i just got 2 new rear tires, same size as the stock OEMs up front only different brand and NON run flat option on them. i got about 7 miles from the tire place and the TPMS light goes off. anyone to speculate why?

 

check your pressures all the way around and reset the system

your 06 TPMS is based on the rotational speed of the wheels and any significant change can cause it to alert....reset it and let it learn your new "normal"

(how 2 is in the owner's manual)

 

You have an '06 with the indirect system? If so, could be the tire diameter is a little different and your system detected it. Reset the system and see what happens.

 

how do i reset the system the manual is really vague about this

 

With the car idling and at a stand still, push the tpms button located down by the parking brake handle until you see the light illuminate then release. The light should extinguish when you drive off. Anyway this is what works on our MCS when I either rotate or service the tires. Good luck.

 

How-to videos
Scroll down to indicators and click on TPMS with or without NAV

 

Watch out Stimpy. He's got an R53. You might get yelled at. I learned the hard way.

 

Oops! I figured resetting TPMS would be similar for an R53.

 

Sometimes I've needed to press the button as buzzsaw described. At other times, the software figured it out after a few miles all by itself.

My guess is that the button is there to force the software to accept the currently installed tire sizes when they're not within the expected range.