The next thing she knows, Sam is there with jury-rigged repairs, and someone she's seen before who thinks she's dying. She isn't sure he's wrong. But Sam's just as determined to repair her as he has ever been to repair Dean, even if he does throw the broken reading-box at her when the other one answers his question. She doesn't mind. Better he hurt herand he aimed for a part of her frame that's too bent to try to salvagethan hurt John the way he's saying he wants to.
When she sees Dean again, his chassis and carburetor and fuel lines are in perfect working order, but his spark plugs aren't always firing and his brake line is in danger of snapping. He spends several days doing hardly anything but taking her apart, sorting the usable parts from the scrap, and putting her back together again. She's glad, even when he comes back from a trip he never should have gone on and bashes her trunk inwhen he drops the crowbar, one of his spark plugs is firing better than it was before he picked it up. Her parts can be replaced. His parts can't be, and no one should be on the road in the condition Dean's in.