DeepBlueMN
2019 AWD Model 3
Wow, that seems excessive on their part…Thanks for the nudge. I might do it since we have a drive up that direction coming this weekend.
For the record, here is what the service guy said "I can set it up for you to purchase that part, but I will tell you, that there is more to it than that single part. It would also require a change of the vehicle’s configurations with our internal system, and no Tesla service center would update the configuration for you on that. Also, if we note that you have performed unauthorized work on the HV system (of which the charging ECU is a part of), this would void the warranty on any components affected through the upgrade."
You are simply replacing one certified Tesla part with another Tesla certified part. No third party product is involved in your case. Plus, the ECU is not even “directly” part of the High Voltage wiring. And, no reconfiguration by Tesla is needed; the car auto-detects the new part during the software re-flash/reinstall process.
I had simply walked into Tesla Rogers with the needed part # on a post-it note. They didn't even ask me any questions. (Legal “Right-to-repair” in my opinion.) Theoretically, if there was any issue, I could simply put the old ECU back in and re-flash.
That said, doing your own ”electrical work“ in a $50k car can be a little “cross your fingers”.
Good luck!