This manual covers the A4 and S4 models produced between 2003 and 2006, belonging to the B6 (8E/8H) generation. These premium compact executive sedans and wagons are renowned for their elegant design, quality interiors, and engaging driving dynamics, often featuring the hallmark Quattro all-wheel-drive system. The S4 variant, in particular, offers enhanced performance with its powerful V8 engine and sport-tuned chassis, competing directly with other luxury performance vehicles of its era. The legacy of engineering excellence and a focus on driver experience are evident throughout these models, making them a sophisticated choice for discerning drivers.

This comprehensive parts manual provides detailed information essential for identifying, ordering, and understanding the components of your A4 or S4. It includes exploded view diagrams, part numbers, and illustrations for all major systems, including the engine, transmission, drivetrain, suspension, steering, brakes, electrical systems, bodywork, and interior. The manual is designed to assist owners, technicians, and mechanics in accurately identifying the correct parts for maintenance, repair, and restoration, ensuring the continued optimal performance and longevity of your vehicle.