A California court announced a lawsuit that targets a “material safety defect” in tens of thousands of Ford’s Mustang Mach-E. 

The vehicles mentioned in the lawsuit all contain electronically latched doors called E-Latch, which Ford markets as a feature. However, the complaint argues they are actually a defect because battery failure or loss of power forces owners to jump-start the vehicle and battery to open the doors from the outside.

A Mach-E does not have traditional door handles or a keyhole on its exterior. Instead, owners can unlock the doors by pressing a button on the door while carrying the vehicle’s key fob or using a connected smartphone.