Aftermarket wheels questions
 

Hey everyone, i own a 2005 2.5 x3 im planning to get a new set of wheels for the summer .My question is do i need to get tpms valves and if yes were do i get them and any ideas on how much they are. Also any wheels recommendations would be great . Thanks

You don't need anything special for your flat tire monitor, as it functions by comparing the rotating speed of any wheel with another wheel on the same axle. It doesn't measure pressure.

Can't help with aftermarket wheels, I use OE.

tpms
 

So any tpms would work ? it doesnt have to be oem ?

I wasn't aware that you had any TPMS sensors on a 2005 X3. I thought you had a Flat Tire Monitor (FTM) that monitored pressure by measuring rotational speed of the wheels, as per the owner's manual posted on this site. BMW did use different systems in different markets.

whats the best way to find out what i have?

There are two types of TPMS sensors. One is attached to the inside of the valve stem, and the other is attached to the centre of the rim, inside the tire, by a band. The only sure way to detect the latter, and the best way to detect the former, is by demounting the tire.

Why do you believe you have TPMS sensors?