🏷️ Basic Information Identification Make: BMW Model: 3-series Chassis Code: E21 Model Year: 1979 Product Type: Service and Repair Manual 👋 Introduction Market Position Positioning: Targeted at BMW E21 owners and independent mechanics seeking factory-accurate repair information. Competitive Analysis Uniqueness: Distinguished by being vehicle-specific, not generic. Directly replicates dealership technician resources. Key Features Format Advantage: Single PDF manual for ease of use, eliminating the need to flip through multiple books. Durability Advantage: Digital format prevents grease, tears, and loss associated with physical manuals. Utility: Printable pages allow users to take only necessary information to the workspace. Value Proposition Cost Savings: Enables DIY repairs, reducing reliance on and cost of professional mechanics for common tasks. 📋 Manual Details Coverage Areas Models Covered: All BMW 3-series (E21) models Repairs Covered: A-Z (All repairs) Page Count Estimated Page Count: Not specified, but described as comprehensive. Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Digital Format: PDF Digital Compatibility: Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac compatible 📖 Manual Coverage Systems Covered Powertrain: Engine, Control System, Mechanical, Fuel Service Specifications, Emission Control, Intake Exhaust Cooling, Lube, Ignition Starting Charging, Auto Transmission, Clutch, Manual Transmission, Transfer Propeller Shaft, Drive Shaft, Differential, Axle Chassis And Suspension: Suspension, Tire & Wheel, Brake Control, Brake, Parking Brake, Steering Column, Power Steering Electrical And Comfort: Air Condition, Suppl Restraint System, Seat Belt, Engine Immobilizer, Cruise Control, Wiper & Washer, Door Lock, Meter Audio/Visual, Horn, Windshield/Glass Mirror, Instrument Panel, Electrical, Multiplex/Can Communication Body And Interior: Seat, Engine Hood/ Door, Exterior & Interior Procedures Included Repair Procedures: Complete step-by-step instructions for all repairs. Maintenance Procedures: Detailed maintenance procedures. Diagnostic Procedures: Diagnostic procedures for troubleshooting. Technical Depth Depth: Factory level, technician-grade detail. Comprehensive coverage from basic maintenance to complete repair and diagnosis. 📊 Manual Specifications File Format Format: PDF Searchability: Likely searchable PDF, enabling quick information retrieval. Print Quality Printability: All pages are printable. Image Enhancement: Ability to blow up images for enlarged printing. Binding Type Binding: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) Software Requirements PDF Reader: Adobe PDF Reader (free online) Unzipping Software: Winzip (free online) ⚙️ Engine Specifications Primary Engine Engine Family: BMW M10 inline-4 cylinder (Likely, for 1979 models) Engine Variants Engine Options: Likely includes 315 (1.8L), 316 (1.8L), 318 (1.8L), 320 (2.0L), 320i (2.0L Fuel Injection), and possibly early 323i (2.3L inline-6, though less common for '79 in some markets). The manual covers all models, implying it addresses these variations. Performance Hp And Torque: Specifications will vary by engine variant. For example, the M10 2.0L typically produced around 100-110 hp and 120-130 lb-ft of torque, with fuel-injected 'i' models offering slightly more. The 323i variant (if applicable for 1979 in target market) would feature the M20 inline-6, producing over 140 hp. Fuel System Fuel Delivery: Carburetor (e.g., Solex, Zenith) for non-'i' models, Bosch L-Jetronic or K-Jetronic fuel injection for 'i' models. Ignition System Ignition Type: Distributor-based ignition system, potentially with electronic advance on later models. Cooling System Cooling Type: Water-cooled, with a thermostat-controlled fan and radiator. 🔧 Transmission Standard Standard Transmission: 4-speed manual transmission (Getrag or ZF). Optional Optional Transmission: 3-speed automatic transmission (ZF 3HP18 or similar). Features Clutch Type: Single dry plate clutch, hydraulically actuated. Fluid Specifications Manual Transmission Fluid: GL-4 Gear Oil (Specific viscosity dependent on ambient temperature, typically 75W-90 or 80W-90). Automatic Transmission Fluid: Dexron II or equivalent ATF. 📐 Dimensions Exterior Wheelbase: Approx. 2565 mm (101 inches). Length: Approx. 4360 mm (171.7 inches). Width: Approx. 1620 mm (63.8 inches). Height: Approx. 1380 mm (54.3 inches). Weights Curb Weight: Ranges from approximately 1150 kg to 1300 kg depending on engine and equipment. Gross Vehicle Weight: Not explicitly stated, but typically around 1600-1700 kg. 🛡️ Safety Features Ratings Crash Test History: E21 models predate modern stringent crash testing standards. Likely to have received poor ratings by today's standards. The manual will detail the vehicle's structural components and safety systems for its era. Active Features Braking System: Front disc brakes, rear drum brakes. Some models may have optional front vented discs. The manual covers hydraulic system, pad/shoe replacement, bleeding, and adjustment. Steering System: Recirculating ball steering. Power steering was optional on some models. Manual covers steering box adjustment, tie rod replacement, and alignment procedures. Passive Features Seat Belts: Standard 3-point front seat belts, lap belts in rear. Manual covers seat belt maintenance and replacement. Body Construction: Unibody construction with crumple zones designed for the era. Manual details body panel repair and structural components. Supplemental Restraint System: N/A (No airbags or advanced SRS systems in this era). 💡 Technology Features Infotainment Audio System: Factory radios were typically AM/FM analog with cassette players. The manual covers dashboard and speaker removal/installation. Driver Assistance Cruise Control: Optional cruise control system available on some models. The manual includes...