BMW 325i 1987-1991 Service Repair Manual

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🏷️ Basic Information Identification Make: BMW Model: 325i Model Generation Code: E30 Model Generation Name: Second Generation E30 Codes Chassis Code: E30 Engine Code Identifier: M20B25 👋 Introduction Market Position...

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类型: Car

斯库: 357978

标签: 1987 1988 1989 1990 1991 325i BMW Car Cars Misc

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Description

🏷️ Basic Information

Identification

Make:

Model:

Model Generation Code:

Model Generation Name:

Second Generation E30

Codes

Chassis Code:

Engine Code Identifier:

M20B25

👋 Introduction

Market Position

Segment:

Compact Executive Sports Sedan/Coupe

Reputation:

Renowned for its driving dynamics, build quality, and sporty character.

Competitive Analysis

Key Competitors:

Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, Ford Sierra XR4i, Opel Monza/Senator

Key Features

Driving Dynamics:

Excellent balance, rear-wheel drive, responsive steering, well-engineered suspension.

Engine Smoothness:

The M20 straight-six engine is known for its smooth operation and linear power delivery.

Build Quality:

Exceptional German engineering and high-quality materials for its era.

Manual Purpose

Utility:

Essential tool for owners and independent mechanics to maintain and repair the E30 325i effectively.

📋 Manual Details

Coverage Areas

Covered Years:

1987, 1988, 1989, 1990, 1991

Covered Models:

BMW 325i

Specific Trim Levels:

All 325i trims (e.g., base, sport, convertible, sedan, coupe)

Page Count

Estimated Page Count:

Approximately 2000+ pages (typical for comprehensive factory-style manuals)

Manual Type

Type:

Service and Repair Manual

Source Type:

Likely based on or derived from factory service information

Language

Language:

English

Format

Format:

PDF Download

📖 Manual Coverage

Systems Covered

Powertrain:

Engine mechanical, fuel system, ignition system, cooling system, exhaust system, engine management (DME), transmission (manual & automatic)

Chassis:

Suspension (front & rear), steering system, braking system (including ABS where applicable), wheels and tires

Electrical:

Complete electrical system, wiring diagrams, battery, alternator, starter, lighting, instrumentation, fuses, relays, engine control unit (ECU) diagnostics

Body:

Body construction, exterior panels, doors, windows, sunroof, interior trim, HVAC system

Procedures Included

Maintenance Procedures:

Oil changes, filter replacements, spark plug replacement, fluid checks and top-offs, belt inspection/replacement, brake pad/rotor service, tune-ups

Diagnostic Procedures:

Troubleshooting guides, symptom-based diagnostics, electrical system testing, engine performance analysis

Repair Procedures:

Engine rebuilds, transmission overhauls, suspension component replacement, brake caliper service, electrical component repair, body panel repair

Adjustment Procedures:

Valve adjustments, idle speed adjustments, ignition timing adjustments (where applicable), clutch adjustment

Special Tools Procedures:

Identification and use of BMW-specific tools for various repair procedures

Technical Depth

Depth Level:

Comprehensive: Covers everything from routine maintenance to complete engine and transmission rebuilds.

Diagnostic Focus:

Detailed diagnostic flowcharts and explanations for common issues.

Torque Specifications:

Includes precise torque values for critical fasteners across all systems.

Wiring Diagrams:

Complete and detailed electrical wiring schematics for all vehicle systems.

📊 Manual Specifications

File Format

File Type:

Searchability:

Text-searchable (if properly OCR'd)

Print Quality

Quality:

High resolution, suitable for printing individual pages or the entire manual.

Binding Type

Binding:

Not applicable (digital format)

Paper Type

Paper:

Not applicable (digital format)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Naturally Aspirated Inline 6-Cylinder

Engine Code:

M20B25

Displacement:

2494 cc (2.5 Liters)

Bore X Stroke:

84 mm x 75 mm

Compression Ratio:

8.8:1

Valvetrain:

SOHC (Single Overhead Camshaft), 2 valves per cylinder

Performance

Horsepower:

168 hp @ 5800 rpm (approx.)

