.