Segment:
Compact Executive Sedan/Coupe
Target Audience:
Enthusiasts, DIY mechanics, professional repair shops seeking detailed technical information for the E30 generation 3 Series.
Key Competitors 1990:
Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, Saab 900.
Brand Philosophy:
BMW's focus on 'Ultimate Driving Machine,' characterized by sporty handling, responsive engines, and driver-centric design.
Vehicle Strengths:
Excellent chassis dynamics, reliable powertrain (with proper maintenance), build quality, iconic design.
Engine Mechanical:
Engine assembly, disassembly, cylinder head, pistons, crankshaft, camshaft, timing, lubrication system, cooling system, fuel system (carburetor/early injection), exhaust system.
Engine Electrical:
Ignition system, starter, alternator, fuel injection (if applicable), engine control unit (ECU), sensors, wiring diagrams.
Transmission Drivetrain:
Manual and automatic transmission service, clutch, driveshaft, differential, axles.
Suspension Steering:
Front and rear suspension components, steering system, power steering, wheel alignment.
Brakes:
Brake system components (discs, pads, calipers, master cylinder, lines), ABS (if equipped), parking brake.
Electrical Systems:
Lighting, interior electronics, instrumentation, fuses, relays, battery, charging system, starter motor.
Body Chassis:
Body panels, doors, hood, trunk, glass, interior trim, chassis components, corrosion protection.
Heating Ventilation Air Conditioning:
HVAC system components, controls, refrigerant system (if applicable).
Routine Maintenance:
Oil changes, filter replacements, spark plug service, fluid checks and changes, belt inspections and replacement.
Troubleshooting:
Diagnostic procedures for common drivability issues, electrical faults, and mechanical problems, including symptom analysis and fault code interpretation (if applicable).
Repair Rebuild:
Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation of major systems.
Diagnostics:
Component testing procedures, electrical circuit diagnostics, using test equipment like multimeters and oscilloscopes.
Specifications Data:
Torque specifications, clearances, fluid capacities, wiring diagrams, component data.
Depth Of Information:
Comprehensive, covering everything from basic adjustments to complete engine and transmission overhauls.
Engine Type:
Inline 4-Cylinder, SOHC (M20B20)
Displacement:
1990 cc (2.0 Liters)
Horsepower Ps:
129 PS @ 5800 rpm (approximate, may vary by market)
Torque Nm:
174 Nm @ 4000 rpm (approximate, may vary by market)
Fuel Delivery:
Bosch L-Jetronic Fuel Injection (primarily) or Carburetor in some markets.
Recommended Octane:
91-95 RON (Research Octane Number)
Oil Type:
API SG or higher, SAE 15W-40 or 10W-40 (refer to manual for specific BMW approval)
Oil Capacity Liters:
4.25 Liters (with filter)
Coolant Type:
BMW Blue Antifreeze/Coolant (G48 standard)
Coolant Capacity Liters:
7.5 Liters (approximate)
Transmission Type:
Getrag 260 5-speed Manual Transmission
Transmission Type:
ZF 4HP22 4-speed Automatic Transmission
Manual Fluid Type:
BMW MTF LT-2 or equivalent (e.g., Red Line MTL)
Automatic Fluid Type:
Dexron III (or compatible ATF)
Manual Capacity Liters:
1.4 Liters (Getrag 260)
Automatic Capacity Liters:
6.0 Liters (ZF 4HP22, dry fill)
Historical Safety Perception:
E30 generation known for solid build and predictable handling, though modern safety standards were less stringent.
ABS:
Optional ABS (Anti-lock Braking System) available on some models.
Traction Control:
Not typically available on 320i models of this year.
Airbags:
Driver's side airbag optional; passenger airbag not available.
Seatbelts:
Three-point inertia reel seatbelts in front and rear.
Body Structure:
Reinforced safety cage, crumple zones.
Oil Change:
Every 7,500 - 10,000 miles or 12 months (synthetic oil recommended for longer intervals).
Air Filter:
Inspect every 15,000 miles, replace as needed or every 30,000 miles.
Spark Plugs:
Replace every 30,000 miles (check manual for specific plug type).
Coolant Flush:
Every 2-3 years or 30,000 miles.
Transmission Fluid:
Manual: Inspect every 30,000 miles, change if discolored or contaminated. Automatic: Change every 50,000-60,000 miles.
Brake Fluid:
DOT 3 or DOT 4.
Power Steering Fluid:
ATF Dexron II/III or specific BMW fluid.
Common Problems E30 320I:
Head gasket leaks (M20 engine), coolant leaks (plastic expansion tank, hoses), fuel pump failure, idle control valve issues, rust in common areas (wheel arches, rocker panels, jacking points), worn suspension bushings, dashboard cracks.
Oil Filter Oem:
BMW 11 42 1 730 942 (or equivalent Mann-Filter, Mahle)
Air Filter Oem:
BMW 13 72 1 730 944 (or equivalent Mann-Filter, Mahle)
Bmw Legacy:
BMW has a long history of producing premium, driver-focused vehicles, emphasizing performance and engineering excellence since its inception.
E30 Generation:
The E30 platform (1982-1991) was a pivotal generation for the 3 Series, establishing its reputation for handling and luxury. The 320i was a popular entry-level model within this range.
Production Years E30:
1982-1991 (Global); 1990 model year falls within the later stages of E30 production.
Manufacturing Locations:
Germany (Dingolfing, Munich), South Africa, USA (CKD assembly).
