🏷️ Basic Information Identification Make: BMW Model: 3 Series Chassis Code: E21 Engine Variants Covered: 320i, 320iA, 320i(1.8L), 320iA (1.8L) Model Years Covered: 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983 👋 Introduction Market Position Era: The BMW E21 represented BMW's entry into the compact executive sports sedan segment, challenging established models. Segment: Compact Executive / Sport Sedan Competitive Analysis Key Competitors: Mercedes-Benz W123, Audi 80/Fox, Alfa Romeo Alfetta, Ford Granada Key Features Design Philosophy: Iconic 'Bangle' design elements, driver-focused cockpit, BMW's renowned handling characteristics. Manual Value: Essential resource for owners and mechanics to maintain, diagnose, and repair the classic BMW E21, enabling DIY maintenance and preserving vehicle value. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual Page Count: 700 Language: English Format: PDF (Digital Download) Delivery Method: Instant Download 📖 Manual Coverage Systems Covered Engine: Complete Overhaul, Diagnosis, Tuning Engine Electrical: Ignition System, Starting System, Charging System, Sensor Diagnostics Fuel System: Fuel Pump, Injectors, Fuel Lines, Fuel Tank, Fuel Pressure Regulation Cooling System: Radiator, Fan, Water Pump, Thermostat, Hoses, Antifreeze Specifications Exhaust System: Catalytic Converter (if applicable), Muffler, Exhaust Pipes, Gaskets Clutch: Clutch Operation, Disc, Pressure Plate, Release Bearing, Hydraulic System Transmission: Manual and Automatic Transmission Overhaul, Gear Ratios, Fluid Specifications, Shifter Linkage Drivetrain: Drive Shaft, Universal Joints, Differential, Axles Front Axle: Suspension Components, Ball Joints, Bushings, Control Arms Steering: Steering Rack, Tie Rods, Power Steering System (if equipped), Wheel Alignment Specifications Rear Axle: Suspension Components, Shock Absorbers, Control Arms, Bushings Brakes: Disc Brakes (Front and Rear), Brake Calipers, Rotors, Pads, Master Cylinder, Brake Lines, Bleeding Procedures, Parking Brake Pedal Assembly: Brake Pedal, Accelerator Pedal, Clutch Pedal (Manual) Wheels And Tires: Tire Pressure Specifications, Wheel Bolt Patterns, Rim Sizes Body: Body Panel Repair, Rust Prevention, Door Mechanisms, Window Regulators, Bumpers Body Interior Equipment: Dashboard, Trim Panels, Door Panels, Center Console Seats: Seat Adjustment Mechanisms, Upholstery Repair Sliding Roof: Sunroof Mechanism, Seals, Operation Chassis Electrical: Wiring Diagrams, Fuses, Relays, Lighting Circuits, Horn Instruments: Speedometer, Tachometer, Fuel Gauge, Warning Lights, Instrument Cluster Repair Lights: Headlights, Taillights, Turn Signals, Interior Lights, Bulb Specifications HVAC: Heating System, Ventilation, Air Conditioning (if equipped), Blower Motor, Controls Radio And Accessories: Antenna, Speaker Installation, Electrical Accessory Circuits Equipment Parts And Accessories: Engine and Chassis Component Identification and Installation Procedures Included Preventative Maintenance: Scheduled Maintenance, Fluid Changes, Filter Replacements, Inspections Troubleshooting: Diagnostic Guides, Common Faults and Solutions, Electrical System Diagnosis Repair: Step-by-Step Repair Procedures for all Major Systems Rebuild: Detailed Engine and Transmission Rebuild Procedures Restoration: Guidance for restoring various components and systems Technical Depth Depth: Comprehensive (covers everything from basic maintenance to complete engine rebuilds) Detail Level: Illustrated with clear step-by-step instructions, including exploded views and diagrams Target Audience: Professional Technicians, Mechanics, and DIY Enthusiasts 📊 Manual Specifications File Format File Type: PDF Compatibility: Windows, Linux, Mac (requires PDF Reader) Searchability: Likely searchable text (typical for official PDF manuals) Printability: Printable without restrictions Zoomability: Zoomable illustrations Compression: May be zipped (requires WinZip or WinRAR for unzipping) File Size Indication: Up to 5GB (check specific listing for exact size) Print Quality Quality: High Resolution (as expected from an original factory manual) Binding Type Type: Not Applicable (Digital Download) Paper Type Type: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: M10 (variants for 320i) Engine Type: Inline-4 Cylinder, SOHC (Single Overhead Camshaft) Displacement: 1.8 Liters (approx. 1766cc) Performance Horsepower Range: Approximately 100-115 hp (depending on specific market and tune) Torque Range: Approximately 100-115 lb-ft (depending on specific market and tune) Fuel System Fuel Delivery: Bosch L-Jetronic Fuel Injection (for 320i models) Fuel Type: Unleaded Gasoline (typically 91 RON or higher) Technical Details Bore X Stroke: 84.0 mm x 80.0 mm (typical for 1.8L M10) Compression Ratio: Typically 8.3:1 or 8.8:1 (depending on variant) Ignition System: Electronic Ignition (e.g., breakerless) 🔧 Transmission Standard Type: 4-speed Manual Transmission Optional Type: 3-speed ZF Automatic Transmission (denoted by 'A' in model name, e.g., 320iA) Features Manual Gear Ratios: Specific ratios available within the manual for detailed analysis. Automatic Features: Torque converter, likely with a lock-up feature in later models. 📐 Dimensions Exterior Length: Approx. 4360 mm (171.7 in) Width: Approx. 1610 mm (63.4 in) Height: Approx. 1380 mm (54.3 in) Weights Curb Weight: Approx. 1200 - 1300 kg (2645 - 2866 lbs), depending on transmission and options. 🛡️ Safety Features Ratings Crash Test Info: While specific ratings from modern agencies are not available for this era, the E21 featured crumple zones and a robust safety cell for its time. Active Features Braking System: Front disc brakes, rear drum brakes. Passive Features Seatbelts: Standard lap and shoulder belts (front), lap belts (rear). Steering Column: Collapsible steering column for improved impact protection. 💡 Technology Features Infotainment Audio System: Factory radio typically a simple AM/FM unit, often with a cassette player in later models. Upgrades are common. Driver...