This comprehensive parts catalog is your essential guide for maintaining and repairing your 2003-2006 Audi S4. It provides detailed information on a wide range of components, including engine, transmission, body, suspension, steering, brakes, electrical, and more. Whether you're a professional mechanic, a DIY enthusiast, or simply need to know how to find the right part for your vehicle, this catalog will prove invaluable. The catalog features highly detailed illustrations and diagrams, accompanied by clear and concise descriptions of each part. You'll find everything you need to identify components accurately, understand their functions, and order the correct replacements. Moreover, the catalog includes information on labor hours for common repairs, helping you estimate the time required for various tasks. Specific areas covered in this catalog include: * **Engine and Transmission:** Engine mounts, under-cover, air cleaner, exhaust system, cooling system, engine oil cooler, front and rear axles, and more. * **Body and Exterior:** Front and rear bumpers, grille, headlights, windshield, hood, cowl, dash, rocker panels, doors, roof, rear window, wheel, and more. * **Interior:** Seats, seat belts, instrument panel, center console, A/C and ventilation system, and more. * **Electrical System:** Comprehensive coverage of electrical components, excluding wiring diagrams. * **Suspension and Steering:** Front and rear suspension, steering linkage, steering gear, steering wheel, steering column, and more. * **Brakes and Safety:** ABS system, brake components, air bag system, and more. * **Other:** Paint code location, emissions system, cruise control system, underhood dimensions, A/C refrigerant capacities, and more.

The 2003-2006 Audi S4 is a high-performance sedan that embodies the German automaker's commitment to engineering excellence and luxurious design. This generation of the S4 marked a significant shift from its predecessor, introducing a potent 4.2-liter naturally aspirated V8 engine, replacing the previous turbocharged inline-six. This powerplant, paired with Audi's renowned quattro all-wheel drive system, delivered an exhilarating driving experience, propelling the S4 from 0 to 60 mph in just 5.1 seconds. The S4's exterior design remained true to Audi's signature aesthetic, featuring a sleek and aggressive profile with signature grille and sharp lines. Inside, the cabin provided a luxurious and comfortable environment with premium materials and advanced technology features. The S4's reputation as a compelling blend of performance and luxury further cemented its position as a formidable contender in the premium sports sedan segment. Beyond its notable performance, the 2003-2006 S4 offered owners a range of available features that catered to both comfort and practicality. Standard equipment included leather upholstery, heated front seats, a Bose sound system, and a sunroof. Optional upgrades included a navigation system, a premium sound system, and a rearview camera. However, as with any vehicle of its age, sourcing specific parts can be a challenge due to discontinued production, leading to a potential need for aftermarket components. The "2003-2006 AUDI S4 Parts List Catalog" serves as a valuable resource for owners and mechanics seeking to maintain or repair their vehicles. This comprehensive catalog details the specific parts available for various model years, making it easier to identify and obtain the right components to keep the S4 running smoothly and performing at its peak.