🏷️ Basic Information Identification Make: Audi Model: 80 B4 Year: 1991 Codes Chassis Code: Typ 8C Generation Generation Name: B4 Generation Years: 1991-1996 👋 Introduction Market Position Target Audience: Audi 80 B4 owners, DIY mechanics, independent repair shops Value Proposition: Cost-effective alternative to expensive factory manuals, comprehensive repair information Competitive Analysis Comparison To Factory Manuals: Offers similar coverage and technical detail to original factory shop manuals, delivered digitally Key Features Digital Delivery: Instant email delivery, no shipping costs or wait times Platform Compatibility: Compatible with all PC-based Windows operating systems and Mac Illustrations: Numerous pictures and diagrams included for clarity Information Source: Similar to factory shop manual content, providing in-depth technical repair information 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive workshop service and repair Completeness: Stated to be complete, covering 'Every part of this car'. Page Count Estimated Page Count: High, comparable to factory manuals (exact count not provided) Manual Type Type: Workshop Service / Repair Manual Language Language: English (inferred from product description) Format Format: PDF 📖 Manual Coverage Systems Covered Engine Systems: Engine overhaul, fuel system, cooling system, exhaust system, emission control systems Drivetrain Systems: Transmission (manual and automatic), clutch, driveshafts Suspension Steering: Suspension components, steering system, wheel alignment Braking Systems: Brake system diagnostics, repair, and maintenance Electrical Systems: Complete electrical system troubleshooting, wiring diagrams, lighting, ignition, starting, charging Body Chassis: Body repair, interior trim, glass, doors, latches, seals HVAC: Heating and Air Conditioning system service and repair Procedures Included Maintenance Procedures: Lubrication, fluid changes, filter replacements, scheduled maintenance Repair Procedures: Component removal, installation, rebuilding, and adjustment for all covered systems Diagnostic Procedures: Troubleshooting guides, fault code interpretation (where applicable), symptom-based diagnosis Technical Specifications: Torque specifications, clearances, fluid capacities, electrical values Wiring Diagrams: Comprehensive wiring diagrams for electrical systems, crucial for troubleshooting electrical faults. Technical Depth Depth: Complete rebuilds, advanced diagnostics, detailed component-level repair 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) Searchability: Searchable text (inferred from PDF standard capabilities) Distribution: Digital email delivery Print Quality Printability: Printable in full or sections, high-quality output Binding Type Binding: Digital (no physical binding) Paper Type Paper Type: N/A (digital format) ⚙️ Engine Specifications Primary Engine Engine Options 1991: 2.0L (1984cc) I4 (AAD, ABT codes), 2.3L (2309cc) I5 (NG, NF codes), 2.6L (2598cc) V6 (ABC code) - Note: Specific engine availability for the 1991 model year needs confirmation by VIN. Performance Horsepower Range Typical: Approximately 115 PS to 150 PS depending on engine variant Torque Range Typical: Approximately 160 Nm to 220 Nm depending on engine variant Fuel System Fuel Delivery: Fuel Injection (MPI - Multi-Point Injection) for most variants Engine Design Cylinder Configuration: Inline-4 and Inline-5, V6 Valve Train: SOHC (Single Overhead Camshaft) for 4-cylinder, DOHC (Double Overhead Camshaft) for 5-cylinder and V6 🔧 Transmission Standard Standard Transmission: 5-speed Manual Transmission Optional Optional Transmission: 4-speed Automatic Transmission (e.g., 01B) Features Drive Type: Front-Wheel Drive (FWD), with optional quattro All-Wheel Drive (AWD) 📐 Dimensions Exterior Body Styles: Sedan (4-door), Avant (Wagon/Estate), Coupe (though the Coupe often had a B3 chassis, B4 also saw the facelifted Coupe) Wheelbase Typical: Approximately 2610 mm Overall Length Typical: Approximately 4405 mm (Sedan) Weights Curb Weight Range: Approximately 1200 kg to 1450 kg, depending on engine and drivetrain 🛡️ Safety Features Ratings Safety Standards: Designed to meet contemporary European safety standards for the early 1990s. Active Features Active Safety Features: Anti-lock Braking System (ABS) was often an option, Power-assisted steering Passive Features Passive Safety Features: Crumple zones, reinforced passenger cell, three-point seatbelts, driver airbag (optional on many models) 💡 Technology Features Infotainment Infotainment System: Basic AM/FM radio with cassette player was standard. Optional CD players were available. Later models might have had slightly more advanced systems. Driver Assistance Driver Assistance Features: Limited by contemporary standards. ABS was an option. Cruise control was optional on many models. Connectivity Connectivity Features: No significant modern connectivity features like Bluetooth or USB as standard. This was a product of its time. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 10,000-15,000 km or 1 year, whichever comes first (dependent on oil type and driving conditions - consult manual for specifics). Oil Specifications Engine Oil Type: API SG/SH or ACEA A2/A3, Viscosity often 5W-40 or 10W-40 (verify with specific engine and climate). Fluid Specifications Coolant Type: G11 (Ethylene Glycol based) antifreeze, mixed 50/50 with distilled water. Brake Fluid Type: DOT 3 or DOT 4 (verify manual for exact specification). Known Issues Common Wear Items: Suspension bushings, exhaust system corrosion, ignition coil packs, fuel pump, window regulators, ABS sensor failures. Engine Specific Issues: Coolant flange leaks on some 5-cylinder engines, potential head gasket issues if overheated. Electrical Gremlins: Intermittent electrical faults can occur due to age, especially in wiring harnesses and connectors. 📚 Vehicle History Brand Heritage Audi Heritage: Audi, a German luxury automotive manufacturer with a long history...