🏷️ Basic Information

Make:

BMW

Model:

3 Series

Chassis Code:

E30

Production Years:

1983-1991

Engine Codes Covered:

M10 (M10B18, M10B20), M20 (M20B23, M20B25, M20B27), M40 (M40B18), S14 (M42B18)

Transmission Codes Covered:

Getrag 240, Getrag 260, ZF 4HP22

👋 Introduction

Target Audience:

BMW E30 enthusiasts, DIY mechanics, restoration specialists, and independent repair shops seeking authoritative technical information.

Value Proposition:

Provides a singular, comprehensive resource for the entire E30 generation, consolidating information often found across multiple specialized manuals. Offers superior detail compared to generic Haynes or Chilton manuals.

Comprehensiveness:

Covers all models and engine variants produced within the 1983-1991 E30 lifespan, offering a complete repository of knowledge.

Accessibility:

Digital format allows for instant access, easy searching, and convenient viewing on computers, tablets, or smartphones.

Accuracy:

Based on official BMW factory service data, ensuring precision in repair procedures, specifications, and diagrams.

📋 Manual Details

Coverage Scope:

Comprehensive repair, maintenance, diagnostics, rebuilding, refurbishment, and restoration

Estimated Page Count:

Extensive (digital format, no fixed page count but covers all content)

Manual Type:

Digital Workshop Repair Manual

Language:

English

Format:

Digital (likely PDF or similar searchable document)

📖 Manual Coverage

Powertrain Systems:

Engine mechanical (M10, M20, M40, S14 variants), fuel injection (Bosch L-Jetronic, Motronic), ignition systems, cooling system, exhaust system, lubrication system

Drivetrain Systems:

Manual transmissions (Getrag 240, 260), automatic transmissions (ZF 4HP22), clutch, driveshafts, differential, rear axle assembly

Suspension And Steering:

Front and rear suspension components (struts, control arms, bushings, springs, shock absorbers), power steering system, steering rack, steering column

Braking System:

Front and rear brakes (disc and drum configurations), ABS (Anti-lock Braking System) troubleshooting, brake hydraulics, parking brake

Electrical System:

Wiring diagrams, starter motor, alternator, battery, lighting systems (headlights, taillights, interior), fuse boxes, relays, instrument cluster, onboard computer (if applicable)

Body And Chassis:

Body panel removal and installation, doors, windows, sunroof, interior trim, bumpers, corrosion protection, chassis specifications

Climate Control And HVAC:

Heating, ventilation, and air conditioning (HVAC) system components, refrigerant handling, blower motor, climate control panel

Fuel System:

Fuel tank, fuel pump, fuel lines, fuel injectors, fuel pressure regulator

Routine Maintenance:

Oil changes, filter replacements (oil, fuel, air), spark plug replacement, coolant flush, brake fluid flush, transmission fluid change, differential fluid change, belt inspection and replacement

Diagnostic Procedures:

Troubleshooting guides for common issues, diagnostic trouble codes (DTCs) interpretation (where applicable for specific ECUs), electrical system testing, engine performance diagnostics

Engine Repair And Rebuild:

Cylinder head removal and reassembly, piston and connecting rod installation, crankshaft installation, camshaft timing, valve adjustment, engine seal replacement, complete engine overhauls

Transmission And Drivetrain Repair:

Transmission removal and installation, clutch replacement, driveshaft U-joint replacement, differential overhaul, axle seal replacement

Suspension And Steering Repair:

Component replacement (ball joints, tie rod ends, control arm bushings), wheel bearing replacement, steering rack repair or replacement, strut and shock absorber replacement

Brake System Repair:

Brake pad and rotor replacement, caliper overhaul, master cylinder replacement, brake line replacement, ABS component testing and replacement

Electrical Component Replacement:

Alternator, starter, battery, ignition coil, fuel injectors, sensors (e.g., MAF, O2), ECU troubleshooting and replacement

Bodywork And Cosmetic Repairs:

Panel alignment, trim piece replacement, window regulator repair, sunroof mechanisms

Depth Of Information:

Deeply technical, covering everything from basic fluid changes to complete engine and transmission rebuilds, including detailed diagnostic flowcharts and torque specifications.

Diagnostic Capabilities:

Detailed diagnostic procedures and troubleshooting charts for identifying and resolving mechanical, electrical, and fuel system issues.

Rebuild Instructions:

Complete instructions for rebuilding major mechanical components like engines and transmissions, including clearances, tolerances, and assembly sequences.

📊 Manual Specifications

Digital File Type:

PDF (Portable Document Format) or similar, allowing for searchability and easy navigation.

Digital Rendering:

High-resolution digital scans or original digital files ensuring clear diagrams, text, and illustrations. Printable pages.

Binding Type:

Not Applicable (Digital Format)

Paper Type:

Not Applicable (Digital Format)

⚙️ Engine Specifications

Engine Variants M10:

1.8L (M10B18, 105 hp), 2.0L (M10B20, 125 hp) - 4-cylinder SOHC

Engine Variants M20:

2.3L (M20B23, 141 hp), 2.5L (M20B25, 168 hp), 2.7L (M20B27 'eta', 121 hp) - 6-cylinder SOHC

Engine Variants M40:

1.8L (M40B18, 115 hp) - 4-cylinder SOHC (later models)

Engine Variants S14:

2.3L (S14B23, 192-215 hp), 2.5L (S14B25, 238 hp) - 4-cylinder DOHC (M3 models)

Horsepower Range:

105 hp to 238 hp depending on engine and model

Torque Range:

103 lb-ft to 243 lb-ft depending on engine and model

Fuel Delivery:

Mechanical Fuel Injection (MFI) - Bosch K-Jetronic and L-Jetronic, Electronic Fuel Injection (EFI) - Bosch Motronic for later models.

