<human>: I recently purchased a product for my car.  It cost me several hundred dollars.  When it arrived, and upon installation, I found something was wrong on it which didn't allow me to properly install everything back to normal condition.  With it being my only vehicle, I had to make it work (the part I was replacing failed, so I had no choice).  This involved me draining some things on my car that will later require me to dig into my own pockets to fix.

The company sends me out a new part, which is correctly built this time.  I install it, dig into my own pockets to get everything into working order again, and it ends up costing me about a hundred or so more than it should have, plus the several extra hours I had to put into this.

The company sent a return shipping label with the new part to send the "bad" one back.  Here's the delimma.

This "bad" part is fixable, by a friend of mine, which could be done for about $10 (I couldn't drive down to him to have it fixed at the time, my only car, remember? So I had no transportation).  But now that it's no longer in my car, I can drive it to him to get it fixed.

I want to do this, and sell it to recoup some of the losses this company caused me out of my own pocket for their mistake.  This was about a month or two ago, and they haven't contacted me again requesting me to send it back/asking if I sent it back.

Am I in the wrong here, and would you consider it stealing?  Or am I right for wanting to recoup my losses for their screw up?

Condense the text into a few key points
<bot>: friend says I'm stealing for not returning a car part that was replaced, I say I should sell it to recoup financial losses the company's screw up caused me.