🏷️ Basic Information Identification Make: BMW Model: 3 Series Generation Code: E21 Product Name: BMW 3 Series E21 Service Repair Manual 1975-1983 👋 Introduction Market Position Target Audience: BMW E21 owners, independent repair shops, and automotive enthusiasts seeking comprehensive repair guidance. Competitive Analysis Value Proposition: Provides professional-grade repair and maintenance information, equivalent to what is used by BMW technicians, at an accessible price point via instant download. Key Features Accessibility: Instant download allows for immediate access to repair information. Completeness: Covers all repair topics and models within the specified year range. Usability: Easy-to-read PDF format with detailed explanations and visual aids. 📋 Manual Details Coverage Areas All Models Covered: True Repair Scope: A-Z (All Repairs Covered) Page Count Estimated Page Count: Extensive (Professional Quality Information) Manual Type Type: Service Repair Workshop Manual Language Language: English Format Delivery Method: Instant Download 📖 Manual Coverage Systems Covered Engine And Clutch: Detailed repair and overhaul procedures. Transmissions: Service, repair, and rebuild for manual and automatic transmissions. Cooling Systems: Maintenance, diagnosis, and repair of radiators, pumps, and thermostats. Fuel And Exhaust: Carburetor/injection systems, fuel pumps, exhaust manifold, catalytic converter (if applicable). Ignition And Electrical: Distributor, ignition coils, starter, alternator, battery, lighting, and accessories. Brakes And Brake Assembly: Disc and drum brake systems, hydraulic components, ABS (if applicable). Wheels And Tires: Tire pressure, wheel alignment, balancing, and mounting. Steering And Suspension: Power steering, steering rack, ball joints, control arms, shock absorbers, springs. Frame And Bodywork: Chassis, body panels, doors, windows, bumpers, and rust repair. Wiring Diagrams: Comprehensive electrical schematics for all systems. Fault Finding Troubleshooting: Systematic diagnostic procedures for common and uncommon problems. Maintenance And Servicing: Regular maintenance tasks, fluid changes, filter replacements, and inspections. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug servicing, belt adjustments. Engine Rebuild: Complete engine disassembly, inspection, and reassembly. Transmission Overhaul: Detailed steps for transmission repair and rebuilding. Brake System Repair: Brake pad/shoe replacement, caliper/wheel cylinder servicing, brake fluid bleeding. Suspension Component Replacement: Ball joint, tie rod end, control arm, and shock absorber replacement. Electrical Troubleshooting: Diagnosing and repairing electrical faults using wiring diagrams. Body Panel Repair: Procedures for minor dent repair, panel replacement, and rust remediation. Diagnostics: Systematic fault diagnosis for all major vehicle systems. Technical Depth Depth: Professional-level, detailed repair and diagnostic information suitable for mechanics and advanced DIYers. Visual Aids: High-quality pictures and diagrams included for clarity. 📊 Manual Specifications File Format Format: PDF Compatibility: All Operating Systems (Windows, MAC) Print Quality Quality: Professional Quality Information Binding Type Binding: Digital (PDF format) Paper Type Paper Type: Not Applicable (Digital) ⚙️ Engine Specifications Primary Engine Engine Variants Covered: 4-cylinder (M10) and 6-cylinder (M20) engines (e.g., 316, 318, 320, 323i). Performance Typical Displacement Range: 1.6L to 2.3L (1573cc to 2316cc) Typical Horsepower Range: 75 hp to 143 hp (depending on engine variant and market) Typical Torque Range: 110 Nm to 190 Nm (depending on engine variant and market) Fuel System Fuel Delivery: Carbureted (e.g., Solex, Zenith) and Bosch K-Jetronic fuel injection systems. Engine Management Ignition System: Breakerless electronic ignition systems (e.g., Bosch) 🔧 Transmission Standard Manual Transmission: 4-speed and 5-speed manual transmissions. Optional Automatic Transmission: 3-speed and 4-speed automatic transmissions (e.g., ZF). Features Clutch Type: Hydraulically operated single-plate dry clutch. 📐 Dimensions Exterior Body Styles: 2-door coupe and 4-door sedan. Wheelbase: Approx. 2570 mm (101.2 in) Length: Approx. 4375 mm (172.2 in) Width: Approx. 1625 mm (64.0 in) Height: Approx. 1380 mm (54.3 in) Weights Curb Weight: Approx. 1100 - 1300 kg (depending on model and specifications) 🛡️ Safety Features Ratings Crash Test Results: Limited official crash test data available for this era, but known for robust construction. Active Features Braking System: Front disc brakes, rear drum brakes. Optional rear discs on some models. Passive Features Seatbelts: Standard seatbelts, often three-point front seatbelts. 💡 Technology Features Infotainment Audio System: Basic AM/FM radio, often with cassette player. Aftermarket upgrades common. Driver Assistance Features: Limited to standard driver aids of the era; no modern electronic driver assistance systems. Connectivity Features: No factory connectivity features; analog systems only. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000-10,000 km (3,000-6,000 miles) or annually, depending on usage and oil type. Consult manual for specific intervals. Filter Replacement Interval: Air filter and fuel filter usually replaced every 20,000-30,000 km (12,000-18,000 miles). Spark Plug Replacement: Typically every 20,000-40,000 km (12,000-25,000 miles), depending on plug type. Fluid Specifications Engine Oil Type: SAE 20W-50 or 10W-40 API SG/CD or equivalent (check manual for precise specs). Coolant Type: Ethylene glycol-based antifreeze, mixed 50/50 with distilled water. Brake Fluid Type: DOT 3 or DOT 4 brake fluid. Transmission Fluid Manual: GL-4 gear oil (e.g., SAE 75W-90 or 80W-90). Transmission Fluid Automatic: Dexron III or equivalent ATF (check manual for specific type). Known Issues Common Problems: Rust in wheel arches, sills, and strut towers; aging rubber bushings; fuel...