🏷️ Basic Information

Make:

BMW

Model:

3-Series

Model Code:

E30

Specific Model:

320i

Model Years:

1987-1991

Chassis Code:

E30

👋 Introduction

Positioning:

The BMW E30 3-Series is a highly regarded compact executive car, known for its sporty handling, build quality, and timeless design. The 320i was a popular model in many markets, offering a balance of performance and economy. This manual serves enthusiasts and professional mechanics seeking to maintain or restore these iconic vehicles.

Competitors:

Competed with vehicles such as the Mercedes-Benz W201 (190E), Audi 80/90, Alfa Romeo 75, and Ford Sierra.

Highlights:

Rear-wheel drive platform, engaging driving dynamics, robust inline-six engine, durable construction, classic BMW design cues.

Value:

Provides comprehensive, accurate information essential for maintaining the reliability and performance of the BMW E30 320i, empowering owners to perform complex repairs and diagnostics themselves, saving on dealership service costs.

📋 Manual Details

Primary Coverage:

Service, Maintenance, Repair, Troubleshooting

Estimated Pages:

1500+

Type:

Full Service and Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine:

M20B20 Engine (2.0L Inline-6), Fuel Injection System (Bosch Motronic), Ignition System, Cooling System, Exhaust System

Transmission:

Getrag 260 5-Speed Manual Transmission, ZF 4HP22 4-Speed Automatic Transmission, Clutch System, Driveshaft, Differential

Brakes:

Front Ventilated Discs, Rear Solid Discs, ABS System (where equipped), Brake Fluid Specifications, Bleeding Procedures

Suspension Steering:

Front MacPherson Struts, Rear Semi-Trailing Arms, Shock Absorbers, Springs, Bushings, Power Steering System, Steering Rack

Electrical:

12V Electrical System, Battery, Alternator, Starter Motor, Lighting Systems (Headlights, Taillights, Interior), Fuses, Relays, Wiring Diagrams, Diagnostics

Body Chassis:

Body Panel Removal/Installation, Doors, Hood, Trunk, Bumpers, Interior Trim, Chassis Lubrication Points

Climate Control:

HVAC System, Air Conditioning, Heater Core, Blower Motor, Control Modules

Fuel System:

Fuel Pump, Fuel Filter, Fuel Lines, Injectors, Fuel Tank

Exhaust:

Exhaust Manifold, Catalytic Converter, Muffler, Exhaust Pipes

Maintenance:

Oil Changes, Filter Replacements, Spark Plug Service, Coolant Flush, Belt Replacement, Brake Pad Replacement, Tune-ups

Repair:

Engine Overhaul, Transmission Rebuild, Suspension Component Replacement, Brake System Repair, Electrical Component Diagnosis and Replacement, Body Panel Repair

Troubleshooting:

Diagnostic Charts for Common Issues (e.g., hard starting, poor running, electrical faults), Fault Code Interpretation (where applicable via Motronic)

Diagnostics:

Engine Management System Diagnostics, Electrical System Troubleshooting using Wiring Diagrams, Component Testing Procedures

Depth:

Comprehensive: Covers everything from routine maintenance to complete engine and transmission overhauls. Includes detailed diagnostic procedures and specifications for professional-level repairs.

📊 Manual Specifications

File Format:

PDF

Quality:

High-resolution scans, clear text, legible diagrams and images.

Binding:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Code:

M20B20

Configuration:

2.0L (1990cc) Naturally Aspirated Inline-6 Cylinder

Bore X Stroke:

80.0 mm x 66.0 mm

Compression Ratio:

8.8:1 (typical)

Valvetrain:

SOHC, 12 Valves (2 per cylinder)

Horsepower:

129 PS (127 hp; 95 kW) @ 6000 rpm (typical for European models)

Torque:

174 Nm (128 lb-ft) @ 4300 rpm (typical for European models)

Fuel Delivery:

Bosch LE-Jetronic or L-Jetronic Fuel Injection (depending on market/year, later models often Motronic)

Fuel Type:

Unleaded Gasoline (Octane rating varies by market, typically 95 RON recommended)

Ignition Type:

Electronic Ignition (BMW/Bosch)

Cooling Type:

Water-Cooled, Thermostatically Controlled

🔧 Transmission

Transmission Type:

Getrag 260 5-Speed Manual

Transmission Type:

ZF 4HP22 4-Speed Automatic

Clutch Type:

Hydraulically Actuated Single Dry Plate (Manual)

Transmission Fluid Manual:

API GL-4 or GL-5 Gear Oil, SAE 75W-90 or 80W-90 (check specific manual for exact spec)

Transmission Fluid Automatic:

Dexron III / Mercon (or equivalent specified ATF)

📐 Dimensions

Length:

