🏷️ Basic Information Identification Make: BMW Model: 3 Series Sub Model: 325 Model Years Covered: 1984, 1985, 1986, 1987, 1988, 1989, 1990 Codes Chassis Code: E30 Engine Code Identifier: M20B25 👋 Introduction Market Position Segment: Compact Executive / Sports Sedan Target Audience: Enthusiasts, DIY mechanics, professional automotive repair shops Competitive Analysis Competitors Era: Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, Volvo 240 Key Features Driving Dynamics: Renowned for its balanced chassis, rear-wheel drive dynamics, and engaging driving experience Build Quality: Typical BMW build quality, known for durability and longevity Engine Reputation: M20 inline-six engine celebrated for its smoothness and linear power delivery 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual Language: English Format: PDF (Instant Download) Primary Coverage: Comprehensive repair, service, and maintenance procedures Page Count Page Count: 550 pages 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, rebuilding, cylinder head, pistons, crankshaft, camshafts, timing Engine Management: Fuel injection system (Bosch Motronic), ignition system, sensors, actuators, ECU diagnostics Transmission Manual: Manual gearbox overhaul, clutch replacement, driveshafts Transmission Automatic: Automatic gearbox service and repair (if applicable to 325 models covered) Drivetrain: Rear axle, differential, wheel bearings Suspension: Front and rear suspension components, shock absorbers, springs, bushings, alignment specifications Steering: Steering rack, power steering system, steering column, wheel alignment Brakes: Front and rear brake systems (disc brakes), hydraulic system, ABS (if equipped), parking brake Electrical System: Wiring diagrams, battery, alternator, starter motor, lighting, fuses, relays, dashboard instruments Bodywork And Chassis: Body panel removal and installation, chassis components, rust repair, interior trim HVAC: Heating, ventilation, and air conditioning system service Fuel System: Fuel tank, fuel pump, fuel lines, fuel filter Cooling System: Radiator, thermostat, water pump, coolant hoses, fan Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks, spark plug replacement, belt adjustments Troubleshooting: Diagnostic procedures, fault finding for engine, electrical, and mechanical systems Major Repairs: Engine overhaul, transmission rebuild, suspension component replacement, brake system overhauls Component Replacement: Detailed instructions for replacing specific parts and components across all systems Diagnostics: OBD-I (On-Board Diagnostics) procedures and interpretation of diagnostic trouble codes (DTCs) Torque Specifications: Precise torque values for all critical fasteners Wiring Diagrams: Complete and detailed electrical system wiring schematics Technical Depth Depth Of Information: Detailed explanations, diagrams, and step-by-step instructions for both amateur and professional mechanics Diagnostic Troubleshooting: In-depth diagnostic flowcharts and troubleshooting guides for common and uncommon issues Rebuilding Procedures: Comprehensive instructions for rebuilding major components like engines and transmissions 📊 Manual Specifications File Format File Type: PDF Searchable Text: Yes (typically included in quality PDFs) Print Quality Resolution: High-resolution for clear diagrams and text Binding Type Binding: Not applicable (PDF format) Paper Type Paper Type: Not applicable (PDF format) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-cylinder, Naturally Aspirated Engine Code: M20B25 Displacement: 2494 cc (2.5 Liters) Bore X Stroke: 84.0 mm x 75.0 mm Compression Ratio: 8.8:1 or 9.7:1 (depending on market/specific version) Performance Horsepower: Approximately 170 hp (127 kW) at 5800 rpm Torque: Approximately 170 lb-ft (230 Nm) at 4300 rpm Fuel System Fuel Delivery: Bosch Motronic fuel injection (sequential or multi-point) Fuel Type: Unleaded gasoline Fuel Octane Rating: Premium unleaded (91+ RON or 87+ AKI) 🔧 Transmission Standard Transmission Type: Getrag 260 5-speed manual transmission Optional Transmission Type: ZF 4HP22 4-speed automatic transmission Features Clutch: Hydraulically actuated single dry plate clutch Differential: Limited-slip differential (LSD) often optional or standard on sportier trims 📐 Dimensions Exterior Length: Approx. 4345 mm (171.1 in) Width: Approx. 1678 mm (66.1 in) Height: Approx. 1380 mm (54.3 in) Wheelbase: Approx. 2565 mm (101.0 in) Weights Curb Weight: Approx. 1270-1350 kg (2800-3000 lbs) Gross Vehicle Weight Rating: Varies by specific model and configuration Towing Capacity: Not typically specified or recommended for this model range 🛡️ Safety Features Ratings NHTSA Rating Era: NHTSA ratings from this era are less comprehensive than modern standards Active Features ABS: Anti-lock Braking System (ABS) available as an option or standard on later models Traction Control: Traction Control System (ASC) was not commonly available on E30 models Passive Features Airbags: Driver's side airbag became available as an option in later model years (post-1987) Seatbelts: Three-point inertia-reel seatbelts (front and rear) 💡 Technology Features Infotainment Head Unit: Original factory radio/cassette player, often with options for upgraded aftermarket units Speakers: Typically 4-6 speaker system Driver Assistance Cruise Control: Available as an option Connectivity Original Connectivity: None by modern standards; analog systems 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, whichever comes first Spark Plug Replacement: Typically every 30,000 miles (48,000 km) Coolant Flush: Every 2 years or 30,000 miles (48,000 km) Transmission Fluid Change Manual: Check manual; generally considered 'lifetime' but recommended every 60,000 miles (100,000 km) Transmission Fluid Change Automatic: Recommended every 30,000-50,000 miles (48,000-80,000 km) Fluid Specifications Engine Oil Type: SAE 15W-40 or 10W-40 API SG...