Bmw E30 M3 Wiring Diagram 1987-1991

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🏷️ Basic Information Identification Make: BMW Model: M3 Chassis Code: E30 Model Years Covered: 1987-1991 Codes Engine Code Primary: S14 👋 Introduction Market Position Vehicle Segment: Compact Executive Sports Sedan/Coupe...

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类型: Car

斯库: 283393

标签: 1987 1988 1989 1990 1991 3 Series BMW Car Cars E30 M3

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Description

🏷️ Basic Information

Identification

Make:

Model:

Chassis Code:

Model Years Covered:

1987-1991

Codes

Engine Code Primary:

👋 Introduction

Market Position

Vehicle Segment:

Compact Executive Sports Sedan/Coupe

Performance Focus:

Homologation special for racing, road-legal performance variant

Competitive Analysis

Key Competitors:

Porsche 944, Mercedes-Benz 190E 2.3-16/2.5-16, Ford Sierra RS Cosworth, Alfa Romeo 75

Key Features

Handling Dynamics:

Renowned for precise steering, balanced chassis, and exceptional driver feedback

Engine Development:

Purpose-built, high-revving 4-cylinder engine derived from motorsport

Aerodynamics:

Distinctive box-flared fenders, revised front/rear spoilers for improved downforce

📋 Manual Details

Coverage Areas

Diagnostic Systems:

Engine Management, ABS, Check Control, Body Electronics, HVAC, Instrument Cluster

Mechanical Systems:

Engine, Fuel System, Ignition System, Cooling System, Lubrication System, Drivetrain, Suspension, Steering, Brakes

Electrical Systems:

Starting System, Charging System, Lighting, Wipers, Washers, Power Windows, Central Locking, Audio System, Cruise Control

Page Count

Estimated Pages:

Manual Type

Type:

Wiring Diagram Manual

Language

Language:

English

Format

Format:

Downloadable

Availability:

Compatibility

Operating Systems:

All Versions of Windows & Mac

Requirements

Software:

Adobe PDF Reader

📖 Manual Coverage

Systems Covered

Engine Electrical:

Full engine wiring harness, ECU connections, sensor wiring (Crankshaft Position Sensor, Camshaft Position Sensor, Knock Sensor, Temperature Sensors, Lambda Sensor)

Ignition System:

Ignition coil, distributor (if applicable to specific E30 M3 variant), ECU control signals

Fuel Injection:

Fuel pump relay, injectors, Air Flow Meter (AFM) or Manifold Absolute Pressure (MAP) sensor, fuel pressure regulator wiring

Starting Charging:

Starter motor, alternator, battery connections, ignition switch wiring

Lighting Exterior:

Headlights (low/high beam), taillights, brake lights, turn signals, fog lights, license plate lights

Lighting Interior:

Dome light, courtesy lights, dashboard illumination, glove box light

Instrumentation:

Speedometer, tachometer, fuel gauge, temperature gauge, oil pressure warning light, Check Control indicators

Climate Control:

HVAC blower motor, temperature controls, recirculation flap actuators, AC compressor clutch wiring

Windows Locks:

Power window motors and switches, central locking system wiring

Wipers Washers:

Wiper motor, washer pump, intermittent wiper module (if equipped), switch wiring

Audio System:

Radio wiring, speaker connections, antenna wiring

Cruise Control:

System components and control module wiring (if equipped)

ABS control module, wheel speed sensors, hydraulic unit wiring

Procedures Included

Troubleshooting Guides:

Wiring fault diagnosis, component testing, common electrical issue resolution

Component Identification:

Clear identification of electrical components, relays, fuses, and connectors

Wiring Harness Routing:

Visual representation of wiring harness paths throughout the vehicle

Connector Pinouts:

Detailed pinout diagrams for major ECUs and connectors

Fuse Relay Locations:

Identification and function of all fuses and relays

Technical Depth

Depth Level:

Comprehensive Electrical System Diagnosis and Repair

📊 Manual Specifications

File Format

Format:

Print Quality

Printability:

All pages are printable

Binding Type

Binding:

N/A (Digital Download)

Paper Type

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Naturally Aspirated Inline-4 (DOHC, 16-valve)

Displacement:

2.3 Liters (2302 cc)

Bore X Stroke:

91.0 mm x 89.6 mm

Compression Ratio:

10.5:1

Performance

Horsepower Us Spec:

192 hp @ 6900 rpm

Torque Us Spec:

170 lb-ft @ 4750 rpm

Horsepower Euro Spec:

200 hp @ 6900 rpm (Catalytic Converter equipped models, some variations)

Torque Euro Spec:

177 lb-ft @ 4750 rpm (Catalytic Converter equipped models, some variations)

Redline:

7250 rpm

Fuel System

Fuel Delivery:

Bosch L-Jetronic Fuel Injection (later models may feature Motronic variants)

Fuel Type Required:

Premium Unleaded Gasoline (91+ Octane)

Lubrication System

Oil Capacity:

5.5 Liters (5.8 US Quarts)

Oil Filter Part Number Example:

