🏷️ Basic Information

Make:

BMW

Model:

3-series / M3

Chassis Code:

E30

Model Year:

1989

Engine Codes Covered:

M20B25 (2.5L I6), M42B18 (1.8L I4 - likely for 318i/is variants if applicable in 1989,

Engine Codes Covered M3:

S14B23 (2.3L I4 - for M3)

👋 Introduction

Positioning:

The E30 chassis represented a significant evolution for BMW's compact executive car line, balancing sporty driving dynamics with premium build quality and advanced engineering for its era.

Competitors:

Competed with vehicles like the Mercedes-Benz 190E, Audi 80/90, and various sporty coupes/sedans from American and Japanese manufacturers.

Driving Dynamics:

Renowned for its excellent handling, rear-wheel-drive platform, and driver-focused cockpit. The M3 variant was homologated for motorsport and offered a more potent performance package.

Manual Value Proposition:

This manual is invaluable for E30 owners and technicians seeking precise, OEM-level repair and maintenance information, crucial for preserving the classic character and performance of these vehicles.

📋 Manual Details

Coverage:

All models & all repairs A-Z

Page Count:

Typically over 800 pages, though exact count may vary slightly by specific publisher edition.

Manual Type:

Service and Repair Manual

Language:

English

Format:

Likely Printed Book (standard for dealer manuals of this era); PDF versions may exist through third-party aggregators.

📖 Manual Coverage

Engine:

Engine mechanical, cooling system, lubrication system, fuel system (EFI), ignition system, emissions control.

Transmission:

Manual transmission (Getrag 260 for most RWD models), automatic transmission (ZF 4HP22 for most RWD models), clutch, driveline, differentials.

Brakes:

Front and rear brake systems (disc brakes), parking brake, ABS (if equipped).

Suspension Steering:

Front and rear suspension components (struts, control arms, bushings), power steering system, steering rack.

Electrical:

12V electrical system, battery, alternator, starter, lighting system, fuses, relays, wiring diagrams, engine control unit (ECU), diagnostics.

Body Chassis:

Body construction, exterior trim, interior trim, HVAC system, seats, doors, windows, body panels, chassis components.

Maintenance:

Scheduled maintenance, oil changes, filter replacements, tune-ups, fluid checks and changes.

Repair:

Engine overhaul, transmission rebuild, brake caliper replacement, suspension component repair, electrical component troubleshooting.

Diagnostics:

Troubleshooting guides for common issues, diagnostic trouble codes (DTCs) and procedures (OBD-I era).

Special Tools:

Identification and usage of specialized BMW tools for specific repair procedures.

Depth:

Comprehensive, covering everything from routine maintenance to complete engine and transmission overhauls. Detailed diagrams and torque specifications are included.

📊 Manual Specifications

File Format:

N/A (Assuming printed manual, not digital file)

Print Quality:

High-quality, dealership-grade printing with clear diagrams and legible text.

Binding Type:

Likely perfect-bound or spiral-bound for durability and ease of use in a workshop environment.

Paper Type:

Durable, often glossy or semi-gloss paper to withstand workshop conditions and ensure clarity of diagrams.

⚙️ Engine Specifications

Engine 325I:

M20B25, 2.5L (2494cc) SOHC inline-6

Engine M3:

S14B23, 2.3L (2302cc) DOHC inline-4 (based on M10 block, but significantly upgraded)

Horsepower 325I:

Approx. 168-170 hp @ 5800-6000 rpm

Torque 325I:

Approx. 220-225 Nm (162-166 lb-ft) @ 4000-4300 rpm

Horsepower M3:

Approx. 192-215 hp @ 6750 rpm (depending on specific M3 variant/market)

Torque M3:

Approx. 240-255 Nm (177-188 lb-ft) @ 4750-4800 rpm

Fuel System Type:

Bosch Motronic electronic fuel injection (EFI)

Fuel Type Required:

Premium Unleaded gasoline (91 octane or higher)

ECU Type:

Bosch Motronic (e.g., Motronic ML4.1, ML 5.1)

🔧 Transmission

Transmission 325I:

5-speed manual (Getrag 260)

Transmission M3:

5-speed manual (Getrag 265 - closer ratio than 325i)

Transmission 325I:

4-speed automatic (ZF 4HP22)

Clutch Type:

Hydraulically actuated single dry plate clutch.

Manual Transmission Fluid:

BMW ATF (Automatic Transmission Fluid) or equivalent SAE 75W-90 synthetic gear oil (check manual for precise spec).

Automatic Transmission Fluid:

Dexron III or equivalent ATF.

Differential Fluid:

SAE 75W-90 synthetic hypoid gear oil.

