🏷️ Basic Information Identification Make: BMW Model: 325 Trim: 325i Model Years Covered: 1984, 1985, 1986, 1987, 1988, 1989, 1990 Codes Chassis Code Series: E30 Engine Codes: M20B25 👋 Introduction Market Position Positioning: The BMW 325i (E30) was a highly regarded sports sedan and coupe, known for its driving dynamics and build quality, popular among enthusiasts and daily drivers alike. Competitive Analysis Competitors: Competed with vehicles like the Mercedes-Benz 190E, Audi 80/90 Quattro, and the Alfa Romeo Milano/75. Key Features Driving Dynamics: Renowned for its balanced chassis, rear-wheel-drive layout, and responsive handling. Engine Performance: Smooth and rev-happy M20 inline-six engine provided spirited performance. Build Quality: Typical BMW build quality for the era, offering durability and a premium feel. 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service and Repair Secondary Coverage: Maintenance, Troubleshooting, Diagnostics, Overhaul Page Count Total Pages: 554 Manual Type Type: Factory Authorized Service Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Full rebuild procedures, component specifications, timing belt, cylinder head, piston/ring installation, crankshaft, camshaft. Engine Management: Bosch Motronic fuel injection and ignition system diagnostics, sensor testing (TPS, MAF, O2), ECU troubleshooting, idle control. Transmission: Manual and automatic transmission service, clutch replacement, differential service, torque converter replacement. Brakes: Front and rear brake system overhaul, caliper service, rotor replacement, ABS system diagnostics (if equipped). Suspension Steering: Front struts, rear shock absorbers, control arms, ball joints, steering rack, power steering system. Electrical: Wiring diagrams for all systems, starter, alternator, battery, lighting, fuses, relays, instrument cluster diagnostics. Fuel System: Fuel pump, fuel injectors, fuel pressure regulator, fuel filter replacement, fuel tank service. Cooling System: Radiator, water pump, thermostat, coolant hoses, fan clutch replacement, flush and fill procedures. Exhaust System: Exhaust manifold, catalytic converter, muffler, exhaust pipe replacement. Body And Chassis: Body panel alignment, door lock mechanisms, window regulators, interior trim removal, rust repair guidance. Procedures Included Preventative Maintenance: Oil changes, filter replacements, spark plug replacement, coolant checks, brake fluid flushes. Troubleshooting: Detailed diagnostic flowcharts for common problems (no-start, poor performance, electrical faults). Repair And Rebuild: Step-by-step instructions for component removal, installation, and rebuilding of major systems. Diagnostics: Component testing procedures, resistance values, voltage checks, use of diagnostic tools. Torque Specifications: Comprehensive torque values for all critical fasteners. Alignment: Wheel alignment specifications and procedures. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to complete engine and transmission overhauls. 📊 Manual Specifications File Format File Type: PDF Print Quality Quality: High-resolution scans of original factory documentation, ensuring clarity of diagrams and text. Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) Searchability Searchable Text: Likely to be OCR'd, enabling text searching for specific terms and procedures. ⚙️ Engine Specifications Primary Engine Engine Code: M20B25 Engine Type: 2.5L SOHC Inline-6 Cylinder Bore X Stroke: 84 mm x 75 mm Compression Ratio: 8.5:1 Performance Horsepower: 168 hp @ 5800 rpm (approx.) Torque: 164 lb-ft @ 4300 rpm (approx.) Fuel System System: Bosch Motronic Electronic Fuel Injection (EFI) with Digital Engine Management Fuel Type: Unleaded Gasoline Timing Timing Belt Type: Rubber Timing Belt Timing Belt Replacement Interval: Recommended every 60,000 miles or 4-5 years (critical to prevent engine damage). 🔧 Transmission Standard Type: Getrag 260 5-speed Manual Transmission Optional Type: ZF 4HP22 4-speed Automatic Transmission Features Clutch: Hydraulically actuated single dry plate clutch. Fluid Specifications Manual Transmission Fluid: BMW recommends API GL-4 gear oil, e.g., Castrol TWS Syntran 75W-90 or equivalent. Automatic Transmission Fluid: BMW LT-3 or equivalent Dexron III (check manual for specific BMW numbering). 📐 Dimensions Exterior Length: Approx. 170.5 inches (4330 mm) Width: Approx. 65.7 inches (1670 mm) Height: Approx. 53.8 inches (1370 mm) Wheelbase Wheelbase: Approx. 101.2 inches (2570 mm) Weights Curb Weight: Approx. 2900 - 3100 lbs (1315 - 1406 kg), depending on body style and transmission. 🛡️ Safety Features Ratings Crash Test Results: No comprehensive government crash test data available for this era in modern format. However, E30 chassis was known for solid construction. Active Features ABS: Optional Anti-lock Braking System (ABS) available on later models or as an option. Passive Features Seatbelts: Three-point seatbelts with inertia reels. Rollover Protection: Reinforced A-pillars and roof structure. 💡 Technology Features Infotainment Audio System: Factory AM/FM stereo with cassette player, optional CD player. Basic analog controls. Display: Analog gauges for speedometer, tachometer, fuel level, and temperature. Warning lights for system status. Driver Assistance Cruise Control: Optional electronic cruise control. Connectivity Bluetooth: Not applicable for this model year. Aux Input: Not applicable for this model year. Aftermarket solutions available. 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 miles or 12 months, using synthetic oil. Spark Plug Replacement: Typically every 30,000 miles (refer to manual for specific plug type). Brake Fluid Flush: Every 24 months or as indicated by fluid condition. Coolant Flush: Every 2 years or 30,000 miles. Fluid Specifications Engine Oil: SAE...