The National Highway Traffic Safety Administration (NHTSA) has opened an investigation involving the Ford Bronco. According to the Office of Disability Investigation (ODI), three petitions were filed in March requesting a disability investigation into suspected valve defects in certain Broncos. The petitions are under ODI numbers 11461178, 11460125, and 11460124.
According to NHTSA documents, 2021 model year Ford Bronco units are involved – all equipped with a 2.7-liter twin-turbo EcoBoost V6 engine. ODI recorded 32 complaints related to this alleged failure.
The NHTSA document problem description reads:
Under normal driving conditions without warning, the vehicle may experience a loss of propulsion without restarting due to a fatal engine failure associated with a faulty valve in the 2.7 L Eco-Boost Engine.
ODI will evaluate the matter and will decide whether to grant or reject the petition.
An active thread Bronco6G has recorded the number of Bronco owners who suffered engine failure. As of May 31, 2022, there are a reported 50 units on the list – some as young as 3 miles away while others have nearly 7,000 miles. Common among all these Broncos is their 2.7 liter EcoBoost V6 engine.
Although not confirmed at this point, reports say that the problem lies with the valves used in the 2.7-liter engine, which is supplied by the vendor. The bad batch of valves is thought to have a defect that causes them to become brittle due to the heat of combustion.
We would like to point out that this is still under investigation and it appears that not all 25,000 2021 Broncos will be affected. It’s not clear if other Ford products equipped with the same EcoBoost engine experience the same problem.
For the record, ODI did not disclose the start date of the investigation involving the Bronco unit.