🏷️ Basic Information Identification Make: BMW Model: 3 Series Model Variant: 320i, 325i Model Generation Code: E30 Codes Chassis Codes: E30 Engine Codes 320I: M20B20 Engine Codes 325I: M20B25 👋 Introduction Market Position Segment: Compact Executive Sedan/Coupe Positioning: Renowned for sporty handling, solid build quality, and driver engagement. Competitive Analysis Competitors: Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75 Key Features Driving Dynamics: Excellent chassis balance, responsive steering, and robust suspension. Engine Options: Smooth inline-six engines known for their durability and performance characteristics. Build Quality: Typical BMW build quality, offering longevity and a premium feel. 📋 Manual Details Coverage Areas Years Covered: 1987, 1988, 1989, 1990, 1991 Models Covered: 320i, 325i (Coupe, Sedan, Convertible, Touring) Page Count Estimated Page Count: 600+ Manual Type Type: Service and Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine, Fuel System, Ignition System, Exhaust System, Transmission, Drivetrain Chassis: Suspension (Front & Rear), Steering, Brakes (Front & Rear), Wheels & Tires Electrical: Wiring Diagrams, Lighting, Instrumentation, Battery, Charging System, Starting System, Accessories Body: Body Panels, Doors, Windows, Seats, Interior Trim, HVAC System Procedures Included Maintenance: Oil Change, Filter Replacement, Spark Plug Replacement, Fluid Checks & Changes, Belt Adjustments Diagnostics: Troubleshooting Guides, Fault Code Interpretation, Symptom-Based Diagnostics Repair: Engine Rebuild, Transmission Overhaul, Brake Component Replacement, Suspension Bushing Replacement, Electrical Component Repair Assembly Disassembly: Detailed step-by-step instructions for major component removal and installation Technical Depth Depth: Comprehensive: Covers routine maintenance to complete engine and transmission rebuilds. Detail Level: Includes torque specifications, clearances, timing procedures, and diagnostic flowcharts. 📊 Manual Specifications File Format File Type: Searchable PDF Print Quality: High-resolution scans of original factory documentation, suitable for printing. Print Quality Image Clarity: Clear and legible diagrams, illustrations, and text. Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine 320I Engine Code: M20B20 Configuration: 2.0L Inline 6-cylinder Valvetrain: SOHC, 12 Valves Bore X Stroke: 80.0 mm x 66.0 mm Compression Ratio: 8.8:1 Horsepower: 129 hp @ 6000 rpm Torque: 174 Nm (128 lb-ft) @ 4300 rpm Fuel System: Bosch LE2-Jetronic Fuel Injection Primary Engine 325I Engine Code: M20B25 Configuration: 2.5L Inline 6-cylinder Valvetrain: SOHC, 12 Valves Bore X Stroke: 84.0 mm x 75.0 mm Compression Ratio: 8.8:1 Horsepower: 171 hp @ 5800 rpm Torque: 225 Nm (166 lb-ft) @ 4300 rpm Fuel System: Bosch Motronic ML-1.3 Fuel Injection 🔧 Transmission Standard Type 320I 325I: 5-Speed Manual (Getrag 260/5) Optional Type 320I 325I: 4-Speed Automatic (ZF 4HP22) Features Drivetrain: Rear-Wheel Drive (RWD) Limited Slip Differential: Optional on 325i models 📐 Dimensions Exterior Coupe Length: 4343 mm (171.0 in) Width: 1675 mm (65.9 in) Height: 1375 mm (54.1 in) Wheelbase: 2565 mm (100.9 in) Exterior Sedan Length: 4325 mm (170.3 in) Height: 1380 mm (54.3 in) Weights Curb Weight 320I Manual: ~1280 kg (~2822 lbs) Curb Weight 325I Manual: ~1290 kg (~2844 lbs) Cargo Trunk Volume: ~445 liters (~15.7 cu ft) 🛡️ Safety Features Ratings Us NHTSA Fivestar Rollover: N/A (No specific rating available for this era) Active Features ABS: Optional on most models, standard on later revisions Passive Features Airbags: Driver's airbag optional/standard depending on market and year Seatbelts: 3-point front and rear seatbelts Crumple Zones: Designed with front and rear crumple zones for impact absorption 💡 Technology Features Infotainment Radio: Factory-installed AM/FM cassette radios, often with limited features by modern standards. Speaker System: Basic speaker configurations, typically 2-4 speakers. Driver Assistance Cruise Control: Optional feature on many models. Connectivity Auxiliary Input: Not available from factory. 🔧 Maintenance Service Intervals Oil Oil Change Interval: Every 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, depending on driving conditions. Oil Type 320I 325I: API SF/SG, SAE 15W-40 or 20W-50 recommended. Synthetic 5W-40 or 10W-40 also suitable. Oil Capacity 320I: 4.5 Liters (4.8 US Quarts) with filter change Oil Capacity 325I: 4.5 Liters (4.8 US Quarts) with filter change Service Intervals Filters Air Filter Part Number Example: e.g., Mann-Filter C 2517 Oil Filter Part Number Example: e.g., Mann-Filter W917, Mahle OC 71 Service Intervals Maintenance Spark Plug Replacement Interval: Every 30,000 miles (48,000 km) Coolant Type: Ethylene Glycol based antifreeze, typically blue or green Known Issues Common Problem Cooling System: Plastic coolant expansion tank can become brittle and crack; metal radiator may develop leaks. Common Problem Fuel System: Fuel pump relay failure; injector seals can degrade. Common Problem Suspension: Worn control arm bushings, trailing arm bushings, and sway bar links are common, affecting handling. Common Problem Electrical: Corrosion in electrical connectors, failure of odometer/tachometer gear, fuel level sender unit issues. Common Problem Rust: Prone to rust in common areas like wheel arches, rocker panels, battery tray, and rear shock towers. 📚 Vehicle History Brand Heritage Bmw Legacy: BMW, Bayerische Motoren Werke AG, known for performance and luxury automobiles since its founding in 1916. Model Evolution E30 Introduction: Introduced in 1982...