🏷️ Basic Information Identification Make: BMW Model: M3 Chassis Code: E30 Generation: First Generation Production Years: 1986-1991 (EU), 1987-1991 (NA) Model Years Covered: 1986-1992 👋 Introduction Market Position Market Position: Iconic homologation special and a benchmark performance car of its era. Competitive Analysis Competitors: Porsche 944, Mercedes-Benz 190E 2.3-16, Alfa Romeo 75 Quadrifoglio Key Features Key Features: Unique widebody styling, M-tuned suspension, high-revving S14 engine, homologation special for racing. 📋 Manual Details Coverage Coverage Areas: All Models / Engines / Trim / Transmission Types Format File Format: PDF/ZIP Delivery Method: Electronic Delivery via Email Language Language: English Printability Is Printable: Yes Type Manual Type: Service and Repair Manual Content Description: Comprehensive service, maintenance, and repair manual with step-by-step instructions and exploded views. Completeness Completeness Guarantee: Complete and intact, no missing/corrupt parts or pages. 📖 Manual Coverage Systems Systems Covered: General Information, Chassis, Powertrain, Electrical, Loads Procedures Procedures Included: Full maintenance, repair procedures, electrical information, troubleshooting. Depth Technical Depth: Covers standard service/repair shop level of detail. Electrical Electrical Coverage: Wiring diagrams, component testing, troubleshooting electrical faults, lighting, ignition, fuel injection systems. Chassis Chassis Coverage: Suspension (front strut, rear multi-link), steering, brakes, differential, drivetrain components, body structure. Powertrain Powertrain Coverage: Engine mechanicals (cylinder head, block, pistons, crankshaft), fuel system, cooling system, lubrication system, exhaust system, transmission overhaul. Procedures Included Engine Rebuild Procedures: Detailed instructions for engine disassembly, inspection, assembly, and tuning. Suspension Alignment: Specifications and procedures for front and rear wheel alignment. Body And Trim Repair: Information on body panel replacement, interior trim removal and installation. 📊 Manual Specifications File Quality File Quality: High Quality PDF Compatibility Operating Systems: Windows, Mac, Linux OS Print Quality Print Quality Description: All pages are printable for workshop use. ⚙️ Engine Specifications Primary Engine Engine Code: S14 Engine Type: Naturally Aspirated Inline-4 (DOHC) Displacement: 2.3 Liters (2302 cc) Bore X Stroke: 93.7 mm x 84.0 mm Compression Ratio: 10.5:1 Performance Horsepower Us Spec: 192 hp @ 6900 rpm Horsepower Eu Spec: 200 hp @ 6900 rpm (Catalytic Converter Equipped) Torque Us Spec: 170 lb-ft @ 4900 rpm Torque Eu Spec: 177 lb-ft @ 4750 rpm Fuel System Fuel System: Bosch L-Jetronic Fuel Injection Engine Management ECU Type: Bosch Motronic Ignition System: Distributorless Ignition System (DIS) Notes Engine Notes: Designed for motorsport homologation, featuring individual throttle bodies (ITBs) on some variants. 🔧 Transmission Standard Transmission Type: Getrag 265 5-Speed Manual Gear Ratios: Close-ratio, often with a dogleg 1st gear. Optional Optional Transmission: None for M3 model Fluid Spec Transmission Fluid Type: BMW Manual Gearbox Oil (e.g., Castrol SAF-XO or equivalent GL-4/GL-5) Clutch Clutch Type: Hydraulically actuated single-plate dry clutch 📐 Dimensions Exterior Length: Approx. 4340 mm (170.9 in) Width: Approx. 1700 mm (66.9 in) Height: Approx. 1370 mm (53.9 in) Wheelbase Wheelbase: Approx. 2562 mm (100.9 in) Weights Curb Weight: Approx. 1200-1250 kg (2645-2755 lbs) Wheels Tires Wheel Size: 15x7J (standard), 16x7.5J (optional) Bolt Pattern: 5x120 mm Tire Size Front: 205/55 VR 15 Tire Size Rear: 225/50 VR 15 🛡️ Safety Features Ratings Safety Ratings Era: Not standardized by modern crash test agencies like IIHS/NHTSA. Passive Features Passive Safety: Reinforced chassis, safety steering column, limited passive safety features by modern standards. Active Features Active Safety: Anti-lock Braking System (ABS) standard on most models. Brakes Front Brakes: Vented Discs, 280 mm diameter Rear Brakes: Solid Discs, 272 mm diameter 💡 Technology Features Infotainment Infotainment System: Basic analog gauges, optional period-correct cassette radio with amplifier. Driver Assistance Driver Assistance: ABS, power steering. Connectivity Connectivity Features: None by modern standards. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500-10,000 miles or 12 months, consult manual for specific conditions. Major Service Intervals: Includes timing belt, valve adjustment, spark plugs (consult manual for specific mileage/time intervals). Fluid Specifications Engine Oil Type: Synthetic 5W-30 or 5W-40, consult manual for specific BMW LL-XX approvals. Coolant Type: BMW Blue Antifreeze/Coolant or equivalent G48 ethylene glycol-based. Brake Fluid Type: DOT 4 Power Steering Fluid Type: BMW Power Steering Fluid (G002000 or equivalent ATF Dexron III) Known Issues Known Issues: Eccentric shaft wear (S14 engine), cracked exhaust manifolds, subframe mounting point fatigue, head gasket issues, seized brake calipers. Common Repairs Common Repairs: Bushings replacement (control arm, sway bar), fuel pump replacement, throttle body synchronization. Technical Specifications Valve Lash Adjustment Interval: Recommended at major services or as per manual. Spark Plug Gap: 0.03-0.04 inches (0.8-1.0 mm), consult manual for specific plug type. 📚 Vehicle History Brand Heritage Brand Heritage: BMW's long history of performance and motorsport heritage. Model Evolution Model Evolution: Developed as a homologation special for Group A touring car racing. Built on the standard E30 coupe chassis but extensively modified. Production Production Location: Munich, Germany Production Volume: Approximately 16,000 units worldwide. Special Editions Special Editions: Evolution I & II, Sport Evolution (Evo III), Cecotto, Ravaglia. 🏆 Awards & Recognition Recognitions Recognitions: Consistently ranked as one...