[champignon]

Tire Rack told me that there was no further investigation that they could have me do (following rather extensive instructions already sent to me for self-testing). They told me to go to the dealer have them check it out, which hopefully will be covered under the warranty. Tire Rack said that most or all of their tire testing is done with BMWs, that they have a really good relationship with their local BMW dealer in Indiana, so it isn't like they aren't familiar with the cars, but the absence of any localizing information as to which tire, etc., just an overall Tire Sensor malfunction, made further troubleshooting on their end impossible.

I have run out of time, in fact I'm in France now, so can't deal with this until my return the middle of October. I have an appointment scheduled at the dealer then to sort this out (hopefully).