Ignition System:

Distributor-based ignition, electronic ignition control systems (e.g., Motronic)

Engine Oil Type:

Typically 10W-40 or 20W-50 synthetic or semi-synthetic, refer to manual for specific engine variant recommendations (e.g., Castrol GTX, Mobil 1).

Coolant Type:

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

🔧 Transmission

Standard Transmission:

4-speed and 5-speed manual transmissions (Getrag 240, Getrag 260)

Optional Transmission:

3-speed and 4-speed automatic transmissions (ZF 3HP22, ZF 4HP22)

Clutch Type:

Single dry plate clutch (manual transmission)

Transmission Fluid Type:

Manual: SAE 75W-90 synthetic gear oil (e.g., Red Line, Castrol). Automatic: ATF Dexron II or III (e.g., Pentosin ATF-1100)

Differential Oil Type:

SAE 75W-90 or 80W-90 gear oil (check for limited-slip differential requirements)

📐 Dimensions

Wheelbase:

Approx. 101.2 inches (2570 mm)

Length:

Approx. 170.5 - 174.9 inches (4330 - 4443 mm) depending on body style

Width:

Approx. 65.7 - 66.7 inches (1670 - 1694 mm)

Height:

Approx. 54.1 - 55.1 inches (1375 - 1400 mm)

Curb Weight:

Approx. 2600 - 3100 lbs (1180 - 1406 kg) depending on configuration

Wheel Bolt Pattern:

4x100mm (common)

Wheel Offset:

ET13 to ET25 (varies by model and wheel size)

Tire Sizes:

Common sizes include 195/65R14, 205/55R14, 205/50VR15, 225/45ZR15 (M3)

🛡️ Safety Features

Crash Test History:

NHTSA and IIHS ratings from the era; generally considered safe for its time. Manual will cover occupant restraint systems.

ABS:

Optional on many models, standard on some later E30s and M3s. Manual covers ABS system diagnostics and repair.

Traction Control:

Rarely available on E30 models, not a common feature addressed.

Airbags:

Driver airbag became optional and then standard on later models. Manual covers airbag system components and safety precautions.

Seat Belts:

3-point inertia-reel seatbelts with pretensioners on front seats (later models). Manual covers seatbelt system inspection and repair.

Structural Integrity:

Designed with a robust unibody structure, featuring crumple zones. Manual provides chassis specifications for repair.

💡 Technology Features

Audio Systems:

Factory fitted cassette/radio units (e.g., Grundig, Blaupunkt). Manual covers basic electrical troubleshooting for these systems.

Navigation:

Not available in this era.

Cruise Control:

Optional on many models. Manual covers installation and troubleshooting of cruise control systems.

Onboard Computer:

Limited to basic check control systems (e.g., fluid levels, bulb failure) on some higher-trim models. Manual covers functionality and troubleshooting.

Remote Keyless Entry:

Not standard; some aftermarket systems or very late models might have had it. Manual unlikely to cover aftermarket.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000-7,500 miles (8,000-12,000 km) or annually, depending on driving conditions and oil used. Manual provides detailed recommendations.

Spark Plug Replacement:

Around 30,000 miles (48,000 km), or as specified by plug type. Manual lists correct spark plug part numbers and gap settings.

Timing Belt Replacement:

Not applicable to most E30 engines (M10, M20, M40 use timing chains; S14 uses a chain). Manual details inspection and tensioner replacement for chains.

Coolant Flush:

Every 2-3 years or 30,000-50,000 miles (48,000-80,000 km). Manual specifies correct coolant type and procedure.

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid (e.g., Pentosin DOT 4 LV). Manual provides bleeding procedures and capacity.

Power Steering Fluid Type:

Pentosin CHF 11S or equivalent hydraulic fluid (check specific model/year).

Common E30 Failures:

Corrosion (wheel arches, jacking points, battery tray), fuel distributor leaks (MFI), fuel pump failure, radiator leaks, heater core leaks, cracked dashboard, differential mount cracking, subframe bushings, starter solenoid issues, idle control valve issues.

Maintenance Tips:

Regular underbody inspection for rust, consistent fluid changes, careful attention to cooling system integrity, and periodic checking of rubber bushings are key to longevity.

📚 Vehicle History

Bmw Legacy:

BMW's reputation for building driver-focused, performance-oriented luxury vehicles with excellent handling characteristics. The E30 carried this legacy forward from the E21.

E30 Development:

Evolved from the E21 3 Series, featuring a more modern chassis, improved aerodynamics, and a wider range of engine options. Introduced iconic body styles like the coupe, sedan, convertible, and touring.

M3 Introduction:

The E30 M3, launched in 1986, is a homologation special for racing, featuring a unique S14 engine, wider bodywork, and a more sophisticated suspension system. It is highly sought after by collectors.

Global Production:

Approximately 2.3 million units produced worldwide across all body styles. Produced in Germany (Munich, Regensburg) and South Africa.

Key Markets:

North America, Europe, Japan. Very popular in its home market of Germany.

🏆 Awards & Recognition

E30 Reputation:

Widely regarded as a classic and one of BMW's most iconic and best-driving models. Earned numerous accolades for handling, build quality, and performance in its era.

E30 M3 Awards:

The E30 M3 is a motorsport legend, dominating touring car championships worldwide. Highly praised for its driving dynamics and track capabilities.

Automotive Journals:

Consistently reviewed favorably by automotive journalists for its balance, steering feel, and driver engagement.

Factory Manual Standard:

Represents BMW's official factory service documentation standards, providing authorized repair procedures.