🏷️ Basic Information Identification Make: BMW Model: M3 (E30) Production Years Covered: 1986, 1987, 1988, 1989, 1990, 1991, 1992 Codes Chassis Code: E30 Engine Code Primary: S14 👋 Introduction Market Position Segment: Performance Sports Coupe / Sedan Philosophy: Homologation special for Group A touring car racing, emphasizing driving dynamics and motorsport heritage. Competitive Analysis Key Rivals: Ford Sierra RS Cosworth, Mercedes-Benz 190E 2.3-16/2.5-16, Alfa Romeo 75 Evoluzione Key Features Handling: Renowned for exceptional chassis balance, precise steering, and track-focused suspension setup. Engine: High-revving, naturally aspirated four-cylinder S14 engine derived from BMW's M10 block. Aerodynamics: Distinctive front air dam, rear spoiler, and box flares for improved aerodynamic efficiency and downforce. 📋 Manual Details Coverage Areas Region Coverage: Global (primarily European and North American specifications) Trim Level Coverage: All M3 variants (e.g., standard M3, Evolution models) Page Count Estimated Page Count: 1000+ Manual Type Type: Service and Repair Workshop Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel system, ignition system, exhaust system, lubrication system Drivetrain: Transmission (manual), clutch, driveshafts, differential, axles Suspension: Front suspension, rear suspension, steering system Brakes: Front brakes (discs), rear brakes (discs), ABS (if equipped), brake hydraulics Electrical: Wiring diagrams, battery, alternator, starter, lighting, instrumentation, comfort electronics Bodywork: Body shell repair, exterior panels, interior trim, glass, seals Procedures Included Maintenance: Oil changes, filter replacements, fluid checks, spark plug replacement, belt inspection/replacement Repair: Engine component overhauls (pistons, rings, valves), transmission rebuild, brake caliper replacement, suspension component renewal Diagnostics: Troubleshooting guides for common issues, electrical system fault finding Adjustments: Valve clearance adjustment, idle speed adjustment, clutch adjustment Technical Depth Depth: Comprehensive: Covers routine maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures. 📊 Manual Specifications File Format Searchability: Searchable text within PDF for quick information retrieval Image Quality: High-resolution diagrams and photographs Printable: Printable pages for workshop use Binding Type Type: N/A (Digital PDF) Paper Type Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Name: S14 Engine Type: Inline-4, Naturally Aspirated Displacement: 2302 cc (2.3 L) Bore X Stroke: 93.7 mm x 84.0 mm Compression Ratio: 10.5:1 Performance Horsepower: 192 hp @ 6900 rpm (European spec), 200 hp @ 6900 rpm (Catalytic Converter spec) Torque: 230 Nm (170 lb-ft) @ 4750 rpm (European spec), 240 Nm (177 lb-ft) @ 4750 rpm (Catalytic Converter spec) Fuel System Fuel Delivery: Bosch Motronic electronic fuel injection (EFI) Fuel Type: Unleaded gasoline (95-98 RON recommended) Engine Components Cylinder Head: Dual overhead camshafts (DOHC), 4 valves per cylinder Crankshaft: Forged steel, 8-counterweight Lubrication Oil Capacity: Approx. 5.0 liters (5.3 US quarts) Oil Filter Part Number: Mann-Filter W 920/3, Mahle OC 100 (examples) Cooling System Coolant Capacity: Approx. 8.0 liters (8.5 US quarts) Coolant Type: BMW Blue Antifreeze (G48 specification) or equivalent ethylene glycol-based coolant 🔧 Transmission Standard Type: 5-speed manual transmission (Getrag 265/5) Gear Ratios Final Drive: 3.25:1 (common) Optional Type: N/A (All E30 M3 models were exclusively manual) Features Clutch Type: Hydraulically actuated, single-plate dry clutch Fluid Specifications Transmission Fluid Type: BMW ATF Dexron II/III or equivalent manual transmission fluid (e.g., Castrol Syntrans 75W-90) Fluid Capacities Transmission Oil Capacity: Approx. 1.3 liters (1.4 US quarts) 📐 Dimensions Exterior Length: 4340 mm (170.9 in) Width: 1675 mm (65.9 in) (non-flared models), 1700 mm (66.9 in) (flared models) Height: 1370 mm (53.9 in) Wheelbase: 2565 mm (101.0 in) Front Track: 1400 mm (55.1 in) Rear Track: 1420 mm (55.9 in) Weights Curb Weight: Approx. 1200-1250 kg (2646-2756 lb) Gross Vehicle Weight Rating: Approx. 1700 kg (3748 lb) Wheels Tires Wheel Size Standard: 15 x 7.0J (early models), 16 x 7.5J (later/optional) Tire Size Standard: 205/50 VR 15 (early models), 225/45 R 16 (later/optional) Bolt Pattern: 5 x 120 mm 🛡️ Safety Features Ratings Crash Test Results: N/A (Testing standards and availability varied significantly by region and era) Active Features Braking: Four-wheel disc brakes (vented front), Anti-lock Braking System (ABS) available on later models. Steering: Recirculating ball steering with power assistance, variable ratio steering (on some models). Passive Features Restraints: Three-point inertia-reel seatbelts, optional seatbelt pretensioners, front airbags not standard. Body Structure: Reinforced chassis and A-pillars, crumple zones. 💡 Technology Features Infotainment Audio System: Basic AM/FM radio with cassette player, optional CD player in later years. Speaker quality varied. Dashboard Controls: Driver-focused dashboard with analog gauges, physical controls for climate and audio. Driver Assistance ABS: Anti-lock Braking System (ABS) was an option, not standard on all models. Cruise Control: Optional on some models. Connectivity Bluetooth Usb: Not available in original equipment. 🔧 Maintenance Service Intervals Oil Change: Every 5,000 - 10,000 km (3,000 - 6,000 miles) or annually, depending on driving conditions. Spark Plugs: Check every 20,000 km (12,000 miles), replace every 40,000 - 60,000 km (24,000 - 36,000 miles). Valve Adjustment: Recommended every 40,000 - 60,000 km (24,000 - 36,000 miles) due to shims....