The Ford Bronco might be one of the hottest off-roaders at the moment, with demand far exceeding supply. But it seems you might want to rethink your order if you have one coming with the 2.7-liter EcoBoost engine.

A thread concerning the 310-hp 2.7-liter twin-turbo V6 Ecoboost powertrain blowing up first appeared on December 29, 2021. One blown engine is not a cause for concern, as there could be various reasons. But as of April 22, there are reports from 46 different Bronco owners, all complaining about the same engine.

The Bronco6G forum now has a comprehensive list of failures, including the average mileage at which the engines fail. Rather worryingly, most of the problems are related to dropping a valve, which appears to happen at less than 10,000 miles.

Thankfully, for the owners, this means the failure is still within Ford's warranty period. Ford covers the Bronco with a basic three-year/36,000-mile warranty, a five-year corrosion warranty, a five-year/60,000-mile powertrain warranty, roadside assistance for five years, or 60,000 miles.

"We are aware of a select number of engines with this concern, and we are investigating. If any customers are experiencing issues, they will be covered under the vehicle's 5-year, 60,000-mile powertrain warranty," Ford said to The Drive.

It seems like Ford is aware of the problem and is likely investigating it. This will result in issuing either a recall or a technical service bulletin.

According to the forum, these problems are only related to the second-generation 2.7-liter EcoBoost and not the engines used in Lincolns and other Ford models.

Apparently, the problem stems from a bad batch of valves Ford received from a third-party supplier. A now-deleted account owned by somebody claiming to work at Ford's plant said that the bad batch contained valves with a metal composition that goes brittle due to engine heat. Most of these models were made in April 2021.

The information on the forum does not align with that, however. The failures span from May 2021 to October 2021, and during that time, Ford sold 20,000 Broncos. However, it's not clear how many were 2.7 EcoBoost models.

The Bronco6G forum is currently asking owners to file complaints with the NHTSA so it can better track the problem and possibly force Ford to do a proper investigation.