Approx. 4330 mm (170.5 in) for Sedan/Coupe

Width:

Approx. 1675 mm (65.9 in)

Height:

Approx. 1380 mm (54.3 in) for Sedan/Coupe

Wheelbase:

Approx. 2570 mm (101.2 in)

Curb Weight:

Approx. 1250-1350 kg (2755-2976 lbs) depending on body style and options

Gross Vehicle Weight Rating:

Varies by model, refer to vehicle plate

Wheel Bolt Pattern:

5x120

Wheel Size:

Typically 14-inch or 15-inch alloy wheels

Tire Size:

Commonly 195/65R14 or 195/60R15

🛡️ Safety Features

NHTSA Ratings:

Data not readily available for this era and region, but E30 platform generally considered robust.

Euro Ncap Ratings:

Not applicable for this generation and period.

ABS:

Optional on some models, standard on later variants.

Traction Control:

Not typically available on the 320i E30 model.

Seatbelts:

3-point front seatbelts, 2-point rear seatbelts (later models may have 3-point rear)

Airbags:

Driver's side airbag optional from 1988/1989 onwards, not standard.

Body Structure:

Reinforced passenger cell with crumple zones front and rear.

💡 Technology Features

Audio System:

Factory fitted AM/FM radio with cassette player. Aftermarket head units and speaker upgrades are common.

Gauges Displays:

Analog gauges for speedometer, tachometer, fuel level, engine temperature. Warning lights for oil pressure, battery, brakes, check engine (sometimes).

Cruise Control:

Optional on some models.

Parking Assistance:

Not available on this model.

Bluetooth Usb:

Not available on this model. Requires aftermarket installation.

🔧 Maintenance

Oil Change Interval:

Typically every 7,500-10,000 miles (12,000-15,000 km) or annually. Consult manual for specific recommendation based on driving conditions.

Spark Plug Replacement:

Every 30,000-50,000 miles (48,000-80,000 km) depending on plug type (e.g., copper vs. platinum). Refer to manual for specific plug part numbers and gaps.

Coolant Flush:

Every 2-3 years or 30,000-50,000 miles (48,000-80,000 km).

Timing Belt:

M20 engines use a timing belt. Replacement interval is critical, typically 40,000-60,000 miles (64,000-96,000 km) or 4-5 years. Failure can cause severe engine damage.

Engine Oil:

API SG/SH or ACEA A2/A3, SAE 5W-30, 5W-40, 10W-40, or 10W-50 depending on ambient temperature. Refer to manual for precise grade.

Coolant:

BMW Blue Antifreeze/Coolant (G48) or equivalent ethylene glycol-based coolant with corrosion inhibitors. 50/50 mix with distilled water.

Brake Fluid:

DOT 3 or DOT 4, ideally DOT 4 LV (Low Viscosity) for ABS systems. Flush every 2 years.

Power Steering Fluid:

Dexron III / Mercon ATF or specific BMW power steering fluid (e.g., CHF 11S on some later models, but likely ATF for E30).

Common Issues:

Cracked dashboard, coolant expansion tank leaks, fuel distributor diaphragm issues (Bosch), fuel pump failure, trailing arm bushings wear, oil leaks (valve cover gasket, oil pan gasket), vacuum hose deterioration, sunroof drain blockage, heater control valve failure, H&R sway bar end link issues.

Preventive Maintenance Focus:

Regular inspection and replacement of rubber components (hoses, bushings), timely timing belt replacement, and thorough cooling system maintenance are critical for E30 longevity.

📚 Vehicle History

Bmw Heritage:

BMW has a long-standing reputation for producing performance-oriented vehicles with exceptional driving dynamics and build quality, rooted in its aviation and automotive engineering history.

E30 Introduction:

The E30 generation of the 3-Series was introduced in 1982 as a successor to the popular E21. It was a significant evolution, offering improved aerodynamics, refined styling, and a wider range of engines.

E30 Updates:

The E30 received a significant facelift in 1987 (often referred to as 'late model' E30), introducing revised bumpers, updated interior trim, and various mechanical refinements. The 1987-1991 range represents these updated models.

Production Period:

1982-1994 (globally, specific E30 320i 1987-1991)

Manufacturing Locations:

Germany (Munich, Dingolfing), Austria, South Africa, Mexico, Thailand, etc.

E30 Legacy:

The E30 is considered a benchmark for compact sports sedans and coupes and is highly sought after by collectors and driving enthusiasts.

🏆 Awards & Recognition

Automotive Press:

The E30 generation received numerous accolades from automotive publications during its production run for its handling, performance, and overall driving experience. It is often cited as one of BMW's best driver's cars.

Collector Status:

Highly regarded by enthusiasts, with certain E30 variants (like the M3 and some later models) becoming increasingly valuable collector items.