🏷️ Basic Information Identification Make: Audi Model: S4 Year: 1994 Product Type: Service & Repair Manual Software Codes Chassis Code: B4 👋 Introduction Market Position Segment: Performance Sedan Positioning: The 1994 Audi S4 (B4 chassis) represented a significant step in Audi's performance offerings, building on the success of the previous 'S' models. It was positioned as a capable, all-weather performance sedan with a focus on comfort and executive appeal, competing against vehicles like the BMW M3 (E36) and Mercedes-Benz 2.3-16 Cosworth. Competitive Analysis Competitors: BMW M3 (E36), Mercedes-Benz 190E 2.3-16/2.5-16, Subaru SVX (though different class). Key Features Performance Focus: Turbocharged engine, quattro AWD, sport-tuned suspension, potent braking system. Practicality: Four-door sedan body style offering practicality for daily use. Dvantage Of Software: Instant access, searchable, multi-device compatibility, cost-effective compared to outdated print manuals. 📋 Manual Details Coverage Areas Primary Coverage: 1994 Audi S4 Page Count Estimated Pages: Extensive (Digital Format - Full Year Access) Manual Type Type: Factory-Derived Online Service and Repair Manual Language Language: English Format Format: Online Software/Web-Based Access 📖 Manual Coverage Systems Covered Engine: Full engine diagnostics, repair, and overhaul for the 2.2L Turbocharged inline-5 engine. Drivetrain: Manual transmission, clutch assembly, quattro all-wheel-drive system (center differential, rear differential), driveshafts, axles. Brakes: Front and rear brake systems (discs, calipers, pads, lines), ABS system diagnostics and repair. Suspension: Front and rear suspension components (struts, shocks, control arms, bushings, ball joints), alignment specifications. Steering: Power steering system (pump, rack, lines), steering column, wheel alignment. Electrical: Complete wiring diagrams, fuse box layouts, starter system, charging system, ignition system, lighting, instrument cluster, comfort electronics. Heating Ac: Climate control system, A/C compressor, refrigerant system, heater core, blower motor. Body: Exterior body panels, doors, windows, sunroof, bumpers, interior trim, seat adjustments. Fuel System: Fuel pump, fuel injectors, fuel pressure regulator, fuel filter, fuel tank. Cooling System: Radiator, water pump, thermostat, coolant hoses, cooling fan. Procedures Included Maintenance: Oil and filter changes, spark plug replacement, air filter replacement, fuel filter replacement, coolant flushes, brake fluid changes. Troubleshooting: Diagnostic procedures for common faults, error code interpretation (where applicable), step-by-step troubleshooting guides. Repair: Detailed step-by-step repair instructions for all major components and systems. Diagnostics: Engine management system diagnostics, ABS system diagnostics, climate control diagnostics. Technical Depth Depth: Comprehensive, from basic scheduled maintenance to complete engine and transmission rebuilds. Diagnostic Capability: Advanced diagnostic procedures including testing of sensors, actuators, and control modules. Rebuild Procedures: Detailed instructions and specifications for engine, transmission, and differential rebuilds. 📊 Manual Specifications File Format Format Details: Web-based access, compatible with PC, laptop, smartphone, tablet browsers. Requires internet connection. Print Quality Quality: N/A (Digital content optimized for screen viewing) Binding Type Binding: N/A (Digital content) Paper Type Paper: N/A (Digital content) ⚙️ Engine Specifications Primary Engine Engine Code: ABY Configuration: 2.2L (2226cc) DOHC Inline 5-cylinder, turbocharged, intercooled Bore X Stroke: 81.0 mm x 86.4 mm Compression Ratio: 9.0:1 Performance Horsepower: 227 hp @ 5900 rpm Torque: 243 lb-ft @ 3000 rpm Fuel System Induction: Bosch Motronic electronic fuel injection with turbocharger and intercooler Fuel Type: Unleaded Premium (91+ Octane) Cooling System Cooling Capacity: Approx. 7.5 liters (with heater core) Coolant Type: G12 (Purple) or G11 (Blue) ethylene glycol-based coolant 🔧 Transmission Standard Transmission Type: 6-speed Manual Optional Transmission Type: N/A (Manual only for S4) Features Drivetrain Layout: Permanent All-Wheel Drive (quattro) Transfer Case: Torsen Center Differential (automatic torque biasing) Fluid Specs Manual Transmission Fluid: API GL-4 or GL-5, SAE 75W-90 synthetic gear oil (Check manual for specific Audi specs) Fluid Capacity Manual Transmission Capacity: Approx. 2.1 liters 📐 Dimensions Exterior Length: 4518 mm (177.9 in) Width: 1739 mm (68.5 in) Height: 1384 mm (54.5 in) Wheelbase: 2610 mm (102.8 in) Weights Curb Weight: Approx. 1580 kg (3483 lbs) 🛡️ Safety Features Ratings Safety Standards: Reflects early 1990s US Federal Motor Vehicle Safety Standards (FMVSS). Active Features ABS: Anti-lock Braking System (ABS) standard. AWD: quattro permanent all-wheel-drive system for enhanced traction and stability. Passive Features Airbags: Driver's side airbag. Seatbelts: Three-point inertia-reel seatbelts with pre-tensioners. Rollover Protection: Reinforced body structure, A-pillar design. 💡 Technology Features Infotainment Audio System: Factory AM/FM cassette stereo with optional CD changer. Sound quality typically reflects its era. Driver Assistance ABS: Standard Anti-lock Braking System. AWD: quattro permanent all-wheel drive provides significant stability and traction. Connectivity Connectivity Features: Basic, no integrated Bluetooth or modern connectivity features. Requires aftermarket solutions. 🔧 Maintenance Service Intervals Oil Change: Every 5,000-7,500 miles (or 6-12 months, whichever comes first) using synthetic oil. Spark Plugs: Check and replace at 30,000-60,000 mile intervals, depending on plug type and condition. Timing Belt: Crucial: Replace every 60,000 miles or 5 years due to interference engine design. This is a critical maintenance item often overlooked, and failure leads to catastrophic engine damage. Coolant Flush: Every 2-3 years or 30,000 miles. Brake Fluid Change: Every 2 years. Fluid Specifications Engine Oil: Fully Synthetic...