First, you need to realize that there is a possibility that there is
from the accident that no one saw because it was hidden and everything
visible looked okay. It's possible (although not likely) that something
was moved a little out of position and over time, rubbing has caused a
If this appears to be the case, contact your insurance company (or the
company that paid for the repairs to your vehicle).
If the shop makes the claim that the problem is actually caused by the
accident, they should be able to show you the evidence they have that
is the case.
If the shop refuses to make a warranty repair on anything you think
be covered by your warranty, call Hyundai customer assistance. The
will be in your owner's materials.