🏷️ Basic Information Identification Make: BMW Model: 3 Series Chassis Code: E30 Generation Generation Code: E30 Production Years: 1982-1994 (North America) Codes Engine Codes Covered: M10 (4-cylinder), M20 (6-cylinder) 👋 Introduction Market Position Market Position: The E30 3 Series was BMW's cornerstone compact executive car during the 1980s and early 1990s, renowned for its sporting prowess and driver engagement. It solidified BMW's reputation for building the 'ultimate driving machine'. Competitive Analysis Key Competitors: Mercedes-Benz W201 (190E), Audi 80/90, Alfa Romeo 75, Volvo 240. Key Features Driving Dynamics: Excellent balance, responsive steering, rear-wheel-drive bias, robust chassis. Engine Offerings: Efficient 4-cylinder engines and smooth, powerful inline-6 engines. Build Quality: Typically high for its era, reflecting BMW's commitment to engineering and materials. 📋 Manual Details Coverage Areas Coverage Models: 318i, 325, 325e, 325es, 325i, 325is, 325i Convertible Coverage Years: 1981-1994 (Primary focus on North American market models from 1982 onwards) Page Count Estimated Page Count: High (Equivalent to a substantial workshop manual, typically 1000+ pages in print form. File size suggests extensive content.) Manual Type Manual Type: Workshop Repair Service Manual (Factory Service Manual - FSM style) Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine overhaul, lubrication system, cooling system, fuel injection (Bosch L-Jetronic, Motronic), ignition system, exhaust system. Drivetrain: Manual transmission (Getrag 260), Automatic transmission (ZF 4HP22), clutch, driveshaft, differential. Chassis: Suspension (front strut, rear semi-trailing arm), steering system (rack and pinion), braking system (front discs, rear drums/discs). Electrical: Wiring diagrams, lighting, instrument cluster, ignition switch, starter, alternator, battery, basic diagnostics. Bodywork: Body panels, doors, windows, interior trim, heating and ventilation, air conditioning. Safety Systems: Airbag system (if equipped), ABS (Anti-lock Braking System) for applicable models. Procedures Included Maintenance: Oil change, filter replacement, coolant flush, spark plug replacement, belt inspection/replacement, brake pad/shoe replacement, general inspections. Troubleshooting: Diagnostic procedures for common drivability issues, electrical faults, and mechanical problems. Repair: Detailed step-by-step instructions for component removal, disassembly, repair, assembly, and installation. Engine Rebuild: Cylinder head removal and overhaul, camshaft timing, piston/ring inspection, crankshaft and bearing checks. Transmission Service: Fluid changes, clutch replacement, manual transmission overhaul (basic), automatic transmission servicing. Technical Depth Depth: Comprehensive. Covers routine maintenance to complete engine and transmission rebuilds, including electrical system diagnostics. 📊 Manual Specifications File Format File Format: PDF File Size: 500MB (Indicates high resolution, detailed graphics, and extensive content.) Print Quality Print Quality Recommendation: Printable for workshop use; PDF format allows for digital searching and printing of specific sections. Binding Type Binding Type: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine Variant 318I: M10B18: 1.8L Inline-4, Bosch L-Jetronic Fuel Injection. Engine Variant 325E: M20B27: 2.7L Inline-6 (Eta), Bosch L-Jetronic/Motronic Fuel Injection, emphasis on torque and efficiency. Engine Variant 325I 325Is: M20B25: 2.5L Inline-6, Bosch Motronic Fuel Injection, higher performance variant. Performance Horsepower 318I: Approx. 101-114 hp (depending on specific market and tuning). Horsepower 325E: Approx. 121-124 hp. Horsepower 325I 325Is: Approx. 168-171 hp. Torque 325I 325Is: Approx. 164-167 lb-ft. Fuel System Fuel Injection Systems: Bosch L-Jetronic and Motronic systems, requiring specific diagnostic tools and knowledge for troubleshooting. Maintenance Timing Belt Vs Chain: M10 and M20 engines utilize a timing chain (though the M20 has a chain for the camshaft and a belt for the water pump, check specifics per engine). 🔧 Transmission Standard Transmission Standard: 4-speed or 5-speed manual transmission (Getrag 260). Optional Transmission Optional: 3-speed or 4-speed automatic transmission (ZF 4HP22). Features Clutch Type: Single dry plate clutch, hydraulic actuation. Fluid Specifications Manual Transmission Fluid: API GL-4 or GL-5 gear oil, typically 75W-90 or 75W-80. Automatic Transmission Fluid: ATF Dexron III (or equivalent specification, check manual for precise BMW part number). 📐 Dimensions Exterior Body Styles: 2-door sedan, 4-door sedan, convertible, (rarely) touring wagon. Weights Curb Weight Range: Approx. 2600-3000 lbs (1180-1360 kg), varies by model and equipment. Gross Vehicle Weight Rating Gvwr: Not explicitly stated, but typically around 3700-4000 lbs. 🛡️ Safety Features Ratings Crash Test Data: Limited official NHTSA ratings for early models, but generally considered safe for its era. Later E30s saw improvements in safety features. Active Features ABS: Optional on many models, standard on some higher trims and later years. Traction Control: Rarely available on E30 models. Passive Features Airbags: Optional driver-side airbag available from around 1987-1988 onwards, standard on late models. Seatbelts: 3-point front and rear seatbelts. 💡 Technology Features Infotainment Original Infotainment: Basic analog radio, cassette player, manual climate control. Later models offered optional power windows, mirrors, and limited on-board computers. Driver Assistance Driver Assistance Features: ABS was the primary driver assistance technology. No electronic stability control (ESC) or advanced driver aids. Connectivity Connectivity Options: None in the modern sense; focused on mechanical and basic electrical systems. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000-7,500 miles (8,000-12,000 km) or 12 months, whichever comes first....