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High Voltage Junction Box gen 1 replacement??

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P85+ 2013 does not charge faster than 42kw at a supercharger. AC/DC charging works fine. This happened overnight 2 months ago after a software update. Due to long waiting the car has been to service center recently.

According to Tesla the drop in charge speed has nothing to do with the software update but with slight increase in resistance in HVJB.

Is there anybody with a similar problem that has been fixed by replacing the HVJB. If so I consider replacing it myself with a second hand part instead of paying top dollar....