How do I check the Secondary Brake Pressure Sensor located on the Brake Booster? on 2005 Ford Explorer Sport Trac

Where can I purchase one?
Two local FORD DEALER can not find a part number for it.

1 answer 1 comment
wow thats strange. try napa they might be able to locate one or call ford head quarters
usually if their is no part number if doesn't exist at least not anymore