Market Segment:
Entry-level luxury compact sports sedan/coupe. Competed against models like Mercedes-Benz 190E, Audi 80/90, and Peugeot 405.
Key Competitors:
Mercedes-Benz W201 (190E), Audi Typ 89 (80/90), Volvo 240, Alfa Romeo 75.
Platform Significance:
The E30 platform marked BMW's successful entry into a broader market segment while retaining its core driving dynamics and build quality.
Target Audience:
Enthusiast drivers, professionals seeking a compact luxury vehicle with sporty credentials.
Covered Years:
1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991
Manual Type:
Workshop Service Repair Manual
Format:
PDF (Digital Download)
Engine Mechanical:
Full coverage: engine assembly, cylinder head, crankshaft, pistons, connecting rods, valve train, timing belt/chain, lubrication system, cooling system.
Engine Management:
Fuel injection system (L-Jetronic, Motronic variants), ignition system, emissions control systems, diagnosis and troubleshooting of electronic control units (ECUs).
Transmission Manual:
Repair and overhaul of manual gearboxes, clutch system, driveshafts, differential.
Transmission Automatic:
Diagnosis, maintenance, and repair procedures for automatic transmissions (if applicable to 318 variants of this era).
Brakes:
Front and rear brake systems (disc/drum configurations), hydraulic systems, parking brake, ABS (if equipped).
Suspension:
Front and rear suspension components, shock absorbers, springs, control arms, bushings, steering knuckles.
Steering:
Steering rack, power steering system (if equipped), steering column, linkage.
Electrical System:
Battery, charging system (alternator), starting system (starter motor), lighting system, fuses, relays, wiring diagrams.
Body And Interior:
Body panel removal and installation, interior trim, seats, doors, windows, locks, HVAC system.
Scheduled Maintenance:
Detailed service intervals for oil changes, filter replacements, fluid checks, spark plugs, ignition timing, drive belts.
Diagnostic Troubleshooting:
Step-by-step diagnostic procedures for common problems, fault code interpretation (where applicable).
Repair And Overhaul:
Comprehensive instructions for disassembly, inspection, repair, and reassembly of all major mechanical and electrical components.
Specification Data:
Torque specifications, clearances, fluid capacities, engine timing settings, electrical resistance values.
Technical Depth:
Comprehensive, covering everything from basic maintenance tasks to complete engine and transmission overhauls and advanced electrical system diagnostics.
Engine Type:
Inline 4-cylinder, SOHC (M10)
Displacement:
1.8 Liters (1766 cc)
Bore X Stroke:
89.0 mm x 71.0 mm
Compression Ratio:
Typically 9.5:1 or similar, depending on specific variant.
Horsepower:
Approximately 105-115 hp @ 5800-6000 rpm (variant dependent).
Torque:
Approximately 110-120 lb-ft @ 3500-4000 rpm (variant dependent).
Fuel Delivery:
Bosch L-Jetronic or Motronic fuel injection system.
Fuel Type:
Unleaded Gasoline (Premium/Octane rating dependent on region).
Ignition Type:
Electronic Ignition (Distributor-based or distributorless in later models).
Transmission Type Standard:
4-speed or 5-speed Manual Transmission.
Transmission Type Optional:
3-speed or 4-speed Automatic Transmission (ZF or equivalent).
Clutch Type:
Single dry plate, hydraulically operated.
Final Drive:
Rear Wheel Drive (RWD) with limited-slip differential (LSD) as an option on some models.
Length:
Approx. 4340 mm (170.9 in)
Width:
Approx. 1675 mm (65.9 in)
Height:
Approx. 1380 mm (54.3 in)
Wheelbase:
Approx. 2570 mm (101.2 in)
Curb Weight:
Approx. 1150-1250 kg (2535-2755 lbs), depending on body style and equipment.
Crash Test History:
No standardized global crash ratings like NHTSA or Euro NCAP in the modern sense were widely publicized for this era. However, the E30 was known for its robust structure.
ABS:
Optional Anti-lock Braking System (ABS) available on later models or as a higher-trim option.
Seatbelts:
Three-point inertia-reel seatbelts with pre-tensioners (front), two-point lap belts (rear) standard. Optional rear three-point belts.
Body Structure:
Reinforced safety cage, crumple zones front and rear.
Oil Change Interval:
Typically every 5,000-7,500 miles (8,000-12,000 km) or annually, whichever comes first, depending on driving conditions and oil quality.
Spark Plug Replacement:
Approximately every 20,000-30,000 miles (32,000-48,000 km), depending on plug type (e.g., copper vs. platinum).
Timing Belt Replacement:
The M10 engine uses a timing chain, which is generally designed for the life of the engine. However, tensioners and guides may require inspection/replacement as part of major overhauls.
Engine Oil Type:
API SG/SH or higher, SAE 10W-40 or 15W-40 recommended for most climates. Consult manual for specific BMW approvals (e.g., BMW Special Oil).
Engine Oil Capacity:
Approx. 4.25 Liters (4.5 US Quarts) with filter change.
Coolant Type:
Ethylene glycol-based antifreeze with corrosion inhibitors. BMW recommends specific coolant types (e.g., BMW Blue or Green coolant).
Transmission Fluid Manual:
API GL-4 SAE 75W-90 or 80W-90 gear oil.
Transmission Fluid Automatic:
ATF Dexron II or Dexron III compatible fluid.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Rust Corrosion:
Common E30 issue: rust can affect wheel arches, rocker panels, sills, battery tray, and around the windshield.
Fuel Delivery System:
Fuel pump failure, clogged injectors, aging fuel lines, and issues with the fuel pressure regulator.
Cooling System:
Leaking radiators, cracked hoses, faulty thermostat, and potential head gasket issues if overheated.
Electrical Component Failure:
Aging wiring harnesses, failing relays, blower motor resistors, and instrument cluster issues are not uncommon.
Suspension Wear:
Worn control arm bushings, ball joints, tie rod ends, and shock absorbers can lead to imprecise handling and noises.
Bmw Philosophy:
BMW's long-standing reputation for building driver-focused, sporty sedans and coupes with excellent engineering and build quality.
E30 Generation:
The E30 was the second generation of the BMW 3 Series, produced from 1982 to 1991. It replaced the E21 and laid the groundwork for future 3 Series generations.
318 Positioning:
The 318i was the entry-level model, offering a more accessible price point into the premium 3 Series range, often powered by the robust M10 engine.
Production Years:
1983-1991 (for the E30 318i model covered).
Manufacturing Locations:
Primarily Germany (Munich, Dingolfing), with potential assembly in other BMW facilities globally.
Automotive Press Reviews:
Consistently praised by automotive journalists of the era for its engaging driving dynamics, balanced chassis, and solid build quality. Often cited as a benchmark for handling in its class.
Historical Reputation:
The E30 3 Series, including the 318i, has achieved legendary status among enthusiasts and is considered one of BMW's most iconic generations.
