🏷️ Basic Information Identification Make: Audi Model: 90 Chassis Code: B3 Model Years Covered: 1986, 1987, 1988, 1989, 1990, 1991 Codes Audi 90 B3 Platform Code: Type 85 👋 Introduction Market Position Target Audience: Audi 90 B3 owners seeking comprehensive repair and maintenance information Value Proposition: Empowers owners to perform repairs and maintenance themselves, saving significant labor costs Competitive Analysis Competitor Manuals: Distinguished from aftermarket or Haynes-style manuals by its factory origin and completeness Key Features Completeness: The 'COMPLETE official full factory service repair manual' Factory Authorization: Contains information known by factory-trained technicians Usability: Easy to use, no advanced computer skills required; print only what's needed 📋 Manual Details Coverage Areas General Maintenance: Included Troubleshooting: Included Engine Service Repair: Included Transmission Service Repair: Included Brake System: Included Wiring Diagrams: Included Electrical System: Included Suspension: Included Periodic Lubrication: Included Steering: Included Cooling System: Included Fuel Injection Fuel System: Included Emission System: Included Heater Air Conditioning: Included Engine Control System: Included Chassis Body: Included Restraint System: Included Interior: Included Differential Drive: Included Axle: Included Page Count Estimated Pages: Hundreds of pages (specific count not provided, but extensive) Manual Type Type: Factory Service Repair Manual Authenticity: Actual Genuine Repair Service Factory Manuals (Not 3rd party) Language Language: English Format File Format: PDF Delivery Method: Downloadable Software Requirement: Adobe PDF Reader Platform Compatibility: All PC-based Windows operating systems and Mac Printability Print Restriction: Printable without any restriction Print Options: Print entire manual or selected pages 📖 Manual Coverage Systems Covered Engine Types: Covers all engine variants offered for the B3 chassis (e.g., 2.3L, 2.2L Turbo for the 'quattro' variant, though the '90' specifically focused on the naturally aspirated 5-cylinders) Transmission Types: Manual and Automatic transmissions Drivetrain: Front-wheel drive (FWD) and all-wheel drive (quattro) systems Electrical Components: Comprehensive coverage including starting, charging, ignition, lighting, and accessory systems Climate Control: Heating, ventilation, and air conditioning (HVAC) systems Body And Chassis: Includes body panels, doors, windows, interior trim, and structural components Procedures Included Diagnostic Procedures: Advanced troubleshooting guide for diagnosing problems Repair Procedures: Detailed, step-by-step instructions for all repair tasks Maintenance Tasks: Routine maintenance, fluid changes, filter replacements, and inspections Rebuild Procedures: Procedures for rebuilding major components like engines and transmissions Tuning Procedures: Instructions for engine tuning and performance adjustments Technical Depth Depth Of Information: Covers everything needed to repair, maintain, rebuild, refurbish, or restore the vehicle Illustrations: Includes hundreds of illustrations, diagrams, and photos Instruction Format: Numbered instructions, detailed substeps, notes, cautions, and warnings Diagnostic Tools Mention: Implied coverage for use of factory-level diagnostic tools and procedures 📊 Manual Specifications File Format Resolution Quality: High resolution Searchability: Search function enabled within the PDF Print Quality Printing Clarity: All pages printable with clarity Binding Type Delivery Binding: Digital download (user can print and bind) Paper Type Recommended Paper: Standard copier paper (user choice for printing) ⚙️ Engine Specifications Primary Engine Engine Configuration: Inline 5-cylinder (typically) Displacement Common: 2.3 liters (2309 cc) Engine Code Example: NG (for 2.3E) Performance Horsepower Typical 2.3L: Approx. 130-137 hp @ 5600-5800 rpm (depending on market and exact tune) Torque Typical 2.3L: Approx. 140-145 lb-ft @ 3000-3500 rpm Fuel System Fuel Delivery: Bosch K-Jetronic (CIS) or Bosch KE-Jetronic (CIS-E) mechanical fuel injection Fuel Type: Unleaded gasoline 🔧 Transmission Standard Standard Transmission Type: 5-speed manual Optional Optional Transmission Type: 4-speed automatic (e.g., ZF 4HP22) Features Drivetrain Options: Front-Wheel Drive (FWD) and Audi's quattro permanent All-Wheel Drive (AWD) 📐 Dimensions Exterior Body Styles: 4-door Sedan (Saloon) Weights Curb Weight Approx: 2,800 - 3,000 lbs (1270 - 1360 kg), varies with drivetrain and options 🛡️ Safety Features Ratings Crash Test Standards: Information on safety ratings for this era may be limited or varied by region; manual will detail relevant safety systems Active Features Braking System: Front: Ventilated discs; Rear: Solid discs Passive Features Seatbelts: Front and rear seat belts Body Structure: Reinforced safety cage construction 💡 Technology Features Infotainment Audio System: Factory or dealer-installed AM/FM cassette players, potentially with premium sound options (e.g., Bose). Driver Assistance ABS: Anti-lock Braking System (ABS) was an option on many models, particularly with quattro. Connectivity Original Connectivity: Limited to basic car functions; no modern infotainment or smartphone integration 🔧 Maintenance Service Intervals Oil Change Interval: Typically 5,000 - 7,500 miles (8,000 - 12,000 km) or 6-12 months, refer to manual for exact specification based on driving conditions Timing Belt Replacement: Critical component; typically every 60,000 miles (96,000 km) or 5 years. The manual will specify the exact interval and procedure. Fluid Specifications Engine Oil Type: Multi-viscosity synthetic or semi-synthetic oil (e.g., 5W-30, 10W-40) meeting specific API/ACEA standards. Manual will detail exact specs. Coolant Type: Ethylene glycol-based antifreeze mixed with distilled water. Manual will specify correct mixture ratio and G11/G12 designation if applicable. Brake Fluid Type: DOT 3 or DOT 4 brake fluid. Manual will specify. Transmission Fluid Manual: Gear oil...