🏷️ Basic Information Identification Make: BMW Model: 320 / 320i Generation Generation Code: E21 Codes Chassis Codes: E21 👋 Introduction Market Position Market Segment: Compact Executive / Sports Sedan Competitive Analysis Key Competitors: Mercedes-Benz W123, Audi 80/Fox, Alfa Romeo Alfetta, Volvo 240 Series Key Features Vehicle Characteristics: Rear-wheel drive, sporting dynamics, refined engineering, practical yet luxurious interior, German build quality. Manual Value Proposition Target Audience: DIY enthusiasts, professional mechanics, owners seeking to maintain and repair their classic BMW. 📋 Manual Details Coverage Areas Model Years Covered: 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984 Page Count Page Count: 910 Manual Type Manual Type: Workshop Service Manual / Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Yes Engine Management Fuel Injection: Yes Transmission Manual: Yes Transmission Automatic: Yes Drivetrain Rear Axle: Yes Suspension Front: Yes Suspension Rear: Yes Steering System: Yes Braking System Front: Yes Braking System Rear: Yes Fuel System: Yes Cooling System: Yes Ignition System: Yes Electrical System Starter Alternator: Yes Lighting System: Yes Instrumentation Gauges: Yes Body Exterior: Yes Body Interior: Yes HVAC System: Yes Diagnostic Procedures: Yes Procedures Included Routine Maintenance: Yes Troubleshooting: Yes Removal Installation: Yes Disassembly Assembly: Yes Adjustments: Yes Component Overhaul: Yes Tightening Torques: Yes Special Tool Usage: Yes Wiring Diagrams: Yes Schematics: Yes Technical Depth Depth Of Information: Comprehensive, bumper-to-bumper repair procedures, detailed explanations, and pictorial diagrams. 📊 Manual Specifications File Format File Format: PDF Print Quality Printability: Yes, all pages are printable. Binding Type Binding Type: Digital (PDF) Paper Type Paper Type: Not Applicable (Digital File) Software Requirements Required Software: Adobe Reader Compatibility Operating Systems: Windows, Mac, Linux OS ⚙️ Engine Specifications Primary Engine Engine Code 320I: M10 (4-cylinder, single overhead camshaft) Engine Displacement 320I: 1.8 Liters (1766 cc) Fuel System 320I: Bosch L-Jetronic Fuel Injection Horsepower 320I Early: Approx. 105-110 hp (depending on market and specific year) Torque 320I Early: Approx. 150-155 Nm (depending on market and specific year) Engine Variants Covered 320 (Carbureted): Yes (likely covered, check manual specifics for fuel delivery system details) Performance Engine Construction: Cast iron block, aluminum cylinder head. Fuel System Carburetor Variants: Likely Solex or Zenith carburetors for non-i models. 🔧 Transmission Standard Standard Transmission Type: 4-speed Manual Optional Optional Transmission Type: 3-speed Automatic (ZF) Features Clutch Type: Single dry plate, hydraulically actuated. 📐 Dimensions Exterior Wheelbase: Approx. 2570 mm (101.2 in) Length: Approx. 4375 mm (172.2 in) Width: Approx. 1610 mm (63.4 in) Height: Approx. 1380 mm (54.3 in) Weights Curb Weight: Approx. 1150-1250 kg (depending on equipment) Wheel Bolt Pattern: 4x100mm Wheel Size Standard: 13-inch (often steel wheels with hubcaps) 🛡️ Safety Features Ratings Safety Era Considerations: Reflects safety standards of the late 1970s and early 1980s; lacks modern active safety features. Passive Features Seatbelts: Standard front seatbelts, often lap and shoulder belts. Structural Integrity: Monocoque construction with crumple zones. 💡 Technology Features Infotainment Infotainment System: Basic AM/FM radio, optional cassette player. Analog gauges. Driver Assistance Driver Assistance Features: None; focused on driver engagement and mechanical feedback. Connectivity Connectivity Features: None. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000-7,500 miles or annually (refer to manual for exact BMW recommendations). Tune Up Interval: Spark plugs, filters, and basic checks at intervals like 15,000-30,000 miles. Fluid Specifications Engine Oil Type: Refer to manual for specific viscosity (e.g., 20W-50, 10W-40 depending on climate and oil technology of the era). Coolant Type: Ethylene glycol-based antifreeze mixed with distilled water (50/50). Transmission Fluid Manual: GL-4 gear oil (e.g., SAE 75W-90 or 80W-90). Transmission Fluid Automatic: Dexron II or equivalent automatic transmission fluid. Brake Fluid Type: DOT 3 or DOT 4. Known Issues Rust Prone Areas: Wheel arches, rocker panels, floor pans, strut towers, battery tray. Fuel System Issues: Aging fuel lines, leaky fuel pumps, clogged injectors (for L-Jetronic models), carburetor issues. Cooling System Wear: Radiator leaks, deteriorating hoses, failing water pumps. Electrical System Aging: Corroded connections, failing relays, worn wiring insulation. Suspension Wear: Worn control arm bushings, ball joints, tie rod ends, shock absorbers. Brake Component Wear: Worn brake pads and rotors, seizing calipers, aging brake lines. 📚 Vehicle History Brand Heritage Bmw History: BMW, known for performance and engineering, established itself as a premium automotive manufacturer with a focus on driving dynamics. Model Evolution E21 Launch Purpose: Introduced as BMW's entry-level model to compete in the growing compact executive segment. E21 Design Influence: Featured BMW's signature kidney grille and Hofmeister kink. Early models had a distinct front end design that evolved slightly over its production run. Production Production Years: 1975-1983 Manufacturing Locations: Germany 🏆 Awards & Recognition Recognitions Historical Acclaim: Generally well-regarded for its driving dynamics and build quality in its era, setting a benchmark for compact luxury sports sedans.