🏷️ Basic Information Identification Make: BMW Model: 3 Series Model Variant: 320 Codes Chassis Code: E21 Generation Generation Name: First Generation (E21) 👋 Introduction Market Position Market Segment: Compact Executive Sedan Target Audience: Enthusiasts, DIY mechanics, professional technicians Competitive Analysis Key Competitors: Mercedes-Benz W123, Audi 80, Alfa Romeo Alfetta Key Features Design Philosophy: Sporty handling, driver-focused cockpit, solid build quality Manual Value Proposition: Enables comprehensive maintenance and repair, promoting vehicle longevity and optimal performance 📋 Manual Details Coverage Areas Model Years: 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984 Page Count Page Count: 910 Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF Download Type: Instant Download Printability: Printable Required Software: Adobe Reader Compatibility: Windows, Mac, Linux OS 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical, fuel delivery, ignition, cooling, lubrication, exhaust Drivetrain: Transmission (manual and automatic), clutch, driveshafts, differential Chassis: Suspension (front and rear), steering system, braking system Electrical: Charging system, starting system, lighting, instruments, wiring diagrams Bodywork: Body construction, interior trim, exterior trim, glass, body repair Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, tune-ups Repair: Component disassembly, assembly, repair, replacement Troubleshooting: Diagnostic procedures, fault finding, symptom analysis Adjustments: Carburetor adjustments, ignition timing, valve clearances, brake adjustments Installation: Component installation and removal procedures Technical Depth Depth Of Coverage: Comprehensive step-by-step procedures, detailed explanations, pictorial diagrams Illustrations: Detailed illustrations, exploded diagrams, drawings, photos Special Tools: Reference to special service tool numbers and usage Specifications: Service data, specifications, tightening torques, allowable limits Construction And Function: Information on construction and function of components 📊 Manual Specifications File Format PDF Quality: High quality, printable Print Quality Printability: All pages are printable Binding Type Binding Type: Digital (PDF) Paper Type Paper Type: Not Applicable (Digital) Completeness Completeness: 100% complete and intact, no missing/corrupt pages/sections ⚙️ Engine Specifications Primary Engine Engine Code: M10 Series (various configurations for 320i) Engine Type: Inline 4-cylinder, SOHC Performance Displacement Liters: 2.0 Horsepower Ps: Approx. 102-105 PS (depending on market and exact model year) Torque Nm: Approx. 160-170 Nm (depending on market and exact model year) Fuel System Fuel Delivery: Bosch L-Jetronic Fuel Injection (for 320i) Fuel Type: Unleaded Gasoline 🔧 Transmission Standard Transmission Type Standard: 4-speed Manual Optional Transmission Type Optional: 3-speed Automatic (ZF) Features Clutch Type: Single dry plate, hydraulically actuated 📐 Dimensions Exterior Length Mm: 4355 Width Mm: 1610 Height Mm: 1380 Weights Curb Weight Kg: Approx. 1150-1200 kg 🛡️ Safety Features Ratings Crash Test Era: Pre-modern era, limited standardized testing Active Features Braking System Type: Front ventilated discs, rear drums Passive Features Seat Belts: Standard front seat belts, optional rear seat belts 💡 Technology Features Infotainment Infotainment Features: Basic AM/FM radio with cassette player Driver Assistance Driver Assistance Features: None (standard features for the era) 🔧 Maintenance Service Intervals Oil Change Interval Km: 7,500 - 10,000 km (approx.) Major Service Interval Km: 40,000 - 60,000 km (approx.) Fluid Specifications Engine Oil Type: API SF/SG or equivalent (e.g., SAE 20W-50, 15W-40) Coolant Type: Ethylene glycol-based antifreeze (50/50 mix with distilled water) Brake Fluid Type: DOT 3 or DOT 4 Transmission Fluid Manual: GL-4 or GL-5 Gear Oil (viscosity dependent on temperature, e.g., 75W-90 or 80W-90) Transmission Fluid Automatic: Dexron II or equivalent Known Issues Common Wear Items: Brake components, suspension bushings, exhaust system, fuel injectors (if applicable), fuel pump Rust Prone Areas: Wheel arches, rocker panels, sills, floor pans Electrical Gremlins: Aging wiring harnesses, faulty relays, dashboard illumination issues 📚 Vehicle History Brand Heritage Brand Focus: Performance, engineering, luxury Model Evolution Introduction Year: 1975 Chassis Design: E21, first generation of the 3 Series, replaced the BMW 2002 Production Production Period: 1975-1983 Manufacturing Location: Germany 🏆 Awards & Recognition Recognitions Contemporary Acclaim: Praised for its sporty handling and driving dynamics, often considered a benchmark in its class.