Hi guys! Just wondering whether anyone has done an RPA retrofit in an '03 4.4i? I believe the RPA is better to go in for rather than the RDC, as the RPA entails the use of a module and uses wheel rotational signals to trigger a fault. Whereas the RDC requires sensors in each wheel well,etc. Do most X5s come with this already installed to detect a "Tire Defect" or does one have to add it? I have not seen a MOD item on x5world and hence was wondering...... Can someone elaborate on this, or provide installation directions/insight on this? Thx in advance!

Hope to hear from you soon.

Regards,

Kris