If the stems are programmed to each car, how will the vehicle handle it if I buy wheels and tires for winter use? My dealer said I could order more valve stems for the new wheels at $45.00 each. OK, but will they work out of the box, or is there some programming function to be done for the new stems? He didn't say, and I never though to ask.

And will I have to do something in the spring when I change back the other wheels?

Thanks for any info you can give.