Wastegate frequency control valve that controls the amount of boost pressure.

Also known as "N75 valve", "boost pressure valve" or "vacuum solenoid valve".

fits:

1997-2006 Audi A4 1.8T

1998-2004 Audi A6 1.8T

2000-2006 Audi TT 1.8T

2000-2006 Volkswagen Golf Mk4 1.8T

2000-2005 Volkswagen Jetta Mk4 1.8T

1999-2005 Volkswagen New Beetle 1.8T

1998-2005 Volkswagen Passat B5 1.8T