Ford Motor Co has recalled almost 50,000 of its top-of-the-range electric sports cars due to worries over a potential loss of power when driving.
Fast charging and repeated rapid acceleration can cause the high-voltage battery main contactors to overheat, said the car maker.
Ford said the Mustang Mach-E vehicles will be upgraded with new software with installations to start next month.
Deliveries of new vehicles have also been halted until the bug is fixed.
Ford said: "Overheating may lead to arcing and deformation of the electrical contact surfaces, which can result in a contactor that remains open or a contactor that welds closed."
Mustang Mach-E vehicles have been recalled five times already by Ford for unintended acceleration, loose bolts and windshield and roof glass repairs.
The recall comes as questions are being asked over the whole economics of the EV market given the surge in the price of lithium and other battery metals.
Other key metals including cobalt and nickel have also soared pushing the cost of batteries up for the first time in years and the prices of cars with them as they account for around half of the cost.
Electric car makers are already battling with shortages of semiconductors and other parts due to supply chain issues.