is there any difference in the valve core used with a tire pressure monitor on a wheel as opposed to a regular valve stem ?
i got a used wheel for my sister's car, and it has the TPM unit on the wheel, but no valve core.
this is my first experience with these sensors.
TIA as always.

Im 99% sure same core

But, if in doubt,
pull the TPM sensor and install a typical rubber valve stem

I don't believe that they are the same, but will fit and work. Because of the potential corrosion, I always put a dab of oil on the threads both inside and outside of the stem. That is if the stem is the screw-on style.

I thought I read that they used a nickel plated core.

I believe it is something like that. The design of the core is the same, but the TPMS cores are of a different material to supposedly reduce corrosion. We have interchanged them for years with just a drop of oil and have never had any problems.

We have seen far more problems with the nut seizing on the stem so that always gets a drop of oil too when we assemble them.

Anyone know ANY WAY to eliminate these pesky things ? On my 05 they will light up on a slight outside temp change. THEY ARE WAY TOO SENSITIVE.

thanks guys ! great to know a standard core will work ! i'll be sure to oil up the threads as suggested.

stoopid doughnut spare........

That TPM did save my butt about a month ago ..... a guy across the way pulled apart some pallets and didn’t pick up all the staples. One of them nailed me and that system benefited me then ... but I would have caught it anyways later

Well.................................Some people take them out of their tires and put them into their spare and just put the spare to 40# or so. Kinda eliminates the spare's usefulness unless you drill holes in the spare so that you can actually mount the monitors.

And then there's this; https://www.1addicts.com/forums/showthread.php?t=207651