🏷️ Basic Information Identification Make: BMW Model: M3 Generation: E30 Codes Chassis Code: E30 Engine Codes: S14 👋 Introduction Market Position Positioning: Iconic performance sedan, homologation special for motorsport, enthusiast-focused sports car. Competitive Analysis Competitors: Porsche 944, Ford Sierra RS Cosworth, Alfa Romeo GTV6, Mercedes-Benz 190E 2.3-16. Key Features Performance Focus: Track-tuned suspension, powerful naturally aspirated engine, lightweight chassis, driver-focused ergonomics. Motorsport Heritage: Developed for Group A touring car racing homologation, direct lineage to E30 M3 race cars. 📋 Manual Details Coverage Areas Model Years Covered: 1986, 1987, 1988, 1989, 1990, 1991, 1992 Page Count Total Pages: 1000 Manual Type Type: Workshop Service Manual / Repair Manual Language Language: English Format Format: Instant Download (Digital) 📖 Manual Coverage Systems Covered Powertrain: Engine (S14), Transmission (Getrag 265), Differential, Fuel System, Exhaust System Chassis: Suspension (Front & Rear), Steering, Brakes (Front & Rear), Wheels & Tires Electrical: Wiring Diagrams, Engine Management System (DME), Lighting, Instrumentation, Audio System Body: Body Panels, Doors, Windows, Seats, Interior Trim, Body Repair Procedures Included Maintenance: Scheduled Maintenance, Oil Changes, Filter Replacements, Spark Plug Replacement, Fluid Checks Diagnostics: Troubleshooting Guides, Fault Code Diagnosis, Component Testing Repair: Engine Overhaul, Transmission Rebuild, Brake System Repair, Suspension Component Replacement, Electrical Component Repair Technical Data: Specifications, Tolerances, Torque Values, Component Identifications Technical Depth Depth: Comprehensive (from basic maintenance to full engine rebuilds and complex electrical diagnostics) 📊 Manual Specifications File Format Digital Format: Likely PDF (searchable text, printable pages) Print Quality Quality: High-resolution scans of original factory documentation Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Name: BMW S14 Engine Type: Naturally Aspirated Inline-4 Displacement: 2.3 Liters (2302 cc) Performance Horsepower: 192 hp (DIN) / 200 hp (US Spec) Torque: 230 Nm (170 lb-ft) DIN / 235 Nm (173 lb-ft) US Spec Redline: 7250 RPM Fuel System Fuel Delivery: Bosch Motronic Fuel Injection (DME) Fuel Type: Unleaded Premium Gasoline (91+ RON / 87+ Octane) 🔧 Transmission Standard Transmission Type: 5-Speed Manual Gearbox Model: Getrag 265/5 Optional Optional Transmission: None (Manual Only) Features Clutch Type: Hydraulically Actuated Single Dry Plate Differential: Limited Slip Differential (LSD) standard 📐 Dimensions Exterior Length: 4330 mm (170.5 in) Width: 1680 mm (66.1 in) Height: 1370 mm (53.9 in) Wheelbase: 2565 mm (101.0 in) Weights Curb Weight: Approx. 1200 kg (2645 lbs) Gross Vehicle Weight: Approx. 1630 kg (3593 lbs) 🛡️ Safety Features Ratings Crash Test Data: Limited official crash test data from this era, but built to robust BMW standards of the time. Active Features Braking System: Anti-lock Braking System (ABS) standard Steering: Power-assisted rack and pinion steering Passive Features Seatbelts: Three-point inertia reel seatbelts (front), lap belts (rear) Body Construction: Reinforced safety cage, crumple zones. 💡 Technology Features Infotainment Audio System: Factory BMW AM/FM Cassette Player (likely optional upgrade available). Driver Assistance ABS: Anti-lock Braking System (ABS) standard on all models. Connectivity External Ports: N/A (Analog era, no USB/Bluetooth) 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500 - 10,000 miles (12,000 - 15,000 km) or annually, depending on driving conditions. Major Service: Refer to manual for specific intervals for timing belt (if applicable to this engine variant), spark plugs, and other critical components. Fluid Specifications Engine Oil: BMW recommends Castrol SYNTEC (or equivalent) SAE 15W-50 or 20W-50 synthetic oil. Check manual for precise specifications. Coolant: BMW Blue Antifreeze/Coolant (G48) or equivalent ethylene glycol-based coolant with corrosion inhibitors. Brake Fluid: DOT 4 Brake Fluid Transmission Fluid: BMW Manual Transmission Fluid (MTF) LT-2 or equivalent API GL-4/GL-5 gear oil (check manual for specific viscosity and type). Known Issues Engine Wear: Camshaft wear, valve seal leaks, oil consumption due to age. S14 engine requires meticulous maintenance. Cooling System: Radiator leaks, failing water pump, thermostat issues are common due to age. Electrical: Fuse box issues, aging wiring harnesses, sensor failures can occur. Suspension: Worn control arm bushings, shock absorbers, and ball joints are typical wear items. 📚 Vehicle History Brand Heritage Brand Focus: BMW's legacy of building driver-focused, high-performance vehicles. Model Evolution E30 Development: First dedicated M model based on the E30 platform, designed for homologation in motorsport, particularly DTM. E30 M3 Distinction: Features unique body panels (fender flares, rear spoiler, C-pillar) compared to standard E30 models for aerodynamic and tire clearance improvements. Production Production Period: 1986-1991 Production Volume: Approximately 18,000 units worldwide across all body styles (Coupe, Convertible, Evolution models). 🏆 Awards & Recognition Recognitions Motorsport Success: Dominant in touring car racing (DTM, WTCC, ETCC) during its era, cementing its legendary status. Collector Status: Widely considered a modern classic and one of the most desirable BMW M cars ever produced. Ratings Performance Reviews: Consistently praised by automotive journalists for its handling, engine response, and driver engagement.