Ongoing problem originally reported 4/12/18, NHTSA ID 11084859. Originally reported failure of one aluminum wheel/valve stem causing loss of air pressure. Since then, all four outer aluminum wheels/valve stems have been subject to ongoing air loss. Ford has replaced all the valve stems because of air loss/leaking 3 times! They have also replaced all four outer aluminum wheels because of air loss/leaking. Truck is out of warranty now and I have had an independent tire seal leaking valve stems on multiple occasions and add air to tires frequently because of this ongoing SAFETY PROBLEM.

- Cornwall, VT, USA

The contact owns a 2018 Ford F-350. The contact stated that while driving 60-65 MPH, the TPMS warning light illuminated. The contact stated that air was added; however, the failure reoccurred shortly after. The contact became aware that the TPMS warning light would frequently illuminate shortly after adding air to the tires. The vehicle was taken to an independent mechanic who diagnosed that there was corrosion between the rim and the valve stem, and that the valve stem was no longer sealed. The independent mechanic replaced the metallic valve stem with a rubber valve stem; however, the failure had been reoccurring on 5 of the 6 rims. The manufacturer was notified of the failure and referred the contact to the dealer. The vehicle was taken to the dealer who informed the contact that they did not have the equipment to repair the vehicle. The contact notified a second dealer; San Tan Ford (1429 E Motorplex Loop, Gilbert, AZ 85297) who informed the contact that the vehicle would be repaired at his own expense. An appointment was scheduled. The vehicle was not repaired. The failure mileage was approximately 35,800.

- Mesa, AZ, USA