Hello jack, visited the ppa car audio a few days ago.
http://www.ppacaraudio.com.au/index....product_id=488

where I added a tyre pressure monitoring system to my Nissan Patrol, that involves a digital readout on the dashboard with a sensor on each tyre, I will now know what each tire pressure is on each wheel and i will know if i get a tire pressure drop, also will get an audible alarm if the wheel gets too hot.
installation was simple the item screwed on to each valve and the device was automatically programmed.
how good is that
i will enjoy long trips more now with the added feature to my Nissan Patrol.