📐 Dimensions

Wheelbase:

Approx. 2565 mm (101 in)

Length:

Approx. 4345 mm (171 in)

Width:

Approx. 1675 mm (66 in)

Height:

Approx. 1370 mm (54 in)

Curb Weight 325I:

Approx. 1240-1300 kg (2734-2866 lbs)

Curb Weight M3:

Approx. 1200-1250 kg (2646-2756 lbs)

Gross Vehicle Weight Rating:

Typically around 1700-1800 kg (check specific model variation).

Wheel Bolt Pattern:

5x120

Standard Wheel Size:

15 inch (e.g., 15x7J) for most 325i, 15 or 16 inch for M3

Standard Tire Size:

205/55VR15 for 325i, 225/50VR16 for M3 (common sizes, check manual for exact specs).

🛡️ Safety Features

Crash Testing:

While official NHTSA/IIHS ratings for this era are not as comprehensive as today, the E30 was known for its robust construction and safety cell. Specific ratings may not be readily available for this model year.

ABS:

Anti-lock Braking System (ABS) was optional on most 325i models and standard on M3. Covered in detail in the manual.

Traction Control:

Traction control was generally not available on E30 models, including 1989.

Seat Belts:

Three-point inertia reel seatbelts for front occupants, lap belts for rear occupants. Manual details their adjustment and maintenance.

Airbags:

Airbags were not standard or typically available on 1989 E30 models. Steering wheel and dashboard construction is relevant for impact absorption.

💡 Technology Features

Audio System:

Factory-installed radio/cassette player (e.g., Blaupunkt, Becker). Manual covers basic operation and fuse locations.

Cruise Control:

Optional on many models, operated via stalk on the steering column. Manual details its function and troubleshooting.

Diagnostic Port:

OBD-I style diagnostic connector, typically under the hood or in the engine bay, used for basic engine fault code retrieval. Manual explains access and interpretation.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, depending on driving conditions. Manual will specify exact intervals.

Spark Plug Replacement:

Every 20,000-30,000 miles (32,000-48,000 km) for standard plugs. Manual specifies exact type and interval.

Timing Belt Replacement:

M20 engine (325i) uses a timing belt, typically replaced every 40,000-60,000 miles (64,000-96,000 km). S14 engine (M3) also uses a timing belt. Critical replacement interval detailed in manual.

Coolant Flush:

Every 2-3 years or specified mileage. Manual will detail coolant type and capacity.

Engine Oil Spec:

Typically 20W-50 or 15W-40 for M20 engines; 10W-40 or 20W-50 for S14 engines in moderate climates. Manual specifies exact API/ACEA ratings and viscosity.

Coolant Type:

Ethylene glycol-based coolant, typically a 50/50 mix with distilled water. Manual specifies BMW antifreeze type.

Common Issues E30:

Cooling system (leaks, radiator, hoses), fuel pump failure, odometer gear failure, sway bar links, oil pan gasket leaks, heater control valve failures, window regulator issues, rust in common areas (wheel wells, rocker panels).

Common Issues M3:

S14 engine specific: valve seal wear, VANOS issues (if applicable on later models/variants - unlikely on 1989), oil consumption. Differential mounts, subframe bushings.

Engine Head Bolt Torque:

Detailed multi-stage torque sequence and angle tightening procedures provided in manual for cylinder head removal/installation.

Wheel Lug Bolt Torque:

Typically 110-130 Nm (81-96 ft-lbs). Manual confirms exact torque.

📚 Vehicle History

Bmw Philosophy:

BMW's reputation for 'The Ultimate Driving Machine' was solidified with the E30 generation, emphasizing performance, handling, and driver engagement.

E30 Generation:

The E30 was produced from 1982 to 1994 (depending on market and body style). The 1989 model year represents a mid-to-late lifecycle update for the E30, with subtle styling and technical refinements.

E30 Variants:

Included sedans (2-door and 4-door), coupes, convertibles, and the highly sought-after M3 homologation special. Touring (wagon) versions were limited to some markets. This manual covers the core sedan/coupe/M3 variants.

Production Locations:

Primarily Germany (Munich, Dingolfing). Limited assembly may have occurred in other locations.

Production Volume:

Over 2.3 million E30s were produced worldwide, making it a very popular and successful BMW model.

🏆 Awards & Recognition

E30 Legacy:

The E30 series is widely recognized as a benchmark for affordable sports sedans and coupes. It is consistently ranked among the best driver's cars of its era and is a popular choice for enthusiasts and collectors. The M3 variant is particularly celebrated for its racing pedigree.

Contemporary Reviews:

Car and Driver, MotorTrend, and other automotive publications consistently praised the E30's handling, build quality, and performance. Specific awards may vary by publication and year.