NHTSA Opens Investigation into 2021 Bronco Engine Failures

The National Highway Traffic Safety Administration (NHTSA) has opened an investigation into reports of “catastrophic engine failures” in V6-powered variants of the 2021 Ford Bronco, Autoblog has reported.

The issue could impact over 25,000 vehicles, the report said.

The NHTSA met with Ford representatives and learned that the engine failure is due to a valve keeper-related problem, according to Autoblog. The keeper doesn’t hold the retainer in place, which allows the valve spring to come loose and causes the valve to come in contact with the piston.

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A.J. Hecht

A.J. Hecht is the managing editor of THE SHOP and host of the In Gear with THE SHOP podcast. Have an idea, a tip, or a question you’d like to see answered? Contact A.J. at

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