TPM INSIDE - RESET TPM Stem caps

[paribest]

Hi All,
My 2009 328i new car and somebody stole of the tire valve stem caps. The caps were written "TPM INSIDE - RESET TPM".
1.) Where can I buy these caps online or is it ok to buy caps which I find on eBay.
2.) Will it affect the run flat tpms system if I buy the ones on eBay.
Thanks

[Pitch Black]

gGet them from the parts dept for a dollar each.

[325Ci2004]

you can use any non-metal caps. The TPMI sensors use the valve stem as the antenna. Use of metal caps will possibly interfere with the system.

[paribest]

thank you guys for helping out

[paribest]

Thanks guys for helping out. I got a bunch of them for about $1 from the dealer.

[raceyBMW]

As said above, do not use metal caps. Its not that they interfere, but they can fuse to the metal valve stem due to galvanic corrosion.