🏷️ Basic Information Identification Make: Audi Model: A4 S4 Production Years Covered: 2003, 2004, 2005, 2006 Codes Chassis Code: B6 Engine Codes Common: APDB, BBK 👋 Introduction Market Position Vehicle Segment: Compact Executive Sedan/Wagon Performance Variant: S4 signifies the high-performance variant of the A4 line. Competitive Analysis Key Competitors: BMW 3 Series (E46/E90), Mercedes-Benz C-Class (W203/W204) Key Features Manual Advantage 1: Low price and instant access. Manual Advantage 2: Comprehensive parts listings for accurate repairs. Manual Advantage 3: Original manufacturer data quality. 📋 Manual Details Coverage Areas Manual Type: Parts Catalog / Parts Manual Language: English File Format: PDF Compatibility: All Versions of Windows & Mac Delivery Method: Instant Download 📖 Manual Coverage Systems Covered Powertrain: Engine components, fuel system, cooling system, exhaust system, engine management Drivetrain: Transmission (manual/automatic), clutch, driveshafts, differential, axles Suspension Steering: Front and rear suspension components, steering rack, steering column, power steering system Braking System: Brake discs, calipers, pads, brake lines, ABS components, parking brake Wheels Tires: Wheel assemblies, tire specifications, bolt patterns Electrical System: Wiring diagrams (implied by parts), lights, sensors, ECUs, battery, starter, alternator Body And Exterior: Body panels, bumpers, doors, windows, mirrors, trim, lighting units Interior: Seating, dashboard components, interior trim, airbags (component identification) Procedures Included Part Identification: Detailed listings and diagrams of all original Audi parts Part Number Lookup: Essential for accurate ordering of replacement parts Component Assembly Diagrams: Exploded views showing how parts fit together Ordering Information: Guidelines for requesting parts with full item description and part number Technical Depth Depth Level: Component-level identification and listing for repair and replacement purposes Application Scope: Covers all factory-fitted parts for the specified Audi A4 S4 generation 📊 Manual Specifications File Format PDF Quality: Implied High Quality (Original Manufacturer Book Data) Searchable Text: Likely, depending on PDF creation method, but not explicitly guaranteed. Print Quality Printability: Printable, but may require unzipping for larger files. Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper Type: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type S4: 4.2L V8 FSI (Naturally Aspirated) Performance Horsepower S4: 340 hp @ 7000 rpm Torque S4: 317 lb-ft (430 Nm) @ 3500 rpm Fuel System Fuel Delivery: Fuel Injection (FSI - Fuel Stratified Injection) Engine Layout Cylinders S4: 8 Displacement S4: 4163 cc Engine Code Example: BBK 🔧 Transmission Standard Transmission Type S4 Standard: 6-Speed Manual Optional Transmission Type S4 Optional: 6-Speed Tiptronic Automatic Features Drivetrain: Quattro Permanent All-Wheel Drive 📐 Dimensions Exterior Length Sedan: Approx. 4581 mm (180.4 in) Width Sedan: Approx. 1766 mm (69.5 in) Height Sedan: Approx. 1418 mm (55.8 in) Wheelbase Sedan: Approx. 2650 mm (104.3 in) Weights Curb Weight S4 Manual: Approx. 1695 kg (3737 lbs) Curb Weight S4 Auto: Approx. 1730 kg (3814 lbs) 🛡️ Safety Features Ratings NHTSA Driver Front 2004: 5-Star NHTSA Passenger Front 2004: 5-Star IIHS Frontal Offset 2004: Good Active Features ABS: Standard Esc: Electronic Stability Control (ESP) Traction Control: Traction Control System (ASR) Passive Features Airbags Front: Dual Front Airbags Airbags Side: Front Side Airbags Airbags Curtain: Optional Sideguard Curtain Airbags 💡 Technology Features Infotainment Infotainment System: Audi Symphony or Concert audio systems; optional navigation (MMI system introduced later in the generation for some models/facelifts). Driver Assistance Parking Assistance: Optional Parking Sensors (front and rear). Cruise Control: Standard cruise control. Connectivity Connectivity Options: Optional CD changer, optional satellite radio preparation, optional Bluetooth hands-free phone preparation. 🔧 Maintenance Service Intervals Oil Change Interval Typical: Every 10,000 miles or 1 year (check owner's manual for specific details) Major Service Interval Typical: Refer to Audi service schedule, typically around 30,000, 60,000, 90,000 miles for inspections and replacements (e.g., spark plugs, filters, timing belt if applicable - though V8 uses a chain). Fluid Specifications Engine Oil Type: SAE 0W-40 (fully synthetic, meeting VW 502 00 / 505 00 specifications) Coolant Type: G12 Plus (or compatible ethylene glycol-based coolant with pink/red color) Brake Fluid Type: DOT 4 Transmission Fluid Manual: GL-4 or GL-5 gear oil (specific viscosity required, e.g., 75W-90) Transmission Fluid Automatic: Audi-specific ATF fluid (e.g., G 052 162 A2 for Tiptronic) Known Issues Common Issue Ignition: Coil pack failure, spark plug issues. Common Issue Oil Leaks: Valve cover gaskets, oil pan gaskets, oil cooler seals. Common Issue Suspension: Control arm bushings, ball joints, tie rod ends (wear items). Common Issue Exhaust: Exhaust manifold cracks (on some V8 applications). Common Issue Timing System: Timing chain tensioners and guides (can be a significant repair on V8 models). 📚 Vehicle History Brand Heritage Brand Heritage: Audi AG, a German automobile manufacturer with a long history of producing premium vehicles. Model Evolution Generation Name: B6 Generation (Typ 8E/8H) S4 Introduction Era: The S4 designation has a long lineage within Audi, evolving through multiple generations to represent the sportiest iteration of the A4. Production Manufacturing Location: Ingolstadt, Germany 🏆 Awards & Recognition Recognitions Car And...