🏷️ Basic Information Identification Make: BMW Model: 3 Series Generation Chassis Code: E30 Model Years: 1984-1990 👋 Introduction Market Position Positioning: The BMW E30 3 Series was positioned as a compact executive sports sedan and coupe, renowned for its driving dynamics, build quality, and sporty heritage. It solidified BMW's reputation in this segment. Competitive Analysis Competitors: Competed against vehicles like the Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, and various American and Japanese luxury sedans of the era. Key Features Driving Dynamics: Rear-wheel drive, near-perfect weight distribution, independent suspension, communicative steering, and a driver-focused cockpit. Engine Options: Offered a range of acclaimed 4-cylinder (M10 based) and 6-cylinder (M20 based) engines, known for their smoothness and performance. Target Audience Audience: Enthusiasts, driving purists, and those seeking a reliable, sporty, and well-engineered German luxury vehicle. 📋 Manual Details Coverage Areas Applicable Models: 318i, 325, 325e, 325es, 325i, 325is, 325i Convertible Page Count Estimated Pages: Likely several hundred pages, based on typical comprehensive workshop manuals of this era and file size. Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: Digital (PDF inferred from file size) 📖 Manual Coverage Systems Covered Engine: Engine mechanical (M10, M20 variants), fuel injection systems (Bosch L-Jetronic, Motronic), ignition systems, cooling systems, lubrication systems. Transmission: Manual and automatic transmission overhaul, clutch service, driveshaft, differential. Chassis And Suspension: Front and rear suspension components, steering system, wheel bearings, shock absorbers, springs, bushings. Brakes: Brake system diagnostics, hydraulic components (master cylinder, calipers, wheel cylinders), brake pad/shoe replacement, rotor resurfacing, parking brake system. Electrical System: Wiring diagrams, component testing, alternator, starter motor, battery, lighting system, accessories, fuses and relays, dashboard instruments. Body And Interior: Body panel removal and installation, door mechanisms, window regulators, seat adjustments, interior trim, convertible top operation (if applicable). Procedures Included Maintenance: Scheduled maintenance tasks, fluid level checks and changes, filter replacements, belt adjustments, spark plug replacement, tune-up procedures. Repair: Detailed step-by-step repair procedures for all major systems, including component disassembly, inspection, repair, and reassembly. Troubleshooting: Diagnostic flowcharts, symptom-based troubleshooting guides for common issues, electrical diagnostic procedures. Technical Depth Depth: Comprehensive, suitable for professional technicians and advanced DIY enthusiasts. Covers everything from routine maintenance to complex engine and transmission overhauls. 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) File Size Mb: 156 Searchability: Likely text-searchable if OCR processed, allowing for quick information retrieval. Print Quality Printability: Printable, allowing for hard copy reference. Binding Type Binding: N/A (Digital format) Paper Type Paper Quality: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Code 318I: M10B18 (1.8L Inline-4) Engine Code 325: M20B25 (2.5L Inline-6) Engine Code 325E: M20B27 (2.7L Inline-6 'Eta') Performance Horsepower 318I: Approx. 100-105 hp Horsepower 325I: Approx. 168-170 hp Horsepower 325E: Approx. 121-127 hp (lower revving, economy-focused) Torque 325I: Approx. 164 lb-ft Fuel System Fuel Injection: Bosch L-Jetronic (318i), Bosch Motronic (325e, 325i) Fuel Type: Unleaded Gasoline 🔧 Transmission Standard Transmission Type 318I: 4-speed or 5-speed manual Transmission Type 325: 5-speed manual Optional Transmission Type Optional: 3-speed or 4-speed automatic (ZF) Features Clutch Type: Hydraulically actuated single dry plate clutch Differential Type: Open differential (limited slip optional on performance models) 📐 Dimensions Exterior Wheelbase Sedan: Approx. 2570 mm (101.2 in) Length Sedan: Approx. 4300 mm (169.3 in) Width: Approx. 1670-1700 mm (65.7-66.9 in) Weights Curb Weight Approx: 1200-1350 kg (2645-2976 lbs), depending on model and equipment Cargo Trunk Volume Approx: Approx. 425 liters (15.0 cu ft) 🛡️ Safety Features Ratings Crash Testing: While official NHTSA ratings for early E30s are limited, contemporary reviews praised its solid structure and occupant protection for its era. Later models may have improved structural rigidity. Active Features ABS: Optional on most models, standard on some later/performance variants. Passive Features Airbags: Driver airbag became optional in the late 1980s and standard on some models by 1990. Passenger airbags were not typically offered on the E30. Seatbelts: Three-point inertia-reel seatbelts front and rear. 💡 Technology Features Infotainment Radio Options: Factory cassette radio or AM/FM stereo systems. Aftermarket upgrades common. Speakers: Typically 4-6 speakers depending on trim level. Driver Assistance Cruise Control: Optional on many models. Connectivity Connectivity Features: Limited to basic radio and accessory power. No integrated Bluetooth or USB in factory systems. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500-10,000 miles or annually, depending on driving conditions. Check manual for specific intervals. Spark Plug Replacement: Every 30,000-60,000 miles, depending on plug type (copper, platinum). Timing Belt Replacement: For M20 engines: Every 30,000-50,000 miles. For M10 (some variants): Timing chain, generally requires less frequent attention but can stretch. Fluid Specifications Engine Oil Spec: API SG or higher, SAE 10W-40 or 20W-50 recommended. Consult manual for exact viscosity based on climate. Coolant Type: BMW Blue Antifreeze (or equivalent ethylene glycol-based coolant with corrosion inhibitors). Transmission Fluid Manual: GL-4 gear oil (e.g., SAE 75W-90 or 80W-90) Transmission Fluid Automatic:...