🏷️ Basic Information Identification Make: Audi Model: 90 B3 Model Generation: B3 Model Years: 1986, 1987, 1988, 1989, 1990, 1991 Codes Chassis Code: Type 89 (also referred to as B3) 👋 Introduction Market Position Segment: Compact Executive Sedan/Coupe Target Audience: DIY enthusiasts, independent mechanics, Audi owners seeking in-depth repair knowledge Competitive Analysis Competitors: BMW 3 Series (E30), Mercedes-Benz 190E (W201), Alfa Romeo 75 Key Features Distinguishing Features: Advanced Quattro all-wheel drive system (optional), refined interior, distinctive Audi styling Manual Value Proposition: Comprehensive, detailed, and accurate technical information for effective and safe vehicle maintenance and repair. 📋 Manual Details Coverage Areas Primary Coverage: Complete repair and service for Audi 90 B3 models 1986-1991 Secondary Coverage: Maintenance, diagnostics, adjustments, removal, installation, disassembly, assembly Page Count Total Pages: 2381 Manual Type Type: Workshop Service Manual Purpose: Repair and Maintenance Language Language: English Format File Format: PDF Download Type: Instant Download 📖 Manual Coverage Systems Covered Engine: Detailed coverage of engine mechanicals, fuel system, ignition, cooling, lubrication, exhaust Transmission: Manual and automatic transmission service, repair, and overhaul Drivetrain: Front-wheel drive and quattro all-wheel drive system components, axles, differentials Suspension: Front and rear suspension systems, shock absorbers, springs, control arms, wheel bearings Steering: Steering gear, power steering system, steering column Brakes: Brake system components (discs, pads, calipers, master cylinder, lines), ABS if equipped Electrical: Complete electrical system diagrams, wiring, lighting, ignition, starting, charging, accessories Bodywork: Body panels, doors, windows, locks, body sealing, exterior trim Interior: Interior trim, seats, dashboard, HVAC system, climate control HVAC: Heating, ventilation, and air conditioning system diagnosis and repair Diagnostics: Troubleshooting guides, symptom-based diagnostics, fault code information Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs Repair: Comprehensive step-by-step repair procedures for all major vehicle components Adjustments: Detailed procedures for adjustments on engine, brakes, suspension, and electrical systems Removal Installation: Instructions for removing and installing all vehicle parts and systems Disassembly Assembly: In-depth guides for disassembling and reassembling components Troubleshooting: Systematic troubleshooting guides for common and uncommon issues Technical Depth Depth: From basic maintenance to full engine rebuilds and complex diagnostics Detail Level: Bumper-to-bumper coverage with detailed explanations and pictorial diagrams Special Tools: References to specific Audi special service tools and their usage Specifications: Inclusion of factory specifications, torque values, wear limits, and tolerances 📊 Manual Specifications File Format Quality: High-resolution PDF, allowing for zooming and clear viewing of diagrams Searchable: Likely searchable text within PDF, facilitating quick information retrieval Print Quality Printable: Yes, all 2381 pages are printable Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) Compatibility Operating Systems: Windows, Mac, Linux OS Requirements Software: Adobe Reader or compatible PDF viewer ⚙️ Engine Specifications Primary Engine Engine Options Common: 2.3L (2309cc) inline-5 (NG engine code) producing approximately 130-136 hp. Also 2.0L and 2.2L inline-5 variants were available in some markets. Performance Horsepower Range: 110 hp (2.0L) to 136 hp (2.3L) Torque Range: 133 lb-ft (2.3L) to 140 lb-ft (2.3L) Fuel System Fuel Delivery: Bosch K-Jetronic (CIS) or Bosch KE-Jetronic (CIS-E) mechanical fuel injection Engine Construction Cylinder Layout: Inline-5 Valvetrain: SOHC (Single Overhead Camshaft) 🔧 Transmission Standard Standard Transmission: 5-speed Manual Optional Optional Transmission: 4-speed Automatic (ZF 4HP22) Features Drivetrain Options: Front-Wheel Drive (FWD) or quattro All-Wheel Drive (AWD) 📐 Dimensions Exterior Body Styles: 4-door Sedan, 2-door Coupe Wheelbase: Approx. 2610 mm (102.8 inches) Weights Curb Weight Range: Approx. 1200-1350 kg (2645-2976 lbs) 🛡️ Safety Features Ratings Era Safety Standards: Reflects safety standards of the late 1980s and early 1990s. Active Features ABS: Anti-lock Braking System (ABS) was an available option on later models. Passive Features Seatbelts: Three-point seatbelts, potentially with pre-tensioners. 💡 Technology Features Infotainment Audio System: Factory-installed radio/cassette player with optional amplifier and speaker upgrades. Driver Assistance ABS Availability: Optional ABS system, providing enhanced braking control. Connectivity Connectivity Features: Basic for its era, focused on vehicle functions rather than external connectivity. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 5,000-7,500 miles or 6-12 months, depending on driving conditions and oil used. Timing Belt Replacement: Crucial replacement interval, typically around 50,000-60,000 miles or 5 years for the 5-cylinder engines. Fluid Specifications Engine Oil Type: API SG or higher, SAE 5W-30, 10W-40 or 15W-50 depending on climate. Manual specifies specific viscosity grades. Coolant Type: Ethylene glycol based antifreeze with corrosion inhibitors (e.g., G11). Brake Fluid Type: DOT 3 or DOT 4. Transmission Fluid Manual: API GL-4 or GL-5 SAE 75W-90 or 80W-90 gear oil. Transmission Fluid Automatic: Dexron III or equivalent ATF. Known Issues Common Problems: Fuel distributor diaphragm leaks (K-Jetronic), coolant leaks (especially heater core), electrical connector corrosion, worn suspension bushings, exhaust manifold cracks (5-cylinder). Maintenance Importance: Adherence to maintenance schedules, particularly timing belt replacement, is critical for engine longevity. 📚 Vehicle History Brand Heritage Brand Focus: Audi has a long history of engineering innovation, particularly in quattro all-wheel drive technology and...