🏷️ Basic Information

Make:

BMW

Model:

318i

Year:

1990

Chassis Code:

E30

Engine Code:

M40B18

👋 Introduction

Positioning:

The BMW 318i (E30) was positioned as a compact executive sports sedan, offering a balance of performance, luxury, and driving dynamics. It was a significant model for BMW, contributing to its reputation for sporty handling and build quality in the premium compact segment.

Competitors:

Key competitors included the Mercedes-Benz 190E, Audi 80/90, and various models from Japanese luxury brands like Lexus and Acura (though the latter emerged slightly later in the E30's lifecycle). The E30 3 Series was often lauded for its superior driving engagement.

Highlights:

Rear-wheel drive chassis, robust engineering, driver-focused cockpit, excellent handling, durable inline-4 engines, iconic BMW design language.

📋 Manual Details

Coverage:

Full Service, Repair, Workshop, Diagnostics, Troubleshooting, Maintenance, Electrical Systems, Engine Overhaul, Transmission Repair, Bodywork, Suspension, Brakes, HVAC, Fuel System, Emission Control, Drivetrain, Interior Components, Exterior Components.

Pages:

Estimated 1500+ (typical for comprehensive E30 service manuals)

Type:

Service Repair Workshop Manual

Language:

English

Format:

Digital (likely PDF, or potentially a collection of scanned documents)

📖 Manual Coverage

Engine:

1.8L M40B18 Inline-4, Engine Mechanicals, Cooling System, Lubrication System, Fuel Injection System (Bosch Motronic), Ignition System, Emission Control Systems (Catalytic Converter, EGR - if applicable).

Transmission:

Getrag 240 5-Speed Manual Transmission, Automatic Transmission (optional), Clutch System, Drive Axles, Differential.

Brakes:

Front Ventilated Discs, Rear Solid Discs, ABS (Anti-lock Braking System), Brake System Hydraulics, Parking Brake.

Suspension:

Front MacPherson Struts, Rear Semi-Trailing Arms, Shock Absorbers, Springs, Bushings, Steering System (Power Steering - if equipped).

Electrical:

12V Electrical System, Battery, Alternator, Starter Motor, Lighting System, Instrumentation, Wipers, Washers, Horn, Power Windows, Central Locking (if equipped), Fuse Box Diagrams, Relay Locations, Wiring Diagrams for all major systems.

Bodywork:

Body Panel Removal and Installation, Door Mechanisms, Window Regulators, Sealing Systems, Corrosion Protection.

Maintenance:

Oil and Filter Changes, Air Filter Replacement, Spark Plug Replacement, Coolant Flush, Brake Fluid Flush, Belt Inspection and Replacement, Tune-Up Procedures, Tire Rotation and Balancing.

Repair:

Engine Tune-Up, Valve Adjustment, Cylinder Head Gasket Replacement, Piston and Ring Replacement, Crankshaft and Bearing Replacement, Fuel Injector Replacement, Ignition Coil Replacement, Radiator Replacement, Water Pump Replacement, Thermostat Replacement, Clutch Replacement, Transmission Overhaul, Brake Pad and Rotor Replacement, Shock Absorber Replacement, Steering Rack Replacement, Alternator Replacement, Starter Motor Replacement, Wiper Motor Replacement, Window Motor Replacement.

Diagnostics:

Troubleshooting Guides for common problems, Symptom-based diagnosis, Diagnostic Trouble Codes (DTCs) and their meanings (if applicable to the era/system), Testing of sensors and actuators.

Depth:

Comprehensive. Covers basic maintenance to full engine and transmission rebuilds, detailed electrical schematics, and diagnostic procedures. Suitable for professional mechanics and advanced DIY enthusiasts.

📊 Manual Specifications

File Format:

Likely PDF. High-resolution scans of original documents, potentially searchable text if OCR was performed.

Quality:

Varies by source, but typically aims for clarity of text and diagrams. Original print quality of factory manuals is excellent.

Binding:

N/A (for digital format). If printed, would typically be a robust comb or spiral binding for lay-flat use.

Paper:

N/A (for digital format). Original manuals used durable, matte-finish paper suitable for workshop environments.