Torque:

225 Nm (166 lb-ft) @ 4300 rpm (approx.)

Fuel System

Fuel Delivery:

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

Fuel Type:

Unleaded Premium Gasoline (91 Octane or higher recommended)

Cooling System

Coolant Type:

BMW Blue Antifreeze/Coolant (or equivalent ethylene glycol-based with corrosion inhibitors)

Lubrication System

Oil Type:

SAE 15W-40 or 20W-50 (check manual for specific conditions/approvals)

Oil Capacity:

Approx. 4.25 liters (4.5 US quarts) with filter

🔧 Transmission

Standard

Transmission Type:

5-speed Manual Transmission (Getrag 260/5)

Optional

Transmission Type:

4-speed Automatic Transmission (ZF 4HP22)

Features

Clutch Type:

Hydraulically actuated single-plate dry clutch

Manual Gear Ratios:

Refer to manual for specific ratios (e.g., 3.72:1 first gear)

Automatic Gear Ratios:

Refer to manual for specific ratios (e.g., 2.48:1 first gear)

Transmission Fluid Manual:

GL-4 Gear Oil (e.g., 75W-90 synthetic or mineral)

Transmission Fluid Automatic:

Dexron III/Mercon ATF (or equivalent)

📐 Dimensions

Exterior

Length:

Approx. 4340 mm (170.9 in)

Width:

Approx. 1670 mm (65.7 in)

Height:

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

Wheelbase:

Approx. 2570 mm (101.2 in)

Track Width Front:

Approx. 1406 mm (55.3 in)

Track Width Rear:

Approx. 1436 mm (56.5 in)

Weights

Curb Weight:

Approx. 1320 kg (2910 lbs) for manual sedan

Gross Vehicle Weight Rating:

Refer to vehicle data plate

Towing Capacity:

Not typically specified for this model

Cargo

Trunk Volume:

Approx. 450 liters (15.9 cu ft) for sedan

🛡️ Safety Features

Ratings

Crash Test Results:

NHTSA and IIHS ratings from the era are available but may not be directly comparable to modern standards. The E30 chassis was considered robust for its time.

Active Features

Available on some models/trims (Anti-lock Braking System)

Traction Control:

Not commonly available on this generation

Passive Features

Airbags:

Driver airbag standard from late 1989/1990 models onwards. Passenger airbag not typical.

Seatbelts:

3-point front and rear seatbelts

Rollover Protection:

Reinforced A-pillars and B-pillars (especially on convertible models)

💡 Technology Features

Infotainment

Audio System:

Factory cassette radio with optional CD changer integration (later models).

Instrumentation:

Analog gauges for speedometer, tachometer, fuel, temperature, oil pressure, and economy.

Driver Assistance

Cruise Control:

Optional on many models.

Climate Control:

Manual or optional automatic climate control (ECC - Electronic Climate Control).

Connectivity

Bluetooth:

Not available from factory.

Aux Input:

Not typically available from factory; aftermarket solutions common.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 7,500-10,000 miles or annually (check manual for specific recommendation)

Air Filter Replacement:

Every 15,000-30,000 miles or annually

Spark Plug Replacement:

Every 30,000 miles (typically copper plugs)

Timing Belt Replacement:

Crucial! Every 40,000-60,000 miles or 4-5 years (M20 is an interference engine).

Coolant Flush:

Every 2-3 years

Fluid Specifications

Brake Fluid Type:

DOT 3 or DOT 4 (check manual for exact spec)

Power Steering Fluid:

ATF Dexron II/III or Pentosin CHF 11 S (check manual)

Coolant Capacity:

Approx. 7 liters (7.4 US quarts)

Known Issues

Common Problems Engine:

Head gasket leaks, timing belt failure (if not replaced), fuel injector issues, idle control valve problems, distributor cap/rotor wear.

Common Problems Electrical:

Corrosion in connectors, failing fuel pump relays, dashboard illumination issues, headlight switch failure.

Common Problems Chassis:

Worn control arm bushings, shock absorber degradation, flex disc (guibo) failure in driveshaft, rear trailing arm bushings.

Common Problems Body:

Rust (especially around wheel wells, rocker panels, sunroof), sagging headliner, door seal deterioration.

Maintenance Schedule Details

Schedule Comprehensiveness:

Provides detailed mileage/time-based service schedules for all major components.

📚 Vehicle History

Brand Heritage

Bmw Legacy:

BMW has a long history of producing driver-focused, sporty automobiles, with the 3 Series being its core model for decades.

Model Evolution

E30 Introduction:

The E30 generation replaced the E21 3 Series and was produced from 1982 to 1994 (depending on market and body style).

325I Introduction E30:

The 325i variant, featuring the M20B25 engine, was introduced in 1987, succeeding the 323i.

Production

Production Years For 325I:

1987-1991 (for the specific model range covered by this manual)

Manufacturing Locations:

Primarily Germany, with some assembly in other locations.

Collectibility

Current Status:

Highly sought after by enthusiasts for its classic design, driving experience, and potential for modification.

🏆 Awards & Recognition

Recognitions

Car And Driver 10Best:

The E30 3 Series, including the 325i, was frequently featured on Car and Driver's '10Best' list during its production years.

Performance Car Of The Year:

Often praised by automotive journalists for its class-leading handling and performance.

Ratings

Long Term Reliability:

Generally considered reliable when properly maintained, with common age-related wear and tear.