Mann-Filter W90, Mahle OC 27

Cooling System

Coolant Capacity:

8.0 Liters (8.5 US Quarts)

🔧 Transmission

Standard

Transmission Type:

Getrag 265 5-speed Manual

Gear Ratios Close Ratio:

1st: 3.72, 2nd: 2.40, 3rd: 1.77, 4th: 1.30, 5th: 1.00

Gear Ratios Dogleg Shift Pattern:

1st: 3.72, 2nd: 2.40, 3rd: 1.77, 4th: 1.30, 5th: 1.00 (Note: 1st gear is to the left and down, common on performance variants)

Optional

Transmission Type:

None (M3 exclusively manual)

Features

Clutch Type:

Hydraulically actuated single dry plate

Differential:

Limited-Slip Differential (LSD) standard

Transmission Fluid Type:

BMW Synthetic Gear Oil (e.g., SAE 75W-90 GL-5)

Transmission Fluid Capacity:

1.2 Liters (1.3 US Quarts)

📐 Dimensions

Exterior

Length:

4330 mm (170.5 in)

Width:

1700 mm (66.9 in)

Height:

1370 mm (53.9 in)

Wheelbase:

2565 mm (101.0 in)

Front Track:

1430 mm (56.3 in)

Rear Track:

1430 mm (56.3 in)

Weights

Curb Weight:

Approx. 1200-1250 kg (2645-2755 lbs)

Gross Vehicle Weight Rating Gvwr:

Approx. 1600 kg (3527 lbs)

Towing Capacity:

Not Recommended/Specified

Wheels Tires

Standard Wheel Size:

15 x 7.0J (early models), 16 x 7.5J (later models)

Standard Tire Size:

205/55 VR 15 (early models), 225/45 VR 16 (later models)

Bolt Pattern:

5x120 mm

Center Bore:

72.5 mm

🛡️ Safety Features

Ratings

Crash Test Data:

Limited specific modern crash test data available; based on E30 platform standards of the era.

Active Features

Standard on most E30 M3 models (Bosch ABS II)

Brakes Front:

Ventilated Disc, 280 mm diameter

Brakes Rear:

Solid Disc, 272 mm diameter

Passive Features

Seatbelts:

3-point inertia reel seatbelts front and rear

Headrests:

Front adjustable headrests

Chassis Structure:

Reinforced body structure with integrated roll cage elements (for racing homologation)

💡 Technology Features

Infotainment

Audio System Standard:

Basic AM/FM radio with cassette player, 4 speakers.

Infotainment Options:

Optional upgraded sound systems, premium cassette units.

Driver Assistance

Anti-lock Braking System (ABS)

Cruise Control:

Optional cruise control system

Connectivity

Bluetooth:

Not available from factory

Not available from factory

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 7,500 - 10,000 miles (12,000 - 16,000 km) or annually, whichever comes first.

Spark Plug Replacement:

Every 30,000 - 40,000 miles (48,000 - 64,000 km)

Timing Belt Replacement:

Not applicable (chain-driven camshafts)

Coolant Flush:

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

Brake Fluid Flush:

Every 2 years

Transmission Fluid Change:

Every 30,000 - 50,000 miles (48,000 - 80,000 km)

Fluid Specifications

Engine Oil Type:

SAE 15W-50 or 20W-50 Synthetic (depending on climate and driving conditions, consult manual for specific recommendations)

Coolant Type:

BMW Blue Antifreeze/Coolant (G48 ethylene glycol-based) or equivalent

Brake Fluid Type:

DOT 4

Known Issues

Electrical Gremlins:

Corroded grounds, failing relays (especially fuel pump and ABS), frayed wiring in stress points.

Fuel System:

Clogged injectors, failing fuel pump, weak fuel pressure regulator.

Engine S14:

Oil leaks from valve cover and oil pan gaskets, potential valve seat wear in high-mileage examples, timing chain tensioner wear.

Suspension Bushings:

Worn control arm bushings, trailing arm bushings, subframe bushings leading to vague handling.

Rust:

Common areas include wheel arches, rocker panels, jacking points, and around windows.

📚 Vehicle History

Brand Heritage

Bmw Motorsport:

BMW Motorsport division (later BMW M GmbH) origins, focused on racing homologation.

Model Evolution

E30 Platform:

Based on the E30 3 Series platform, heavily modified for performance.

Homologation Purpose:

Developed to compete in Group A Touring Car racing, requiring a specified number of road-going examples.

Key Variants:

Evolution I (1986-1987), Evolution II (1988), Sport Evolution (1989-1990)

Production

Production Years:

1986-1991

Production Location:

Regensburg, Germany

Total Production Units:

Approx. 18,000 units (across all variants and markets)

🏆 Awards & Recognition

Recognitions

Motorsport Success:

Numerous wins and championships in touring car series worldwide, including DTM, ETCC, and IMSA GTO.

Automotive Journals:

Consistently praised by automotive press for its driving dynamics, engine performance, and motorsport pedigree.

Collectibility:

Highly sought-after collector car, recognized as one of the greatest BMW M cars of all time.