🏷️ Basic Information

Make:

BMW

Model:

3 Series

Generation Name:

E30

Chassis Code:

E30

Engine Codes Covered:

M10, M20, M40, M42, M21

👋 Introduction

Target Audience:

Enthusiast owners, DIY mechanics, and independent repair shops specializing in classic BMWs.

Value Proposition:

Provides access to authentic, factory-level repair information, enabling accurate and efficient maintenance and repair of the E30 3 Series.

Comparison To Aftermarket:

Offers superior accuracy, detail, and completeness compared to many aftermarket manuals, reflecting BMW's specific engineering and procedures.

Authenticity:

Original Factory Service Manual (FSM) ensuring manufacturer-specific procedures and specifications.

Comprehensiveness:

Covers a wide range of models and years within the E30 generation, including various engine options.

Usability:

Designed for ease of use with clear text, detailed diagrams, and logical organization.

📋 Manual Details

Models Covered:

316, 316i, 318i, 318is, 320i, 320is, 324, 324d, 324td

Model Years Covered:

1985, 1986, 1987, 1988, 1989, 1990

Estimated Page Count:

Extensive (Likely 500+ pages, typical for original factory manuals of this era)

Type:

Factory Service Manual (FSM) / Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine Mechanical:

Complete overhaul procedures, component testing, assembly, timing belt/chain replacement, piston rings, bearings, cylinder head service.

Engine Management And Fuel:

Fuel injection systems (Bosch L-Jetronic, Motronic), carburetion (on some early models), ignition systems, diagnostics, sensor testing, ECU troubleshooting.

Transmission:

Manual and automatic transmission overhaul, clutch replacement, gearbox diagnostics, fluid specifications.

Drivetrain:

Axles, driveshafts, differential service, wheel bearings, CV joints.

Suspension:

Front and rear suspension component replacement (struts, shocks, control arms, bushings), alignment specifications, spring replacement.

Steering:

Power steering system service, steering rack overhaul, tie rod ends, steering column.

Brakes:

Disc brake service (pads, rotors, calipers), drum brake service (where applicable), hydraulic system (master cylinder, brake lines, bleeding), ABS diagnostics (if equipped).

Electrical System:

Complete wiring diagrams, starter motor, alternator, battery service, lighting systems, fuses, relays, switch testing, power windows, central locking.

Body And Chassis:

Body panel removal/installation, interior trim, glass replacement, door mechanisms, hinge adjustment, rust repair guidance.

Heating And Air Conditioning:

HVAC system diagnosis, component replacement (compressor, evaporator, heater core), refrigerant service (pre-R134a).

Exhaust System:

Exhaust component replacement, catalytic converter information (if applicable).

Maintenance:

Scheduled maintenance tasks, fluid changes (oil, coolant, brake fluid, transmission fluid), filter replacements, spark plug service.

Troubleshooting:

Diagnostic procedures for common faults, symptom-based troubleshooting guides, electrical system diagnosis.

Repair:

Step-by-step repair instructions for all major mechanical and electrical components.

Diagnostics:

OBD-I diagnostic codes and procedures, component testing with multimeter and specialized tools.

Depth:

Comprehensive (suitable for DIY mechanics and professional technicians alike, covering everything from routine maintenance to full engine and transmission rebuilds).

📊 Manual Specifications

File Type:

PDF

Searchable:

Yes (typically)

Printable:

Yes

Quality Description:

High-resolution scans of original factory documentation, ensuring clarity of text and diagrams.

Binding:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Families:

M10 (4-cylinder), M20 (6-cylinder), M40 (4-cylinder), M42 (4-cylinder DOHC), M21 (Diesel 6-cylinder).

316/316I Power:

Approx. 75-98 hp (depending on market and specific engine variant).

318I/318Is Power:

Approx. 98-115 hp (318is typically features DOHC M42).

320I/320Is Power:

Approx. 125-129 hp (320is often features the M20B20). Note: 320is was a special homologation model with M20B20 and performance enhancements.

324D Power:

Approx. 86 hp (Naturally Aspirated Diesel).

324Td Power:

Approx. 115 hp (Turbocharged Diesel).

Fuel Delivery Gasoline:

Bosch L-Jetronic or Motronic fuel injection; Carburetor on some early 316 models.

Fuel Type:

Unleaded gasoline (91+ RON recommended), Diesel fuel for diesel variants.

