🏷️ Basic Information Identification Make: BMW Model: 3 Series Generation: E21 Production Years: 1975-1983 Chassis Code: E21 📋 Manual Details Coverage Areas General Repairs: All Repairs A-Z Mechanical Repairs: Included Electrical Repairs: Included Routine Maintenance: Included Tune Up Procedures: Included Engine Removal Installation: Included Cylinder Head Valve Train: Included Engine Block: Included Engine Lubrication: Included Intake Exhaust System: Included Cooling Heating: Included Fuel Emissions: Included Transaxle: Included Clutch: Included Manual Transmission: Included Automatic Transmission: Included Differential: Included Driveshaft: Included Steering: Included Suspension: Included Brakes ABS: Included Body: Included Heater Air Conditioning: Included Automatic Climate Control: Included Electrical Srs: Included Wiring Diagrams: Included Valve Timing Procedures: Included Chain Gear Replacement: Included Safety Precautions: Included Special Tools: Included Tensioner Adjustments: Included Tightening Torques: Included Timing Marks: Included Tensioner Release Reset: Included Chain Routing Sprocket Gear Timing: Included Model Coverage: All Models Engine Type Coverage: All Engine Types Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF Features Illustrations: Tons of Detailed Pictures & Diagrams Printability: All Pages Printable Delivery: Super Fast Download Delivery Licensing: Use As Many Times As You Like, Never Time Out or Expire ⚙️ Engine Specifications Primary Engine Engine Types Offered: M10 (4-cylinder), M20 (6-cylinder) Performance M10 2.0L Horsepower: Approx. 100-105 hp (depending on variant) M20 2.3L Horsepower: Approx. 143 hp Fuel System Fuel Delivery M10: Carburetor (e.g., Zenith Stromberg, Solex) Fuel Delivery M20: Fuel Injection (Bosch L-Jetronic) 🔧 Transmission Standard Transmission Options: 4-speed Manual, 5-speed Manual, 3-speed Automatic Features Rear Wheel Drive: Standard on all models 📐 Dimensions Exterior Body Styles: 2-door Coupe, 4-door Sedan 🛡️ Safety Features Features Seat Belts: Standard front seat belts, optional rear seat belts Headlights: Halogen headlights available on later models 🔧 Maintenance Service Intervals Oil Change Interval: Refer to specific model year and engine (typically 3,000-5,000 miles) Fluid Specifications Engine Oil Type: Refer to manual (e.g., SAE 20W-50, SAE 10W-40)