Vacuum check valve to connecting pipe.

A bad PCV breather hose can not only make a mess in your engine bay spraying oil everywhere, it can have a negative impact on your engine's performance and fuel economy. A genuine Audi part, this will be a direct replacement on 1.8T motors.

A bad PCV breather hose can not only make a mess in your engine bay spraying oil everywhere, it can have a negative impact on your engine's performance and fuel economy. This updated design has a reinforced gusset to last longer than the original stock...