The 2024 Ford Mustang’s first recall is a doozy, as the owners of the 66 vehicles potentially affected by a production error are being urgently warned not to drive them. The issue stems from a brake pedal that could become loose.

Ford first started looking into this issue on November 8, after receiving a report about a problematic pedal from a dealer who was conducting a pre-delivery inspection. The dealership notified the automaker, which turned to the team at the Flat Rock Assembly Plant for help investigating the issue.

They traced the issue back to the supplier, Ventramex, and using production records, discovered that the pivot tubes in a total of 69 brake pedal assemblies may not have been properly flared.

Read: 2020-2023 Ford Mustangs Will Not Alert Drivers When Brake Fluid Runs Low

 2024 Mustang Hit With First Recall, 66 Owners Urged To Stop Driving

That could cause the part to become unseated, which could then lead to the brake pedal becoming loose. That’s dangerous because a driver might not be able to slow down or stop when they need to. It is not clear if this issue affects Mustangs equipped with the automatic, manual, or both transmissions.

Interestingly, in documents filed with the National Highway Traffic Administration (NHTSA), Ford writes that the Ventramex actually caught the suspect parts and quarantined them. However, for reasons that have not been made clear, the pedals were sent out to the automaker in error.

Ford knows for sure that 32 Mustangs with rejected pedals were shipped to customers. It writes that another 34 were installed in vehicles whose pedals were replaced at the factory for having a squeak or a rattle. However, it cannot officially trace the pedals in these vehicles, so it is recalling all 66.

Ford says it is reaching out to owners to tell them not to drive their vehicles, but if you have a 2024 Mustang and want to ensure that it’s drivable, you can check your VIN on NHTSA’s website to see if yours is one of the vehicles included in this recall.

For owners who do own one of the cars with a loose brake pedal, Ford will tow their vehicle back to the dealer, where the brake pedal and bracket assembly will be replaced for free.

 2024 Mustang Hit With First Recall, 66 Owners Urged To Stop Driving