🏷️ Basic Information Identification Make: Audi Model: 80/90 (B3 Chassis) Generation Code: B3 Production Years Covered: 1986, 1987, 1988, 1989, 1990, 1991 👋 Introduction Market Position Target Audience: Audi enthusiasts, independent repair shops, DIY mechanics working on B3 models. Competitive Analysis Value Proposition: Provides essential technical data for maintaining and repairing a classic Audi model, saving on dealership costs. Key Features Comprehensiveness: Covers all major mechanical and electrical systems for a complete repair solution. Accuracy: Based on official Audi factory service information. 📋 Manual Details Coverage Areas All Models Covered: Yes, all trim levels and engine variants within the specified years. Page Count Estimated Page Count: N/A (Digital format, extensive content) Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Detailed diagnosis, repair, and overhaul procedures for all gasoline engines. Engine Management: Ignition system, fuel injection systems (CIS-E, KE-Jetronic), emissions control. Transmission Manual: Repair, adjustment, and overhaul of manual gearboxes. Transmission Automatic: Diagnosis, fluid changes, and repair procedures for automatic transmissions. Drivetrain: Front-wheel drive (FWD) and Quattro all-wheel drive (AWD) systems, including differential, driveshafts, and CV joints. Suspension: Front McPherson struts, rear torsion beam/independent suspension (depending on model), wheel bearings, shock absorbers, springs. Steering: Power steering system diagnosis and repair, steering rack, tie rods. Brakes: Hydraulic systems, ABS (if equipped), brake discs, pads, calipers, master cylinder, lines. Electrical System: Wiring diagrams, component testing, charging system (alternator, battery), starting system (starter motor). Body And Chassis: Body panel repair, door mechanisms, glass replacement, chassis diagnostics. HVAC: Heating, ventilation, and air conditioning system maintenance and repair. Interior: Seating, dashboard, trim panel removal and installation. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks. Troubleshooting: Diagnostic flowcharts, common problems and solutions, symptom-based diagnosis. Repair: Step-by-step instructions for component replacement and repair. Rebuilds: Detailed procedures for engine, transmission, and other major component overhauls. Diagnostics: Electrical system testing, fuel system pressure testing, sensor diagnostics. Calibration: Engine timing adjustments, idle speed setting. Technical Depth Depth: Comprehensive, covering everything from basic fluid changes to full engine and transmission rebuilds. Diagnostic Tools: Information on using specific diagnostic tools and procedures relevant to the era. Torque Specifications: All critical torque specifications for fasteners and components. Wiring Diagrams: Detailed electrical schematic diagrams for all systems. 📊 Manual Specifications File Format Searchability: Searchable PDF text for quick information retrieval. Printability: Printable pages for easy workshop use. Print Quality Image Resolution: High-resolution images and diagrams for clarity. Binding Type Binding: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Codes: Commonly includes 4-cylinder: JN, NP, PM, PP, 3F, AEF; 5-cylinder: KV, NG, KG, KU, WC, WT. Displacement: 1.6L, 1.8L, 2.0L (4-cylinder); 2.2L, 2.3L (5-cylinder). Performance Horsepower Range: Approximately 75 hp to 170 hp, depending on engine variant. Torque Range: Approximately 120 Nm to 230 Nm, depending on engine variant. Fuel System Fuel Delivery: Carbureted (early models), Bosch CIS-E (Continuous Injection System - Electronic), and KE-Jetronic (K-Jetronic with Electronic Control) fuel injection. Fuel Type: Unleaded gasoline (Octane rating recommendations provided). Engine Management Ignition Type: Distributor-based ignition system with electronic control unit (ECU). Emissions Control: Catalytic converters, oxygen sensors, EGR (Exhaust Gas Recirculation) systems, vacuum advance/retard. 🔧 Transmission Standard Standard Transmission: 5-speed manual gearbox. Optional Optional Transmission: 3-speed or 4-speed automatic transmission. Features Drivetrain Options: Front-wheel drive (FWD) and permanent all-wheel drive (Quattro). Clutch Type: Dry single-plate clutch (manual transmission). 📐 Dimensions Exterior Body Styles: 4-door Sedan, 2-door Coupe, 5-door Avant (Wagon). Wheelbase: Approximately 2610 mm (102.8 in). Overall Length: Approximately 4400 mm (173.2 in). Weights Curb Weight: Approximately 1100 kg - 1400 kg, depending on model and drivetrain. Gross Vehicle Weight: N/A (specified per model variation in manual). 🛡️ Safety Features Ratings Crash Test Data: ERA standards of the time, Euro NCAP not established yet. Refer to specific vehicle tests from period publications. Active Features ABS: Anti-lock Braking System (ABS) available as an option on many models. Passive Features Seatbelts: Three-point inertia reel seatbelts for front occupants, lap belts for rear. Structure: Rigid safety cage, crumple zones, reinforced side impact protection (depending on specification). 💡 Technology Features Infotainment Audio System: Factory-installed radio/cassette player, optional CD player, speaker configurations vary by trim. Driver Assistance ABS Availability: ABS was an optional safety feature on many models. Connectivity Connectivity Features: Basic connectivity for the era; primarily related to the car's own systems (e.g., onboard diagnostics for fuel injection). 🔧 Maintenance Service Intervals Oil Change Interval: Typically 10,000 km (6,200 miles) or 12 months for synthetic oil, 7,500 km (4,700 miles) for conventional oil. Timing Belt Replacement: Recommended every 90,000 - 120,000 km (56,000 - 75,000 miles) or 5-7 years for interference engines. Coolant Flush: Typically every 2-3 years or as specified by fluid type. Fluid Specifications Engine Oil Type: Refer to manual for specific viscosity grades like...