🏷️ Basic Information Identification Make: BMW Model: 3 Series Chassis Code: E30 Covered Years: 1984-1991 (specifically listing 1984, 1985, 1986, 1987, 1989, 1990 as per product description) Codes Engine Codes: M10 (e.g., M10B18), M20 (e.g., M20B25, M20B27) 👋 Introduction Market Position Vehicle Segment: Compact Executive Sports Sedan/Coupe/Convertible Competitive Analysis Key Competitors: Mercedes-Benz W201 (190E), Audi 80/90, Alfa Romeo 75, Ford Sierra, Peugeot 405 Key Features Driving Dynamics: Renowned for excellent handling, rear-wheel drive dynamics, driver-focused cockpit, balanced chassis Engineering Philosophy: BMW's signature 'ultimate driving machine' ethos, robust German engineering 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive workshop repair and maintenance Page Count Estimated Page Count: Varies by specific publication, but typically 1000+ pages for comprehensive E30 manuals. Manual Type Manual Classification: Workshop Manual / Service Manual / Repair Manual Language Language: English Format Digital Format: PDF Compatibility Operating Systems: Windows / macOS 📖 Manual Coverage Systems Covered Mechanical Systems: Engine, Fuel System (Fuel Injection), Lubrication System, Cooling System, Exhaust System, Transmission (Automatic & Manual), Drivetrain, Steering System, Suspension System, Brake System, Clutch System Electrical Systems: Ignition System, Charging System, Starting System, Lighting System, Instrumentation, Wiper/Washer System, Airbag System (though often limited on early E30s, check manual specifics), ABS (Anti-lock Braking System) Body And Interior: Body Panels, Doors, Windows, Seats, Interior Trim, HVAC (Heating & Air Conditioning) Procedures Included Maintenance Procedures: Routine maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspections and replacement, brake pad/rotor service Repair Procedures: Engine overhaul (including cylinder head removal, valvetrain service, camshaft timing), transmission overhaul, differential service, suspension component replacement, brake caliper rebuild, radiator and cooling system repair, fuel system component replacement, exhaust system repair, starter and alternator replacement, HVAC system diagnosis and repair Troubleshooting And Diagnostics: Diagnostic procedures for engine performance, electrical faults, fuel system issues, transmission problems; fault code interpretation (where applicable) Technical Depth Diagnostic Capabilities: Advanced diagnostics, wiring diagrams, component testing procedures, specifications for measurements and tolerances Rebuild Information: Detailed procedures for engine and transmission rebuilds, including torque specifications, assembly sequences, and critical tolerances Wiring Diagrams: Complete electrical wiring diagrams for all major systems 📊 Manual Specifications File Format File Type: PDF Print Quality Image Resolution: High resolution, suitable for on-screen viewing and printing of diagrams and text Binding Type Binding Format: Digital (PDF) Paper Type Paper Quality: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Variants Covered: 318i (M10B18, 1.8L I4), 325e (M20B27, 2.7L I6 'Eta'), 325i/325is (M20B25, 2.5L I6) Performance 318I Power: Approx. 101-114 hp (depending on market and year) 325E Power: Approx. 121-124 hp (focused on torque) 325I Power: Approx. 168-171 hp 325Is Power: Approx. 168-171 hp (often with sport suspension and LSD) Fuel System Injection System: Bosch Motronic (various versions depending on engine and year) 🔧 Transmission Standard Standard Transmission Type: Getrag 260 5-speed manual (common on 325i/is) Optional Optional Transmission Type: ZF 4HP22 4-speed automatic Features Drivetrain: Rear-wheel drive (RWD) Differential: Open differential standard; Limited-slip differential (LSD) optional on some models (e.g., 325is) 📐 Dimensions Exterior Body Styles: 2-door sedan (E30), 4-door sedan (E30), Convertible (E30), Touring (E30 - less common in North America), M3 (E30 - specific models) Weights Curb Weight Range: Approx. 2600-3000 lbs (1180-1360 kg) depending on body style and engine 🛡️ Safety Features Ratings Crash Test Information: E30 models predate modern stringent crash testing standards. However, they were known for robust unibody construction for their era. Active Features Anti Lock Brakes: ABS was optional on most models and standard on some later/higher trims (e.g., 325is). Covered in manual. Passive Features Airbag System: Driver airbag became available in later production years (late 80s/early 90s). Covered in manual if equipped. Seat Belts: Standard 3-point front and rear seatbelts. 💡 Technology Features Infotainment Audio System: Factory-installed radios were basic AM/FM, often with cassette players. Aftermarket upgrades are common. Instrument Cluster: Clear, driver-oriented dashboard with tachometer, speedometer, fuel gauge, and temperature gauge. Check control panel for system warnings. Driver Assistance Cruise Control: Optional on many models. Connectivity Factory Connectivity: None (no Bluetooth, USB, or smartphone integration from factory). 🔧 Maintenance Service Intervals Oil Change Interval: Typically 5,000-7,500 miles (8,000-12,000 km) or annually, depending on driving conditions and oil type used. Manual will specify. Timing Belt Chain: M10 engines use a timing chain (low maintenance). M20 engines use a timing belt, typically requiring replacement every 30,000-50,000 miles (48,000-80,000 km). Critical to follow manual's recommendation. Fluid Specifications Engine Oil Type: Varies by engine and temperature. Typically 20W-50, 10W-40, or 15W-50. Manual will specify exact BMW approval and viscosity. Coolant Type: Ethylene glycol-based coolant. Manual will detail mixture ratio and specific BMW coolant specifications. Transmission Fluid Type Manual: Manual transmissions typically use SAE 75W-90 or 80W-90 gear oil. Manual will specify type and capacity. Transmission Fluid Type Auto: Automatic transmissions require specific ATF (Automatic Transmission Fluid), e.g., Dexron III or equivalent. Manual will specify....