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My car is out of warranty -- and I'd prefer somebody who was looking out for my interests rather than just replacing all the expensive parts. Then again, I might be able to get what I need done with mobile Tesla service if I'm careful about how I ask for it.
I've had good work done down in Costa Mesa at EVFixMe, but I'm in the same boat of wishing there were an independent specialist in LA. Was very disappointed when I found out the shop down the street from me called Electric Ave really just specializes in hybrids.