Noticed today under the drivers side door above the black skirting the metal has been pushed in.

No idea how this could have happened as there is no scratch, paint transfer or damaged from say a tow bar or bumper bar. My only guess is some one has kicked it in. Why... I don't know.

Is this a relatively easy repair or am I up for some big bucks?

Also what is the exact terminology for this particular part of the car?

Any help appreciated.

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