Sponsored by The Tire Rack

[RBBMWE46M3]

I have had my winter set up on that I bought from the Tire Rack for about 3 months now and I have noticed that now that the weather has been pretty cold my tire warning light goes on almost every time I get into my car for the first time in the morning and when I get back to it after I leave work. I start it up and drive for a second or two and I get the chime and yellow low tire pressure light and it stays on for a minute then goes out and I do not need to reset it. Kind of a pain in the ass. I called my BMW dealer and they told me to go pound some sand when I told them that I had aftermarket wheels and tires on the car. Does anyone else have this problem? I was going to call Tire Rack tomorrow and see if I need to get the tire pressure monitors replaced or whatever...

[nm328xi]

It's the gas law at work...less temperature (from when the TPM was reset originally)...less pressure.

Try resetting when the temperature is cold. Then the pressure has to drop a lot further before the light comes on.

It's happened to me, but not since I reset with the temperature cold.

[nomile]

I typically set the correct pressure, reset and THEN add an additional 1lb/inch^2 to the tires. That has worked for me in Colorado's winters (not like it's actually cold here this year...)

[VMRWheels]

You can also try nitrogen fills, the PSI generally do not very as much as non-nitrogens. You can probably get this done for little or no cost at your nearest Costco