Direct or indirect TPMS?

[crolandc]

Hi, I have just got a 2014 F25 X3 and the valve stems are rubber, this is throwing me because I was under the illusion that my car has direct TPMS and that the stem would be metal, do some direct TPMS systems use rubber stems or have I got indirect TPMS? Hope some one can kindly answer this for me. Cheers Cliff.

[crolandc]

Ahh if only, I put my reg down on the TPMS warehouse site and they told me I have 433 MHz sensors, it shows a picture of a Schrader ez 433 sensor and the bloody valve is rubber...oh well....thanks for the replies folks, Cliff.