⚙️ Engine Specifications

Engine Type:

Naturally Aspirated Inline 4-Cylinder

Engine Code:

M40B18

Displacement:

1.8 Liters (1796 cc)

Horsepower:

Approx. 113-115 hp @ 5500-6000 RPM

Torque:

Approx. 116-118 lb-ft @ 3250-4300 RPM

Injection Type:

Bosch Motronic Electronic Fuel Injection (EFI)

Fuel Type:

Unleaded Gasoline (91+ Octane Recommended)

Coolant Type:

BMW Blue or Green Ethylene Glycol Based Coolant (50/50 Mix with Distilled Water)

🔧 Transmission

Type:

Getrag 240 5-Speed Manual

Clutch Type:

Hydraulically Actuated Single Dry Plate

Type:

ZF 4HP22 4-Speed Automatic Transmission

Fluid Type Manual:

GL-4 Gear Oil (e.g., Castrol Syntrans 75W-90 or similar spec)

Fluid Type Automatic:

Dexron III ATF (or equivalent)

📐 Dimensions

Length:

Approx. 4330 mm (170.5 in)

Width:

Approx. 1675 mm (66.0 in)

Height:

Approx. 1380 mm (54.3 in)

Curb Weight:

Approx. 1240 kg (2734 lbs)

Wheelbase:

Approx. 2570 mm (101.2 in)

Wheel Bolt Pattern:

5x120mm

Wheel Offset:

ET20 to ET25 (typical for E30 models)

🛡️ Safety Features

Crash Test Results:

No standardized crash test ratings as per modern NHTSA/Euro NCAP protocols exist for this era. However, the E30 chassis was known for its robust safety cell and progressively deforming crumple zones.

ABS:

Optional on some models, standard on others. If equipped, the Bosch ABS system is covered.

Airbags:

Not typically equipped with driver or passenger airbags in 1990 models. Safety focus was on seat belts and chassis integrity.

Seatbelts:

3-point inertia reel seatbelts (front and rear)

💡 Technology Features

Radio:

Factory fitted radio cassette player (various brands like Blaupunkt, Becker, or Grundig depending on market). Often features analog tuning, balance/fader controls.

Speakers:

Typically 4-6 speakers (doors, rear parcel shelf).

ABS:

Anti-lock Braking System was an optional feature, significantly enhancing braking safety when equipped.

Connectivity Options:

None by modern standards. Connectivity was limited to the car's internal systems and aftermarket radio upgrades.

Climate Control:

Manual HVAC system with effective heating and optional air conditioning. Often controlled via a simple slider or knob system.

Power Accessories:

Optional power windows, power mirrors, central locking, and sunroof.

🔧 Maintenance

Oil Change:

Every 5,000 - 7,500 miles (8,000 - 12,000 km) or annually, depending on driving conditions. Refer to manual for exact interval.

Spark Plugs:

Typically every 20,000 - 30,000 miles (32,000 - 48,000 km) for standard plugs, or longer for platinum/iridium if fitted.

Coolant Flush:

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

Timing Belt:

CRITICAL: The M40 engine uses a timing belt. Replacement recommended every 40,000-50,000 miles (60,000-80,000 km) or 4-5 years due to risk of catastrophic engine damage if it breaks.

Engine Oil:

API SG or higher, SAE 10W-40 or 5W-30 (depending on climate). BMW approved oils are recommended.

Engine Oil Capacity:

Approx. 4.25 Liters (4.5 US Quarts) with filter change.

Brake Fluid:

DOT 4 Low Viscosity (LV) Brake Fluid.

Power Steering Fluid:

ATF Dexron III or BMW approved power steering fluid.

Common Failures:

Dashboard illumination/gauge cluster issues, Heater core leaks, Sagging headliner, Rust (wheel arches, rocker panels, strut towers), Idle control valve issues, Starter motor solenoid failure, Cooling fan clutch failure, Timing belt failure (if not replaced regularly).

Maintenance Recommendations:

Regular inspection and replacement of rubber components (hoses, belts, bushings), diligent timing belt replacement, and addressing any early signs of rust are crucial for E30 longevity.

📚 Vehicle History

Heritage:

BMW has a long-standing reputation for building driver-focused, sporty, and well-engineered vehicles, particularly with its 3 Series line, which is considered a benchmark for compact executive cars.

E30 Generation:

The E30 generation (1982-1994) was a pivotal model for BMW, establishing the brand's dominance in the compact executive segment. The 318i represented the entry-level offering in many markets during the later years of the E30's production.

Production Period:

1990 model year.

Manufacturing Locations:

Primarily Germany (Munich, Dingolfing).

🏆 Awards & Recognition

Car And Driver:

The E30 generation, including models like the 318i, was frequently lauded by automotive publications like Car and Driver for its exceptional handling and driving dynamics, often appearing on '10 Best Cars' lists in various configurations.

User Satisfaction:

Highly regarded by enthusiasts for its robustness and driving pleasure, although specific owner satisfaction surveys from the era are less common than modern ones.

Technical Manual Quality:

Factory service manuals of this era are considered the 'gold standard' for repair information, providing the exact procedures and specifications used by BMW technicians.