NHTSA Complaint #11523572 — 2021 FORD F-150

Drivers side and passenger side rear axle end bolt. I called my local FORD dealer and was told that the truck in not safe to drive and to call Roadside Assistance and have my vehicle transported to the nearest FORD dealer for repair. This is somewhat of a common problem as reported on the F150 vehicle user groups and this is the second time that it has happened on this vehicle. My local FORD dealer replaced the passenger side axle when this happened the first time. The only warning of this failure is a rattle during vehicle low speed operation due to centripetal force not allowing the bolt and washer to rattle in the cavity covered by the Logo axle cover. I was only able to notice this rattle due to it being on the drivers side during low speeds. When this occurred on the passenger side I did not notice it and I'm not sure how long the issue existed until my trucks drivetrain disengaged while driving in a parking lot. The bolt failure over time can allow the rear axle to slip outboard and disengage the axle splines. FORD needs to address this issue and determine root cause and resolve this issue.