I imagine if it was still under warranty, and I couldn't fix it myself, they'd just fix it.

But I'd hope they would have been smart enough in the design to protect against a reversed connection given the likelihood of the mistake being made.

Worst case, a fuse should blow.

And that is a user servicable part, and should cost no more then a few dollars to replace.

Fortunately we don't have to throw away our cars whenever something wears out on them, or breaks due to an accident.