TRANS/AIR COMPRESSOR MOUNT KITS, PART NOS. 4012120-01, 4012120-02, AND 4012120-03, MANUFACTURED BETWEEN SEPTEMBER 1, 2002, AND MARCH 3, 2003. THE MOUNTS IN QUESTION ARE ONLY INSTALLED IN 2003 FORD VEHICLES WITH A 7.3L ENGINE. THESE COMPRESSOR MOUNT KITS CONTAIN A BELT GUARD THAT SHOULD NOT BE USED ON A 2003 MODEL YEAR VEHICLE. THERE MAY BE CONTACT BETWEEN THE BELT GUARD AND THE BRAKE LINE. THIS CONTACT, IF SEVERE ENOUGH, COULD RUD THROUGH THE BRAKE LINE RESULTING IN REDUCED BRAKING CAPACITY.