🏷️ Basic Information Identification Make: BMW Model: 325i Model Generation Code: E30 Model Generation Name: Second Generation E30 Codes Chassis Code: E30 Engine Code Identifier: M20B25 👋 Introduction Market Position Segment: Compact Executive Sports Sedan/Coupe Reputation: Renowned for its driving dynamics, build quality, and sporty character. Competitive Analysis Key Competitors: Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, Ford Sierra XR4i, Opel Monza/Senator Key Features Driving Dynamics: Excellent balance, rear-wheel drive, responsive steering, well-engineered suspension. Engine Smoothness: The M20 straight-six engine is known for its smooth operation and linear power delivery. Build Quality: Exceptional German engineering and high-quality materials for its era. Manual Purpose Utility: Essential tool for owners and independent mechanics to maintain and repair the E30 325i effectively. 📋 Manual Details Coverage Areas Covered Years: 1987, 1988, 1989, 1990, 1991 Covered Models: BMW 325i Specific Trim Levels: All 325i trims (e.g., base, sport, convertible, sedan, coupe) Page Count Estimated Page Count: Approximately 2000+ pages (typical for comprehensive factory-style manuals) Manual Type Type: Service and Repair Manual Source Type: Likely based on or derived from factory service information Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel system, ignition system, cooling system, exhaust system, engine management (DME), transmission (manual & automatic) Chassis: Suspension (front & rear), steering system, braking system (including ABS where applicable), wheels and tires Electrical: Complete electrical system, wiring diagrams, battery, alternator, starter, lighting, instrumentation, fuses, relays, engine control unit (ECU) diagnostics Body: Body construction, exterior panels, doors, windows, sunroof, interior trim, HVAC system Procedures Included Maintenance Procedures: Oil changes, filter replacements, spark plug replacement, fluid checks and top-offs, belt inspection/replacement, brake pad/rotor service, tune-ups Diagnostic Procedures: Troubleshooting guides, symptom-based diagnostics, electrical system testing, engine performance analysis Repair Procedures: Engine rebuilds, transmission overhauls, suspension component replacement, brake caliper service, electrical component repair, body panel repair Adjustment Procedures: Valve adjustments, idle speed adjustments, ignition timing adjustments (where applicable), clutch adjustment Special Tools Procedures: Identification and use of BMW-specific tools for various repair procedures Technical Depth Depth Level: Comprehensive: Covers everything from routine maintenance to complete engine and transmission rebuilds. Diagnostic Focus: Detailed diagnostic flowcharts and explanations for common issues. Torque Specifications: Includes precise torque values for critical fasteners across all systems. Wiring Diagrams: Complete and detailed electrical wiring schematics for all vehicle systems. 📊 Manual Specifications File Format File Type: PDF Searchability: Text-searchable (if properly OCR'd) Print Quality Quality: High resolution, suitable for printing individual pages or the entire manual. Binding Type Binding: Not applicable (digital format) Paper Type Paper: Not applicable (digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Inline 6-Cylinder Engine Code: M20B25 Displacement: 2494 cc (2.5 Liters) Bore X Stroke: 84 mm x 75 mm Compression Ratio: 8.8:1 Valvetrain: SOHC (Single Overhead Camshaft), 2 valves per cylinder Performance Horsepower: 168 hp @ 5800 rpm (approx.) Torque: 225 Nm (166 lb-ft) @ 4300 rpm (approx.) Fuel System Fuel Delivery: Bosch L-Jetronic (later models may have Motronic) Fuel Injection Fuel Type: Unleaded Premium Gasoline (91 Octane or higher recommended) Cooling System Coolant Type: BMW Blue Antifreeze/Coolant (or equivalent ethylene glycol-based with corrosion inhibitors) Lubrication System Oil Type: SAE 15W-40 or 20W-50 (check manual for specific conditions/approvals) Oil Capacity: Approx. 4.25 liters (4.5 US quarts) with filter 🔧 Transmission Standard Transmission Type: 5-speed Manual Transmission (Getrag 260/5) Optional Transmission Type: 4-speed Automatic Transmission (ZF 4HP22) Features Clutch Type: Hydraulically actuated single-plate dry clutch Manual Gear Ratios: Refer to manual for specific ratios (e.g., 3.72:1 first gear) Automatic Gear Ratios: Refer to manual for specific ratios (e.g., 2.48:1 first gear) Transmission Fluid Manual: GL-4 Gear Oil (e.g., 75W-90 synthetic or mineral) Transmission Fluid Automatic: Dexron III/Mercon ATF (or equivalent) 📐 Dimensions Exterior Length: Approx. 4340 mm (170.9 in) Width: Approx. 1670 mm (65.7 in) Height: Approx. 1380 mm (54.3 in) for Coupe/Sedan Wheelbase: Approx. 2570 mm (101.2 in) Track Width Front: Approx. 1406 mm (55.3 in) Track Width Rear: Approx. 1436 mm (56.5 in) Weights Curb Weight: Approx. 1320 kg (2910 lbs) for manual sedan Gross Vehicle Weight Rating: Refer to vehicle data plate Towing Capacity: Not typically specified for this model Cargo Trunk Volume: Approx. 450 liters (15.9 cu ft) for sedan 🛡️ Safety Features Ratings Crash Test Results: NHTSA and IIHS ratings from the era are available but may not be directly comparable to modern standards. The E30 chassis was considered robust for its time. Active Features ABS: Available on some models/trims (Anti-lock Braking System) Traction Control: Not commonly available on this generation Passive Features Airbags: Driver airbag standard from late 1989/1990 models onwards. Passenger airbag not typical. Seatbelts: 3-point front and rear seatbelts Rollover Protection: Reinforced A-pillars and B-pillars (especially on convertible models) 💡 Technology Features Infotainment Audio System: Factory cassette radio with optional CD changer integration (later models). Instrumentation: Analog gauges for speedometer, tachometer, fuel,...