mesh

Hi,

I have activated RPA, but don't understand what its function is ?

Does it mean that I never need to check my tyre pressure manually as the RPA will tell me when/if I loose some pressure?
Or
Is it there to tell me that I have a flat in my Run Flats?

Thanks in advance.

colejl

It only tells you if you've got a puncture. You still need to check the pressures regularly as normal.

It works via the ABS sensors in the wheel. When a wheel loses pressure it actually starts to spin slightly faster and the electronics can calculate when the difference is enough to alarm you...

fantomas

I read in TIS that the RPA will warn you if the pressure drops by more than 30% of the reference. That is the difference of spinning speed between wheels becomes significant at this point.