Thanks Guys for all of the info. I Appreciate it.

The sensor's that are in the wheels now are from Discount Tire and they worked Great. I believe that they are made by Beru.

They easily synched up with the X-Drive and I didn't have one problem with them.

Is there a way to check the model or type of sensors without having the truck or breaking down the wheels?

Who makes BMW's sensor's? I'm pretty sure that they're not made by BMW, but I could be wrong.