M10:

1.6L, 1.8L

M20:

2.0L, 2.3L (though 2.3L not specified in product title, it's common E30), 2.5L (later models, not specified but relevant).

M40:

1.6L

M42:

1.8L (DOHC)

M21:

2.4L Diesel

🔧 Transmission

Manual Gearboxes:

Getrag 240 (4-speed or 5-speed) for smaller engines, Getrag 260 (5-speed) for larger engines.

Automatic Gearboxes:

ZF 4HP22 (4-speed automatic).

Clutch Type:

Single dry plate, hydraulically actuated (for manual transmissions).

Manual Transmission Fluid Spec:

API GL-4, SAE 75W-90 or 80W-90 (consult manual for exact spec based on year/model).

Automatic Transmission Fluid Spec:

Dexron II or equivalent.

📐 Dimensions

Body Styles:

2-door sedan, 4-door sedan, convertible, station wagon (Touring - although less common for this specific manual coverage).

Wheelbase Mm:

Approximately 2570 mm (varies slightly by body style).

Curb Weight Kg:

Approximately 1100-1350 kg (depending on engine and body style).

🛡️ Safety Features

Crash Test Era:

E30 generation pre-dates standardized NCAP testing as we know it today, but was designed to robust German safety standards of the era.

ABS:

Optional on most models, standard on some later performance variants (e.g., 320is, M3).

Seatbelts:

Three-point seatbelts standard front and rear.

Body Structure:

Reinforced safety cage, crumple zones front and rear.

Headrests:

Front and rear headrests.

💡 Technology Features

Radio:

Factory-installed AM/FM radio, often with cassette player. Aftermarket upgrades are common.

Speakers:

Typically 4-6 speakers depending on trim level.

ABS:

Optional ABS system available on most models, improving braking stability.

Early Car Tech:

Limited by era. Focus on mechanical and electrical reliability rather than electronic connectivity.

🔧 Maintenance

Oil Change Interval Km Miles:

Typically every 10,000-15,000 km (6,000-9,000 miles) or annually. Consult the manual for exact mileage/time based on driving conditions.

Spark Plug Replacement Km Miles:

Variable based on plug type (e.g., copper vs. platinum), often around 40,000-60,000 km (25,000-37,000 miles) for standard plugs.

Timing Belt Replacement Km Miles:

For M40 and M42 engines: Generally around 80,000-100,000 km (50,000-60,000 miles) or 5-7 years. M10/M20 engines use timing chains, requiring less frequent specific replacement but still periodic inspection.

Engine Oil Capacity Liters:

Approximately 4.0-5.5 liters (depending on engine variant, consult manual).

Engine Oil Type:

SAE 10W-40 or 15W-40 for gasoline engines, often API SG or higher. Diesel engines may require specific diesel engine oils. Consult manual for exact BMW approved specifications (e.g., BMW Longlife-xx).

Coolant Type:

Ethylene glycol-based coolant, typically a 50/50 mix with distilled water. BMW's own coolant or equivalent meeting their specifications is recommended.

Common Failures Electrical:

Corrosion in wiring harnesses, failing dashboard illumination, fuel pump relays, fuel level senders.

Common Failures Mechanical:

Cracked plastic coolant expansion tanks, worn suspension bushings (control arms, sway bar links), seized heater control valves, exhaust manifold cracks (M20).

Common Failures Engine:

Head gasket failures (especially on higher mileage M20 engines), worn oil pump chains (M20), fuel injector issues (Bosch systems).

Common Failures Body:

Rust in common areas: wheel arches, rocker panels, sunroof drains, jacking points.

📚 Vehicle History

Bmw Philosophy:

BMW's established reputation for sporty handling, driver engagement, and robust engineering.

E30 Launch:

Launched in 1982 as a successor to the E21, the E30 marked a significant evolution in BMW's compact executive car line.

E30 Significance:

Highly influential model, often credited with cementing BMW's reputation for performance sedans. Also introduced the M3 variant and the first diesel 3 Series.

Production Period:

1982-1994 (coupes and convertibles lasted longer).

Manufacturing Locations:

Primarily Germany (Munich, Dingolfing), with some production also in South Africa and other international locations.

🏆 Awards & Recognition

General Reputation:

Widely regarded as one of the best driver's cars of its era. The E30 M3 is a motorsport icon and collectible classic.

Performance Acclaim:

Consistently praised for its balanced chassis, responsive steering, and engaging driving dynamics.