Genuine VAG Diverter Valve for TFSI and TSI - Revision GReplace your tired and worn diverter valve, commonly known for leaking from the diaphragm which releases the boost produced from the turbo. Boost pressure should always be contained it unless told otherwise by the ECU. Boost leaks = loss of power. This is the latest revision of the Genuine VAG part, fully plug and play with no adaptions required. Simply fit and forget, and enjoy the power with peace of mind that it's the very latest version available.