Replace your worn engine intake air duct with this genuine Audi OEM part, number 077129643A, specifically designed for the left rear position in 1997-1999 Audi A8 and A8 Quattro models equipped with 3.7L or 4.2L engines. This factory-original air inlet duct plays a crucial role in maintaining optimal air flow to your engine, ensuring efficient performance and improved fuel economy. Common issues such as cracks, leaks, or blockages can severely affect engine airflow and overall vehicle operation, making this replacement essential for restoring your vehicle's performance. Trust in this authentic part from salvage sources to keep your luxury sedan running at peak efficiency. Compatible with alternative part numbers: N0245076, 4D0614177F.