Segment:
Compact Executive/Sport Sedan
Target Audience:
Enthusiasts, independent repair shops, DIY mechanics seeking comprehensive repair information for the E30 320i.
Competitors:
Mercedes-Benz W201 (190E), Audi 80/90, Volvo 240, Alfa Romeo 75
Driving Dynamics:
Renowned for its balanced chassis, rear-wheel-drive dynamics, and driver-focused cockpit.
Build Quality:
Typical BMW build quality of the era, known for durability and longevity when properly maintained.
Powertrain:
Engine, Fuel System, Ignition System, Cooling System, Exhaust System, Transmission (Manual & Automatic), Drivetrain (Rear Axle, Driveshaft)
Chassis:
Suspension (Front & Rear), Steering System, Brakes (Front Disc, Rear Drum/Disc), Wheels & Tires
Electrical:
Wiring Diagrams, Lighting System, Gauges & Instruments, Power Accessories, Starter & Charging System, Engine Control Unit (ECU) & Sensors
Body:
Body Panels, Doors, Windows, Locks, Bumpers, Interior Trim, HVAC System
Climate Control:
HVAC system diagnosis and repair, including blower motor, heater core, evaporator, and refrigerant system (where applicable for the era).
Maintenance:
Oil Changes, Filter Replacements, Spark Plug Service, Coolant Flushes, Belt Adjustments/Replacement, Brake Fluid Flush, Tune-Ups
Repair:
Engine Overhaul, Transmission Rebuild, Suspension Component Replacement, Brake System Repairs, Electrical Component Diagnosis and Replacement, Body Panel Repair and Refinishing
Troubleshooting:
Diagnostic procedures for engine performance issues, electrical faults, HVAC problems, brake system malfunctions, and more, often with flowcharts and symptom-based guides.
Diagnostics Procedures:
Includes diagnostic flowcharts, troubleshooting guides for common faults, and component testing procedures.
Diagnostic Level:
Advanced diagnostics, including ECU fault code retrieval (where applicable for the era), sensor testing, and circuit analysis.
Rebuild Procedures:
Comprehensive rebuild procedures for major components like the engine, transmission, and differential, including torque specifications, clearances, and assembly sequences.
Special Tools:
Identification and usage of specific BMW special tools required for various repair and maintenance procedures.
Torque Specifications:
Detailed torque specifications for all critical fasteners and assemblies.
Searchability:
Searchable text content within the PDF for quick information retrieval.
Printability:
Printable pages for hands-on workshop use.
Image Resolution:
High-resolution images, diagrams, and schematics.
Binding:
N/A (Digital Download)
Paper:
N/A (Digital Download)
Document Type:
Comprehensive Service and Repair Manual
Engine Type:
Inline 6-cylinder, SOHC
Displacement:
1990 cc (2.0 Liters)
Bore X Stroke:
80.0 mm x 66.0 mm
Engine Management:
Bosch L-Jetronic Fuel Injection and Ignition System
Horsepower:
125 hp (93 kW) @ 6000 rpm (approx.)
Torque:
174 Nm (128 lb-ft) @ 4300 rpm (approx.)
Fuel Delivery:
Bosch LE-Jetronic Electronic Fuel Injection
Fuel Type:
Unleaded Gasoline (Premium Recommended)
Fuel Pump Pressure:
Refer to manual for specific pressure specifications (typically 3-5 bar).
Crash Test Data:
Limited official crash test data available for this model year from major agencies like NHTSA/Euro NCAP compared to modern standards. Refer to historical safety reviews for qualitative assessments.
ABS:
Anti-lock Braking System (ABS) available as an option on some models, particularly later E30s and specific export markets.
Seatbelts:
Three-point seatbelts in the front, two-point lap belts in the rear.
Structure:
Reinforced safety cell, crumple zones.
Radio:
Typically a Blaupunkt or Becker radio with AM/FM and cassette player. Basic analog tuning and volume controls.
Speakers:
Standard speaker configuration, often front door and rear parcel shelf. Upgrades may be available depending on trim.
ABS:
As mentioned in safety, ABS was an option, not standard across all 1988 320i models.
Cruise Control:
Optional on some models, typically vacuum-operated.
Connectivity Features:
No modern connectivity features (e.g., Bluetooth, USB, smartphone integration) as standard. Focus is on analog systems.
Oil Change Interval:
Every 7,500 - 10,000 miles (12,000 - 15,000 km) or annually, whichever comes first (recommend consulting manual for precise interval based on driving conditions).
Air Filter Replacement:
Every 15,000 - 30,000 miles (24,000 - 48,000 km).
Spark Plug Replacement:
Every 20,000 - 30,000 miles (32,000 - 48,000 km) for standard plugs. Refer to manual for exact type and interval.
Timing Belt Replacement:
The M20 engine uses a timing belt. Replacement is critical, typically recommended every 50,000 - 70,000 miles (80,000 - 112,000 km) or 5 years. Failure can cause catastrophic engine damage. Refer to manual for exact interval and procedure.
Engine Oil Type:
SAE 10W-40 or 15W-50 (refer to manual for specific BMW approval and viscosity recommendations based on climate).
Coolant Type:
Ethylene Glycol based coolant, typically a 50/50 mix with distilled water. BMW coolant or equivalent. Refer to manual for BMW PN.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Cooling System:
Water pump failures, radiator leaks, thermostat issues, and hose degradation are common due to age.
Fuel System:
Clogged fuel injectors, failing fuel pumps, and aged fuel lines can cause performance issues.
Electrical:
Degrading wiring harness insulation, failing alternator, starter motor issues, and intermittent electrical gremlins are not uncommon in vehicles of this age.
Suspension:
Worn control arm bushings, ball joints, and shock absorbers can lead to imprecise handling and noise.
Interior:
Deterioration of dashboard materials, headliner sagging, and non-functional power accessories.
Brand Focus:
BMW has a long-standing heritage in producing performance-oriented vehicles with a focus on driving dynamics and engineering excellence.
E30 Introduction:
The E30 platform was introduced in 1982, replacing the E21. The 320i variant was a key model in the European market.
1988 Updates:
For the 1988 model year, the E30 received minor updates, often including slight interior refinements and potentially revised options lists. The M20 engine received Bosch L-Jetronic for improved emissions and fuel economy.
Production Era:
1982-1994 (for E30 platform)
Manufacturing Locations:
Germany (primarily Dingolfing and Munich)
