🏷️ Basic Information Identification Make: Audi Model: 80 / 90 Coupe Product Name: Audi 80 90 Coupe Complete Workshop Service Repair Manual 1988-1992 Codes Platform Code: B3 (Typ 89) 👋 Introduction Market Position Vehicle Segment: Compact Executive / Sports Coupe Target Audience: Enthusiasts, DIY mechanics, owners of classic Audi models Competitive Analysis Key Competitors: BMW 3 Series (E30), Mercedes-Benz 190E, Ford Sierra Cosworth, Opel Calibra Key Features Vehicle Appeal: Stylish coupe design, Quattro all-wheel drive option, build quality, performance variants (e.g., Audi Sport) Manual Value Proposition: Enables cost-effective DIY repairs and maintenance, preserving the vehicle's condition and value. 📋 Manual Details Coverage Areas Years Covered: 1988, 1989, 1990, 1991, 1992 Models Covered: All Audi 80, 90, and Coupe variants Engine Variants Covered: All engine types and configurations Transmission Types Covered: All transmission types (manual and automatic) Trim Levels Covered: All trim levels Page Count Estimated Page Count: Extensive (typically 1000+ pages for a complete factory-style manual) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine: Engine mechanical, lubrication, cooling, fuel injection, ignition, emissions control Transmission: Manual and automatic transmission overhaul, diagnostics, fluid service Drivetrain: Clutch, drive shafts, differentials, axle components Suspension: Front and rear suspension, steering system, wheel alignment Brakes: Brake system hydraulics, components (calipers, rotors, pads), ABS diagnostics Electrical: Battery, charging system, starting system, lighting, wiring diagrams, fuses, relays Body: Body panels, doors, windows, interior trim, convertible top mechanism (if applicable) HVAC: Heating, ventilation, and air conditioning systems Restraints: Seat belts, airbags (if equipped) Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks, spark plugs Troubleshooting: Diagnostic procedures for common and uncommon faults, symptom-based troubleshooting charts Repair: Detailed step-by-step repair instructions for all major and minor components Overhaul: Complete engine and transmission rebuild procedures Diagnostics: Fault code interpretation, circuit testing, sensor testing Installation: Component replacement and installation guidance Technical Depth Depth: Comprehensive, covering routine maintenance to full engine and transmission rebuilds Detail Level: Includes detailed diagrams, torque specifications, and diagnostic data 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text within the PDF document Print Quality Printability: Printable pages, chapters, or entire manual Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Family: VW Group EA827 (and derivatives) Common Engine Codes: JN, NP, PM, RP, ABT, AAD, AAN (for 20V Turbo), 3B (for 20V Turbo Quattro) Displacement Range: 1.6L, 1.8L, 2.0L, 2.2L, 2.3L (5-cylinder) Performance Horsepower Range: Approximately 75 hp to 220 hp (for Audi Sport/20V Turbo models) Torque Range: Approximately 120 Nm to 309 Nm Fuel System Fuel Delivery: Bosch CIS-Jetronic, Bosch KE-Jetronic, Bosch Motronic EFI Fuel Type: Unleaded gasoline (Octane rating as per vehicle specification) 🔧 Transmission Standard Manual Transmission: 5-speed manual gearbox Optional Automatic Transmission: 3-speed or 4-speed automatic transmission Features Drivetrain Options: Front-wheel drive (FWD), Quattro all-wheel drive (AWD) Fluid Specifications Manual Transmission Fluid: API GL-4, SAE 75W-90 or 80W-90 (refer to manual for specific viscosity) Automatic Transmission Fluid: G 052 162 A1 (or equivalent Dexron III/Mercon) 📐 Dimensions Exterior Body Styles: 2-door Coupe Weights Curb Weight Range: Approx. 1200 kg - 1450 kg (depending on engine and drivetrain) 🛡️ Safety Features Ratings Crash Test Data: Limited publicly available data for this specific era, but generally considered robust for its time. Active Features Braking System: Front ventilated discs, rear discs (standard or optional depending on model/engine) ABS: Anti-lock Braking System (ABS) was an optional feature on many models. Passive Features Airbags: Driver's side airbag became available/standard later in the production run. Seat Belts: Three-point seat belts with pretensioners. 💡 Technology Features Infotainment Audio System: Factory-installed radio/cassette systems, often with optional amplifier. Driver Assistance Cruise Control: Optional on higher trim levels. Connectivity Interior Features: Power windows, central locking, and optional sunroof were common features. 🔧 Maintenance Service Intervals Oil Change: Every 10,000-15,000 km or 12 months, whichever comes first. Timing Belt: Typically every 60,000-90,000 km or 5-6 years (critical component, refer to manual for specific engine code). Fluid Specifications Coolant: G 11 specification coolant (blue/green) or equivalent, mixed 50/50 with distilled water. Brake Fluid: DOT 3 or DOT 4 (refer to manual for exact specification). Power Steering Fluid: G 002 000 specification (or Pentosin CHF 11S equivalent). Known Issues Engine Cooling: Plastic coolant flange and thermostat housing can become brittle; check for leaks. Electrical Systems: Degradation of wiring insulation, particularly in engine bay; fuel pump relay failures. Suspension Components: Worn control arm bushings, ball joints, and tie rod ends due to age and mileage. Fuel Injection System: CIS-Jetronic/KE-Jetronic systems can be sensitive to air leaks and sensor issues. 📚 Vehicle History Brand Heritage Audi Philosophy: Known for Quattro all-wheel drive, engineering precision, and premium build quality. Model Evolution B3 Platform: The Audi 80/90 (B3) generation introduced significant advancements in aerodynamics, safety,...