Used distributor modulator thermal switch for the Mercury Cougar or Ford Mustang equipped with the M code 351C-4V engine and FMX automatic transmission. Originally this switch was mounted in the drivers side door jamb and had a bimetal strip that was calibrated for ambient temperatures between 50 and 58°F. We dont have a way to test these, so they are sold as is.
Ford part # D0AF-12A164-B.