Thanks again for the addional information, Steve.

Just heard from the dealer--despite my request to return the car with only the sensors replaced, they don't want to release the car tonight. They said they need more time to investigate and will call back later tomorrow.

This may yet turn into an interesting saga. Hope the ending costs less than the original estimate! I'm still inclined to look for a second "expert" opinion somewhere in N. California.

jbors