🏷️ Basic Information Identification Make: BMW Model: M3 Generation: E30 Model Year: 1991 Codes Chassis Code: E30 Engine Code: S14 👋 Introduction Market Position Segment: Compact executive sports coupe/sedan homologation special Target Audience: Enthusiasts, owners seeking to maintain and repair their E30 M3 Competitive Analysis Key Rivals: Porsche 911 (964), Mercedes-Benz 190E 2.3-16/2.5-16 Cosworth, Ford Sierra RS Cosworth Key Features Heritage: Motorsport homologation special derived from touring car racing Distinctive Styling: Box flares, revised bumpers, rear spoiler, unique C-pillar and rear window angle Performance Focus: High-revving S14 engine, revised suspension, stronger chassis components 📋 Manual Details Coverage Areas Primary Focus: Complete factory service and repair Engine Coverage: S14 engine, including fuel injection, ignition, exhaust, and cooling systems Drivetrain Coverage: Getrag 265 5-speed manual transmission, clutch, driveshaft, differential, axles Suspension Coverage: Front strut assembly, rear multi-link suspension, bushings, bearings Braking System Coverage: Front and rear disc brakes, ABS (if equipped), brake lines, calipers, master cylinder Electrical System Coverage: Wiring diagrams, ECU, sensors, lighting, starter, alternator, battery Body And Chassis Coverage: Body panels, doors, windows, seats, interior trim, chassis components Heating And Air Conditioning Coverage: HVAC system components, refrigerant, operation Troubleshooting Coverage: Diagnostic procedures and fault finding for all systems Page Count Approximate Pages: Hundreds (exact number not specified, but typical for comprehensive factory manuals) Manual Type Type: Factory Service Repair Manual Language Language: English (typical for factory manuals sold in primary markets) Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine, fuel, ignition, exhaust, cooling, transmission, drivetrain Chassis: Suspension, steering, brakes, wheels, tires Electrical: Battery, charging, starting, lighting, instrumentation, ECU, sensors, wiring harnesses Body: Exterior body panels, doors, windows, bumpers, aerodynamics, interior trim, seats Comfort And Climate: HVAC system, climate control Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks, spark plugs, brake pad replacement Diagnostic Procedures: Troubleshooting guides, symptom-based diagnostics, error code interpretation Repair Procedures: Engine overhaul, transmission overhaul, suspension component replacement, brake caliper rebuild, electrical component repair Component Removal And Installation: Detailed steps for removing and installing all major components Specifications And Tolerances: Torque values, clearances, alignment specifications, electrical resistance values Technical Depth Depth Of Information: Comprehensive, covering all aspects from basic maintenance to complete engine rebuilds and complex electrical diagnostics Diagnostic Capabilities: Advanced diagnostic procedures for fuel injection, ignition, and ABS systems Electrical Diagrams: Detailed, system-specific wiring diagrams with component locations Rebuild Information: Detailed instructions and specifications for rebuilding major mechanical components like the engine and transmission 📊 Manual Specifications File Format Type: PDF Searchability: Searchable text (expected for professionally converted factory manuals) Print Quality Resolution: High-resolution scans ensuring clarity of diagrams and text Printability: Printable in its entirety or select pages Binding Type Type: N/A (Digital Download) Paper Type Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Inline-4 (S14B23) Displacement: 2302 cc (2.3 Liters) Bore X Stroke: 91 mm x 87 mm Compression Ratio: 9.5:1 (Euro/US models) Valve Train: DOHC, 4 valves per cylinder Engine Management: Bosch Motronic (various versions) Performance Horsepower: 218 hp @ 6750 rpm (Euro Spec, Catalytic Converter) Torque: 230 Nm (170 lb-ft) @ 4750 rpm (Euro Spec) Redline: 7250 rpm Fuel System Injection Type: Bosch L-Jetronic or Motronic Fuel Injection Fuel Grade: Premium Unleaded (91 Octane or higher recommended) Engine Coolant Coolant Type: BMW Blue Antifreeze/Coolant (G48 or equivalent, ethylene glycol based) Engine Oil Oil Grade Recommendation: 10W-40 or 15W-50 (Synthetic Recommended for performance driving) Oil Capacity: 5.5 Liters (5.8 Quarts) with filter 🔧 Transmission Standard Type: Getrag 265 5-Speed Manual Gear Ratios: 1st: 3.72, 2nd: 2.41, 3rd: 1.70, 4th: 1.24, 5th: 1.00, Reverse: 3.16 Optional Type: N/A (M3 E30 was exclusively manual) Features Clutch Type: Hydraulic, single dry plate Transmission Fluid Fluid Type: GL-4 Gear Oil (SAE 75W-90 or 75W-80W) Fluid Capacity: 1.5 Liters (1.6 Quarts) 📐 Dimensions Exterior Length: 4345 mm (171.1 in) Width: 1700 mm (66.9 in) Height: 1370 mm (53.9 in) Wheelbase: 2565 mm (100.9 in) Front Track: 1408 mm (55.4 in) Rear Track: 1436 mm (56.5 in) Weights Curb Weight: 1200 - 1270 kg (2646 - 2800 lbs), depending on market and equipment Gross Vehicle Weight Rating: Approx. 1700 kg (3748 lbs) Wheels And Tires Wheel Size: 15 x 7.0J (standard), 15 x 7.5J (optional EVO wheels) Bolt Pattern: 5 x 120 mm Tire Size: 205/50 VR 15 (standard), 225/50 VR 15 (optional EVO) 🛡️ Safety Features Ratings Crash Test Results: Not extensively tested by modern standards; E30 platform generally considered robust for its era. Active Features ABS: Optional on some models, standard on later 1991 models Braking System: 4-wheel disc brakes with vented front rotors Passive Features Seatbelts: 3-point front, 2-point rear Body Structure: Reinforced passenger cell, crumple zones Headrests: Front and rear headrests 💡 Technology Features Infotainment Audio System: Factory radio/cassette player (various brands like Blaupunkt, Becker) with optional amplifier and speaker upgrades Instrumentation: Analog gauges including speedometer,...