Proper crankcase ventilation is key to smooth performance and engine longevity. Made from quality materials to resist cracking and brittleness, this PCV hose replaces a worn or leaking original equipment hose. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Audi A4 Quattro: 1996, 1997, 1998, 1999, 2000, 2001] - [Audi A4: 1996, 1997, 1998, 1999, 2000, 2001] - [Volkswagen Passat: 1998, 1999, 2000, 2001]