From post #11 of this thread....
I did go the "QC Charge" route.
Excellent shop and excellent communication. Their customers (including me) are naturally on edge due to getting a large car repair bill.
They handled it professionally.
The QC Charge shop is a victim of their own success - they are too busy.
It was a four month turnaround for my car, not from bad work, just too busy, due to the volume of cars running thru their shop.
It was a trying time not having a car for four months.
My cost was $5,500.
Five months later, no issues, and a dry speed sensor.
In my opinion, if you are faced with this DU failure in your car, getting another Tesla DU is not fixing the problem. The stock DU has a design flaw, so "third party rebuild" to fix the design flaw was my only option.