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Looking for parts gurus! Wiring harness clipped to LF Fender liner on 14 S, can't find replacement

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Changing out the headlight bulb on my 14 S and pulled the fender liner off not realizing there was a small wire attatched to the inside of the fender liner! It's some kind of small, thin, sensor. I thought it was an ambient air temp sensor but that temp reading is still fine. In fact, everything seems fine.

However, have a TPMS warning on the dash now. It could be coincidental with a bad sensor as I can't find any reference to an antenna wiring harness that goes throughout the car, but it sure makes sense. I have the first gen TPMS system. I actually found a picture of the harness online from some junkyard in Russia, but they describe it as a TPMS Loop wire which I can't find referenced anywhere. I'd really appreciate any help!
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