What can we do about his car loan, etc.?

My husband bought a used 2022 Ford Bronco last year through a major dealership in our area (financed it and has a payment of about $450 a month. ) He received a recall notice about something related to the engine at around the same time the car was giving him trouble in that same area. Turned it in and they've had it for about a month. He heard today that they're "rejecting the repair, " and in order to fix it, feel need to pay over $10,000. What can we do? No way we're paying that much to repair this vehicle as that just seems absurd.