🏷️ Basic Information Identification Make: BMW Model: 325i Model Variant: 325 Year: 1991 Codes Chassis Code: E30 👋 Introduction Market Position Market Segment: Compact Executive Sedan/Coupe Target Audience: Enthusiasts, DIY mechanics, independent repair shops seeking authentic BMW repair data. Competitive Analysis Key Competitors: Mercedes-Benz 190E, Audi 90, Acura Legend, Lexus ES250 Key Features Vehicle Reputation: Known for sporty handling, robust build quality, and driver engagement. Manual Value Proposition: Provides authorized factory procedures, diagrams, and specifications for accurate and efficient maintenance and repair. 📋 Manual Details Coverage Areas Engine Coverage: M20B25 inline-six engine Transmission Coverage: Getrag 260 5-speed manual, ZF 4HP22 4-speed automatic Drivetrain Coverage: Rear-wheel drive (RWD) Chassis Coverage: Suspension, steering, brakes, body structure Electrical Coverage: Wiring diagrams, component testing, diagnostic procedures Body Coverage: Body panels, interior trim, glass, seals Specific Systems: Fuel injection (Bosch Motronic 1.3), ignition, cooling, HVAC, emissions control Page Count Estimated Page Count: Hundreds of pages (exact number varies by source, but typically 1000+ for factory manuals) Manual Type Manual Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Engine overhaul, disassembly, assembly, internal components, timing belt, seals, gaskets Fuel System: Fuel pump, injectors, fuel pressure regulator, fuel filter replacement Ignition System: Spark plugs, ignition coils, distributor, ECU control Cooling System: Radiator, water pump, thermostat, hoses, coolant specifications Exhaust System: Catalytic converter, mufflers, pipes, O2 sensors Transmission Mechanical: Clutch replacement, gearbox overhaul, internal components (manual), torque converter, valve body (automatic) Drivetrain Components: Driveshaft, CV joints, differential, rear axle assembly Suspension System: Struts, shocks, control arms, ball joints, bushings, springs, alignment specifications Steering System: Power steering pump, steering rack, tie rods, steering column Brake System: Brake pads, rotors, calipers, master cylinder, brake fluid specifications, bleeding procedures, ABS diagnostics Electrical System Diagnostics: Troubleshooting circuits, component testing, voltage/resistance checks Lighting System: Headlights, taillights, interior lighting, bulb types Instrument Cluster: Gauges, warning lights, odometer repair HVAC System: Air conditioning compressor, heater core, blower motor, refrigerant types, climate control unit Emissions Control: Catalytic converter, EGR valve, charcoal canister, evaporative emissions system Safety Systems: Seat belt mechanisms, airbag system (if applicable for the year/model, though limited on early E30s) Procedures Included Routine Maintenance: Oil change, filter replacement, coolant flush, brake fluid flush, spark plug replacement, belt inspection/replacement Diagnostic Procedures: Troubleshooting common symptoms, fault code interpretation (where applicable), component testing Repair Procedures: Step-by-step instructions for component removal, installation, and adjustment Rebuild Procedures: Detailed instructions for engine and transmission overhauls Alignment Specifications: Front and rear wheel alignment angles, torque specifications for suspension components Wiring Diagrams: Comprehensive electrical schematics for all vehicle systems Torque Specifications: Precise torque values for critical fasteners across all systems Technical Depth Depth Level: Comprehensive Factory-Level Detail Diagnostic Capability: Advanced diagnostics for engine management, ABS, and other electronic systems (using specific BMW diagnostic tools of the era). Rebuild Capability: Full rebuild procedures for engine, transmission, differential, and major mechanical assemblies. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: High-resolution, searchable text and clear diagrams for printing. Binding Type Binding Type: Digital Download (PDF) - allows for on-demand printing of specific pages or the entire manual. Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: M20B25 Engine Configuration: 2.5L SOHC Inline-six (6-cylinder) Bore X Stroke: 84 mm x 75 mm Compression Ratio: 8.5:1 Performance Horsepower: 168 hp @ 5800 rpm Torque: 164 lb-ft @ 4750 rpm Fuel System Fuel Delivery: Bosch Motronic 1.3 Fuel Injection (EFI) Fuel Type: Unleaded gasoline, 87 octane minimum (91 octane recommended for optimal performance) Timing Timing Belt Interval: Replace every 40,000 - 60,000 miles or 3-5 years (critical maintenance item). 🔧 Transmission Standard Standard Transmission: Getrag 260 5-speed Manual Transmission Optional Optional Transmission: ZF 4HP22 4-speed Automatic Transmission Features Manual Transmission Fluid: BMW MTF LT-2 or equivalent (check manual for specific cross-reference) Automatic Transmission Fluid: Dexron III/Mercon or equivalent (check manual for specific BMW specification) 📐 Dimensions Exterior Wheelbase: 101.2 inches (2570 mm) Length: 170.5 inches (4330 mm) Width: 66.1 inches (1680 mm) Height: 55.1 inches (1400 mm) Weights Curb Weight: Approx. 2,950 - 3,050 lbs (1340 - 1380 kg), depending on body style and options. Gross Vehicle Weight Rating: Varies by model, consult vehicle's VIN plate. 🛡️ Safety Features Ratings Crash Test Results: No comprehensive NHTSA/IIHS ratings available for this specific year/model from that era. Early E30s relied on robust chassis engineering and seat belts as primary safety features. Later models added some airbags. Active Features Anti Lock Brakes: Optional ABS (Anti-lock Braking System) was available on some 1991 models. Passive Features Seat Belts: 3-point retractable front seat belts, 2-point lap belts in rear (early models) or 3-point belts in rear (later E30 variants). Airbags: Driver's side airbag was an optional feature on later E30 models, including some 1991 variants, but not standard. 💡 Technology...