Up for sale is a brand new OEM Ford turbocharger boost / bypass control solenoid valve (BL3Z9K378A). This genuine Ford part is a direct factory replacement for the original solenoid that regulates turbo boost pressure and vacuum control on turbocharged Ford vehicles. Fits vehicles equipped with a turbo engine where this part is specified. It replaces part # AA5Z‑9K378‑A and is built to meet Ford’s OEM standards for fit and performance.