🏷️ Basic Information Identification Make: BMW Model: 3 Series Chassis Code: E21 Generation: First Generation 👋 Introduction Market Position Positioning: Essential tool for owners and enthusiasts of the BMW E21 3 Series seeking to perform their own maintenance and repairs. Competitive Analysis Advantage: Provides factory-level information, saving significant labor costs compared to professional shop rates. Key Features Authenticity: Actual Genuine Factory Repair Manual, not third-party. Completeness: Covers all aspects of repair and maintenance for the specified model range. Accessibility: Digital download format allows for immediate access and on-demand printing. 📋 Manual Details Coverage Areas Applicable Years: 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984 Styles Covered: All Page Count Estimated Pages: Hundreds (exact number not specified, but described as comprehensive) Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF (Downloadable) 📖 Manual Coverage Systems Covered Engine Service Repair: Detailed procedures for engine maintenance, overhaul, and repair. Transmission Service Repair: Covers manual and automatic transmission service, including repairs and adjustments. Brake System: Includes maintenance, troubleshooting, and repair of hydraulic and mechanical brake components. Wiring Diagrams: Comprehensive electrical system diagrams for accurate diagnosis and repair. Electrical System: Detailed coverage of all electrical components, circuits, and troubleshooting. Suspension: Maintenance and repair of front and rear suspension systems. Periodic Lubrication: Specific lubrication points and schedules for optimal vehicle longevity. Steering: Service and repair procedures for the steering system. Cooling System: Maintenance, repair, and troubleshooting of the radiator, water pump, and thermostat. Fuel Injection Fuel System: Detailed coverage of fuel delivery, injection systems (e.g., Bosch L-Jetronic), and components. Emission System: Information on emission control components and servicing for compliance. Heater Air Conditional: Service and repair of HVAC systems. Engine Control System: Diagnosis and repair of engine management and control units. Chassis Body: Bodywork repair, structural integrity, and chassis component service. Restraint System: Information on seat belts and passive safety features. Interior: Service and repair related to interior trim and components. Differential Drive: Service and repair of the drivetrain and differential. Axle: Maintenance and repair of front and rear axles. General Maintenance: Routine service tasks and inspections. Troubleshooting: Advanced guide for diagnosing and correcting problems across all systems. Procedures Included Maintenance: Oil changes, filter replacements, fluid checks, tune-ups, lubrication, spark plug replacement. Troubleshooting: Diagnostic procedures for engine performance, electrical faults, brake issues, etc. Repair: Complete step-by-step repair instructions for all major vehicle systems. Rebuild: Detailed procedures for engine and transmission overhauls. Refurbish Restore: Guidance for restoring components and the overall vehicle. Tuning: Procedures for engine tuning and optimization. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to advanced diagnostics and complete rebuilds. Data Type: Official factory specifications, procedures, diagrams, and illustrations. 📊 Manual Specifications File Format Format: PDF Compatibility: Windows and Mac operating systems. Storage: Can be saved to hard drive or burned to CD-ROM. Print Quality Printability: Printable without restriction (individual pages or entire manual). Resolution: High resolution. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Usability Navigation: Easy to use, with numbered table of contents and search functionality. Instructions: Numbered instructions, detailed substeps, notes, cautions, and warnings. Illustrations: Detailed illustrations, drawings, photos, and enlarged inset diagrams. ⚙️ Engine Specifications Primary Engine Engine Family: BMW M10 (4-cylinder) and M20 (6-cylinder) Engine Variants Common Engines: 316 (M10 1.6L), 318 (M10 1.8L), 320/4 (M10 2.0L), 320i (M10 2.0L fuel injection), 323i (M20 2.3L fuel injection) Performance Horsepower Range: Approximately 75 hp (316) to 143 hp (323i) Torque Range: Varies by engine, typically 120 Nm to 190 Nm. Fuel System Carbureted Models: Solex or Pierburg carburetors on lower-end models. Fuel Injection Models: Bosch L-Jetronic or K-Jetronic fuel injection for improved performance and efficiency. 🔧 Transmission Standard Transmission Type: 4-speed manual (standard on most models) Optional Transmission Type: 3-speed automatic (optional on some models) Features Gearbox: Robust Getrag manual gearboxes. 📐 Dimensions Exterior Body Styles: 2-door sedan, 4-door sedan Weights Curb Weight: Approximately 1100-1300 kg depending on engine and configuration. 🛡️ Safety Features Ratings Crash Testing: Early E21 models predate modern stringent crash testing standards, but featured a reinforced safety cage. Active Features Brakes: Front disc brakes, rear drum brakes (later models may have rear discs). Passive Features Seat Belts: 3-point inertia reel seat belts in the front, lap belts in the rear. 💡 Technology Features Infotainment Audio System: Optional factory radio, typically analog tuner with cassette player in later models. Driver Assistance ABS: Not available on early models; optional on later models (e.g., 323i). Connectivity Connectivity Features: None; based on pre-digital era technology. 🔧 Maintenance Service Intervals Oil Change: Typically every 5,000-10,000 km or annually, depending on driving conditions. Tune Up: Spark plug replacement, ignition timing adjustment, carburetor adjustment as needed. Fluid Specifications Engine Oil: API SG/SH or SAE 20W-50/15W-40 (check manual for specific viscosity based on temperature). Coolant: 50/50 mixture of ethylene glycol-based antifreeze and...