🏷️ Basic Information Identification Make: BMW Model: 320i Model Variant: 320 Codes Chassis Code Series: E21 Engine Code Series: M10 (early models), M20 (later models) 👋 Introduction Market Position Target Audience: BMW 320/320i owners with basic mechanical skills, independent auto service professionals, and informed car owners. Competitive Analysis Uniqueness: Vehicle-specific information, not generic. Contains the same data used by authorized dealer service departments. Key Features Content Quality: Accurate, clear, and concise text with illustrations. Cost Savings: Enables DIY repairs, leading to significant cost savings on maintenance and repairs. Preparedness: Provides resources for timely maintenance and repairs, preventing costly issues. 📋 Manual Details Coverage Areas Applicable Years: 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984 Global Coverage: Yes Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: PDF File Compatibility: Windows and Mac OS Print Capability: Yes (printable pages) Page Count Estimated Page Count: Comprehensive (specific count not provided, but described as complete) 📖 Manual Coverage Systems Covered Engine Mechanical: Yes Engine Electrical: Yes Emission Control: Yes Fuel System: Yes Clutch System: Yes Manual Transmission: Yes Automatic Transmission: Yes Driveshaft Axle: Yes Suspension: Yes Steering System: Yes Restraint System: Yes Brake System: Yes Body Interior Exterior: Yes Body Electrical: Yes HVAC: Yes General Information: Yes Procedures Included Maintenance: Yes (oil changes, filter replacements, tune-ups, etc.) Troubleshooting: Yes Repair: Yes (step-by-step instructions) Diagnostics: Yes Technical Depth Depth: Comprehensive (from basic maintenance to detailed repairs, equivalent to dealer technician level) Diagrams Illustrations: Yes Wiring Schematics: Yes Specifications: Yes (for repair and troubleshooting) 📊 Manual Specifications File Format File Type: PDF Reader Requirement: Adobe PDF Reader Print Quality Printability: High (individual pages can be printed) Binding Type Binding: Digital (not applicable for PDF) Paper Type Paper Quality: Not applicable for PDF format ⚙️ Engine Specifications Primary Engine Engine Family: M10 (e.g., 320i, 320) Displacement: 1.8L (1766 cc) for some early models, 2.0L (1990 cc) for later models (e.g., 320i). Cylinder Configuration: Inline 4-cylinder Performance Horsepower Early: Approximately 90-100 hp (varies by market and specific tuning) Horsepower Later: Approximately 105-115 hp (for 2.0L M20 engine variants) Fuel System Fuel Delivery: Carburetor (e.g., Solex, Zenith) for early models; Bosch L-Jetronic or K-Jetronic fuel injection for later 320i models. Fuel Type: Unleaded Gasoline (as mandated by emission regulations) 🔧 Transmission Standard Type: 4-speed manual (common) Optional Type: 3-speed automatic (e.g., ZF 3HP14 or 3HP22) Features Clutch Type: Single dry plate 📐 Dimensions Exterior Body Style: 2-door sedan Wheelbase: Approx. 2563 mm (100.9 inches) Length: Approx. 4225 mm (166.3 inches) Width: Approx. 1624 mm (63.9 inches) Height: Approx. 1380 mm (54.3 inches) Weights Curb Weight: Approx. 1100-1200 kg (2425-2645 lbs), depending on equipment 🛡️ Safety Features Ratings Crash Test Ratings: Not extensively tested by modern standards, but early BMWs were known for robust construction. Active Features Brakes: Front disc brakes, rear drum brakes. Some models may have optional front ventilated discs. Steering: Recirculating ball steering system (optional power steering). Passive Features Seatbelts: Standard front seatbelts, optional rear seatbelts. 💡 Technology Features Infotainment Audio System: Factory-installed radio (AM/FM), often with a cassette player in later models. Speaker count typically 2 or 4. Driver Assistance ABS: Anti-lock Braking System (ABS) was not standard and was a rare option on this model. Connectivity Bluetooth Usb: Not applicable to this era of vehicle. 🔧 Maintenance Service Intervals Oil Change: Recommended every 5,000-7,500 miles or 6-12 months, depending on driving conditions and oil type. Spark Plugs: Typically every 20,000-30,000 miles, depending on plug type. Air Filter: Inspect every oil change, replace every 15,000-25,000 miles or as needed. Fluid Specifications Engine Oil: API SF or SG rated, SAE 20W-50 or 10W-40 recommended (consult manual for specific viscosity by temperature). Coolant: BMW blue coolant or equivalent ethylene glycol-based antifreeze mixed 50/50 with distilled water. Brake Fluid: DOT 3 or DOT 4 glycol-based brake fluid. Transmission Fluid Manual: GL-4 gear oil (e.g., SAE 75W-90 or 80W-90). Transmission Fluid Automatic: Dexron II or equivalent ATF fluid. Known Issues Rust Corrosion: Common in wheel arches, sills, and rocker panels due to age and exposure. Cooling System: Radiator leaks, thermostat issues, and hose degradation are potential concerns. Fuel System Carbureted: Carburetor tuning and adjustment can be sensitive; vacuum leaks are common. Fuel System Injected: Fuel pump, injector, and airflow meter issues can occur with age on L-Jetronic systems. Electrical System: Aging wiring harnesses, faulty grounds, and intermittent electrical connections are typical. 📚 Vehicle History Brand Heritage Bmw Legacy: BMW is renowned for its focus on driving dynamics, sporty handling, and driver-centric engineering. Model Evolution E21 Introduction: The E21 chassis succeeded the popular 02 Series and was BMW's first dedicated compact executive sedan. E21 Significance: Introduced BMW's signature shark-nose styling and set the stage for the highly successful 3 Series lineage. Production Production Years: 1975-1983 Production Locations: Germany (primarily Munich) 🏆 Awards & Recognition Recognitions...