🏷️ Basic Information Identification Make: Audi Model: 90 Quattro Year: 1994 👋 Introduction Market Position Market Segment: Premium compact executive sedan. Competitive Analysis Primary Competitors: BMW 3 Series, Mercedes-Benz 190E, Acura Legend, Lexus ES 250/300. Key Features Quattro AWD: The signature Audi all-wheel-drive system, providing exceptional traction and stability in various conditions. Build Quality: Known for solid German engineering and high-quality interior materials. Design Language: Stylish and understated European design. Manual Value Proposition Diy Support: Empowers DIY enthusiasts to perform repairs and maintenance, saving on labor costs. Information Access: Provides instant, convenient access to comprehensive OE-derived repair information. 📋 Manual Details Identification Manual Type: Service and Repair Manual Software Manual Source: Licensed OE materials via RepairSurge Format: Online Software/Web-based Access Language: English Access Duration: 1 Year Compatibility: PC, Laptop, Smartphone, Tablet (with internet browser) 📖 Manual Coverage Systems Engine: Complete service, repair, and diagnostics for all engine variants. Drivetrain: Detailed coverage of Quattro all-wheel-drive system, differentials, axles, and driveshafts. Suspension: Repair and maintenance procedures for front and rear suspension, shocks, struts, control arms, and bushings. Steering: Service and repair for steering rack, power steering pump, tie rods, and steering column. Brakes: Comprehensive information on brake system components, including pads, rotors, calipers, lines, and ABS system. Electrical: Extensive wiring diagrams, component testing, diagnosis, and repair for all electrical systems. HVAC: Service and repair procedures for heating, ventilation, and air conditioning systems, including refrigerant handling. Bodywork: Information on body panel removal, installation, adjustments, and basic body repair concepts. Procedures Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, tire rotations, spark plug replacement, belt inspection. Troubleshooting: Diagnostic procedures and symptom-based troubleshooting guides for common and complex issues. Component Replacement: Detailed step-by-step instructions for replacing major and minor vehicle components. Engine Rebuild: Information on engine disassembly, inspection, component specifications, and reassembly (depth may vary). Transmission Service: Fluid changes, seal replacement, and potential repair procedures for the transmission. Brake System Repair: Pad and rotor replacement, caliper service, brake line bleeding, and ABS sensor diagnosis. Electrical Diagnostics: Testing of sensors, actuators, ECUs, and wiring harnesses using multimeter and diagnostic tools. Technical Depth Diagnostic Capabilities: Advanced diagnostic procedures, including interpretation of diagnostic trouble codes (DTCs) and sensor data. Repair Complexity: Covers everything from basic maintenance to complex repairs requiring specialized tools and knowledge. 📊 Manual Specifications File Format File Format: Web-based, digital access (specific file types not applicable in the traditional sense). Print Quality Print Quality: N/A (Digital format, printable pages may have variable quality based on user printer). Binding Type Binding Type: N/A (Digital format). Paper Type Paper Type: N/A (Digital format). ⚙️ Engine Specifications Primary Engine Engine Code: ADC (for 2.6L V6) Engine Type: V6 SOHC (Single Overhead Camshaft) Displacement: 2.6 Liters (2592 cc) Performance Horsepower: 150 hp @ 5500 rpm (approximate, depending on market/tune) Torque: 220 Nm (162 lb-ft) @ 3500 rpm (approximate) Fuel System Fuel Delivery: Electronic Fuel Injection (Bosch Motronic) Fuel Type: Unleaded Gasoline (91 octane or higher recommended) Engine Management Ignition System: Distributorless Ignition System (DIS) 🔧 Transmission Standard Transmission Type: 5-speed Manual Transmission Optional Transmission Type: 4-speed Automatic Transmission (Tiptronic not available in '94) Features Quattro Integration: Integrated with the Quattro permanent all-wheel-drive system via a viscous coupling center differential. Fluid Specifications Manual Transmission Fluid: API GL-4 or GL-5, SAE 75W-90 synthetic gear oil (check specific manual for exact OE spec). Automatic Transmission Fluid: G 052 162 A2 (or equivalent ATF Dexron II/III specification, verify with OE manual) 📐 Dimensions Exterior Length: 4506 mm (177.4 in) Width: 1712 mm (67.4 in) Height: 1395 mm (55.0 in) Weights Curb Weight: Approx. 1450 kg (3197 lbs) for manual transmission Quattro. Gross Vehicle Weight Rating: Specific GVWR varies, typically around 1950 kg. 🛡️ Safety Features Ratings NHTSA Frontal Impact: Not directly rated under the current NHTSA system for this era, but known for robust chassis. Active Features ABS: Standard Anti-lock Braking System (ABS). Quattro: Quattro AWD contributes significantly to active safety by enhancing traction and stability. Passive Features Airbags: Driver-side airbag standard. Seatbelts: Front and rear seat belts. Body Structure: Reinforced passenger safety cell with crumple zones. 💡 Technology Features Infotainment Audio System: Factory fitted cassette player with AM/FM radio. Optional CD player might be present on some trims. Speakers: Typically 4 or 6 speaker systems. Driver Assistance Cruise Control: Electronic cruise control system typically standard. Connectivity Connectivity Features: Limited by era. Basic connectivity primarily through the audio system. 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500-10,000 miles (12,000-16,000 km) or 12 months, whichever comes first, using synthetic oil. Timing Belt Replacement: Every 60,000-80,000 miles (96,000-128,000 km). Critical to prevent catastrophic engine damage. Includes idler pulleys and water pump. Spark Plug Replacement: Every 30,000-60,000 miles, depending on spark plug type (copper vs. platinum/iridium). Fluid Specifications Engine Oil Type: SAE 5W-40 or 5W-30 synthetic engine oil meeting VW 502 00 /...