[capri]

Hi guys

am buying a new set of Alufelgen rims and was wondering about the tire pressure monitor sensor and stem valves.
My car registration says that my BMW 135i is a 2011; but based on the VIN code it was build on 5/2010.

On tire rack, when buying wheels it will ask whether the car was built before 9/2010 or after 9/2010.

In short, are there two different type of sensors ??

Does a new rim also come with a stem valve or this is an optional item ??

Does a TPMS work with any rims specified for BMW ?

is there also different brands for TPMS that has compatibility issues from one rim manufacturer to the other ?
Last but not least, where is the cheapest place to source the TPMS and the stem valve ?


Thanks for the help.
Capri