Vehicle Class:
Compact Executive Sedan/Coupe/Convertible
Target Audience:
Enthusiasts and owners seeking detailed maintenance and repair information
Competitors:
Mercedes-Benz W201 (190E), Audi 80/90, Alfa Romeo 75, Volvo 240
Vehicle Attributes:
Rear-wheel drive, balanced handling, driver-focused cockpit, iconic design
Manual Value Proposition:
Empowers owners to perform complex maintenance and repairs, reducing dealership costs and preserving vehicle integrity
Engine:
Complete overhaul, diagnosis, tuning, fuel injection (Bosch L-Jetronic/Motronic), ignition system, cooling system, exhaust system
Transmission:
Manual and Automatic transmission repair, clutch, drivetrain components, driveshafts, differentials
Brakes:
Hydraulic system, disc/drum brakes, ABS (if applicable), parking brake, fluid specifications
Suspension:
Front and rear suspension, steering system, wheel alignment specifications, shock absorbers, springs
Electrical:
Wiring diagrams, lighting system, charging system, starting system, instrumentation, fuses, relays, ECU diagnostics
Bodywork:
Body panel repair, interior trim, doors, windows, sunroof, seals, body hardware
HVAC:
Heating, ventilation, and air conditioning system diagnosis and repair
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks, belt adjustments, tune-ups
Troubleshooting:
Diagnostic flowcharts, symptom-based troubleshooting guides, common fault diagnosis
Repair:
Step-by-step repair procedures for all major mechanical and electrical components
Diagnosis:
Component testing, electrical circuit analysis, engine performance diagnostics
Rebuild:
Detailed engine and transmission rebuild procedures with specifications
Depth:
Comprehensive, covering basic maintenance to complete engine/transmission rebuilds and advanced electrical diagnostics
Transmission Type:
4-speed Manual
Transmission Type:
3-speed Automatic (ZF 3HP22)
Clutch Type:
Single dry plate, hydraulically operated
Manual Transmission Fluid:
API GL-4 SAE 75W-90 or SAE 80W-90 gear oil (consult manual for exact BMW specs)
Automatic Transmission Fluid:
BMW ATF Dexron II (or equivalent)
Crash Test Performance:
Generally good for its era, but lacks modern safety structures. Specific official ratings may vary.
Braking System:
Power-assisted front discs, rear drums. Optional ABS available on later models.
Steering:
Recirculating ball steering. Power steering often optional or standard on higher trims.
Seatbelts:
Front and rear seat belts. Front 3-point inertia reel belts.
Body Structure:
Reinforced passenger cell, crumple zones
Audio System:
Factory fitted radio/cassette player, often with limited speaker count. Upgrades common.
ABS:
Optional on some models, typically on 325i and later E30s. Manual covers diagnosis if equipped.
Diagnostics:
On-board diagnostics via basic code blinking system (older) or early Motronic unit. Manual details diagnostic connectors and procedures.
Oil Change Interval:
Every 10,000-15,000 km or 6-12 months (whichever comes first)
Air Filter Replacement:
Every 20,000-30,000 km
Spark Plug Replacement:
Every 40,000-60,000 km (depending on plug type)
Engine Oil:
API SG/SH, SAE 10W-40 or 15W-40 (verify with manual for ambient temps and BMW approvals)
Coolant:
BMW Blue Antifreeze (G48 ethylene glycol based) or equivalent with corrosion inhibitors
Brake Fluid:
DOT 3 or DOT 4
Common Problems:
Cooling system leaks (water pump, hoses, radiator), fuel distributor issues, idle control valve problems, rust (especially wheel wells, sills), heater core leaks, worn suspension bushings, ignition system components
Valve Lash Adjustment:
Required periodically; specific clearance values in manual.
Ignition Timing:
Specific degrees BTDC at idle with vacuum advance disconnected; detailed in manual.
Brand Philosophy:
Sheer Driving Pleasure, performance, engineering excellence
E30 Introduction:
Introduced in 1982 as a replacement for the E21, the E30 was a significant step forward in BMW's lineup.
318I Positioning:
Positioned as the entry-level sedan/coupe in the E30 range, offering a balance of efficiency and BMW driving dynamics.
Production Period:
1982-1994 (E30 generation overall), 1984-1990 for 318i E30 sedan/coupe/convertible
Manufacturing Locations:
Germany (Dingolfing, Munich), South Africa, Mexico, Thailand
