🏷️ Basic Information Identification Make: Audi Model: 90 Year: 1993 Codes Chassis Code: Type 89 (B3) 👋 Introduction Market Position Segment: Compact Executive Sedan / Coupe Target Audience: Audi enthusiasts, DIY mechanics, independent repair shops specializing in European vehicles Competitive Analysis Competitors 1993: BMW 3 Series (E36), Mercedes-Benz 190E (W201), Acura Integra, Lexus ES250 Key Features Vehicle Usp: Quattro all-wheel drive, refined interior, sophisticated styling for its era Manual Value Usefulness: Essential for maintaining and repairing the complex German engineering of the 1993 Audi 90, offering factory-level detail. 📋 Manual Details Coverage Areas Manual Type: Factory Service Manual / Repair Manual Language: English Format: Printed Book Page Count Page Count: Approximately 1200+ 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel, ignition, exhaust, cooling, lubrication, emissions control, Quattro AWD system Chassis: Suspension (front & rear), steering, brakes (ABS included), wheels, tires Electrical: Wiring diagrams, lighting, instruments, ignition, starting, charging, body electronics, HVAC controls, power windows/locks Body: Body construction, interior trim, exterior trim, doors, windows, body sealing, collision repair basics Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks, belt replacement, spark plug service Diagnostics: Troubleshooting guides, symptom-based diagnostics, diagnostic trouble codes (DTCs) for applicable systems (e.g., ABS) Repair: Component removal and installation, component overhaul, system adjustments, torque specifications Engine Rebuild: Detailed procedures for engine disassembly, inspection, component replacement, and reassembly. Transmission Overhaul: Procedures for manual and automatic transmission repair and rebuilding. Suspension Repair: Instructions for replacing struts, shocks, control arms, bushings, and steering components. Brake System Service: Detailed steps for brake pad/rotor replacement, caliper service, bleeding the brake system, and ABS component troubleshooting. Electrical Troubleshooting: Comprehensive wiring diagrams, component testing procedures, and diagnostic flowcharts for electrical systems. Body And Interior: Guidance on removing and installing interior trim panels, door components, and exterior body moldings. Technical Depth Depth Level: Comprehensive rebuild procedures, advanced diagnostics, detailed component-level repair Diagnostic Tools: References to specialized tools and diagnostic procedures specific to Audi vehicles of this era. 📊 Manual Specifications File Format Digital Format Support: Not applicable (Printed) Document Type: Original Equipment Manufacturer (OEM) spec manual Print Quality Paper Quality: High-quality, durable paper stock suitable for workshop environments Binding Type Binding: Professional perfect binding or saddle-stitched for durability and ease of use ⚙️ Engine Specifications Primary Engine Engine Code: NG (2.3E), potentially others like AAH (2.8E) Engine Type: Inline 5-cylinder (2.3L), V6 (2.8L) Displacement: 2.3 Liters (2309 cc) or 2.8 Liters (2771 cc) Performance Horsepower 2.3: Approx. 130 hp @ 5800 rpm Torque 2.3: Approx. 137 lb-ft @ 3400 rpm Horsepower 2.8: Approx. 172 hp @ 5500 rpm Torque 2.8: Approx. 184 lb-ft @ 3500 rpm Fuel System Fuel Delivery: Bosch KE-Jetronic CIS-E (2.3L), Bosch Motronic EFI (2.8L) Fuel Type: Unleaded Gasoline (91 Octane Recommended) Valvetrain Engine Configuration: SOHC (2.3L), DOHC (2.8L) Cooling Cooling System Type: Pressurized liquid cooling system Lubrication Oil Capacity 2.3: Approx. 4.5 Liters (4.8 Quarts) Oil Type 2.3: SAE 10W-30 or 10W-40 (API SG or higher) 🔧 Transmission Standard Transmission Type Std: 5-speed Manual Transaxle Optional Transmission Type Opt: 4-speed Automatic Transaxle (ZF 4HP-18) Features Drivetrain: Permanent Quattro All-Wheel Drive (AWD) Fluid Specifications Manual Transmission Fluid: API GL-4, SAE 75W-90 or 80W-90 Synthetic Gear Oil Automatic Transmission Fluid: G 052 162 A1 (or equivalent ATF) 📐 Dimensions Exterior Wheelbase: Approx. 100.3 inches (2548 mm) Length: Approx. 178.1 inches (4524 mm) Width: Approx. 67.9 inches (1725 mm) Height: Approx. 55.3 inches (1405 mm) Weights Curb Weight Manual: Approx. 3175 lbs (1440 kg) Curb Weight Automatic: Approx. 3285 lbs (1490 kg) 🛡️ Safety Features Ratings NHTSA Front Impact: Not explicitly rated for 1993 models per modern standards, but generally considered robust for its era. Active Features ABS: Standard on most 1993 90 models (Bosch ABS) Passive Features Airbags: Driver-side airbag standard Seatbelts: 3-point front and rear seatbelts Chassis Design: Unitized steel body construction with crumple zones 💡 Technology Features Infotainment Audio System: Factory AM/FM cassette stereo, optional CD player (rare) Driver Assistance ABS: Standard Anti-lock Braking System Connectivity No Modern Connectivity: No provisions for Bluetooth, USB, or other modern connectivity features. 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, depending on driving conditions. Timing Belt Replacement: Every 60,000 miles (96,000 km) or 5 years for 2.3L engine. Manual will detail specific intervals. Spark Plug Replacement: Typically 30,000 miles (48,000 km) for standard plugs. Fluid Specifications Coolant Type: G 12 or G 12+ (Ethylene Glycol based) coolant (check specific manual recommendation) Brake Fluid Type: DOT 3 or DOT 4 Known Issues Common Wear Items: Ignition components (distributor cap, rotor, plugs), fuel injectors (especially CIS-E), front suspension bushings, CV joints, starter motor, door lock actuators. Electrical Gremlins: Can develop due to age, particularly in wiring harnesses and sensor connections. Rust Prone Areas: Wheel arches, rocker panels, around windows, and subframes. 📚 Vehicle History Brand Heritage Audi...