Tyre Icon on Dash

[guest2360]

Has anybody had the tyre Icon come up on the dash but the tyre pressures are OK.  This is on a 2008 RT. Think there are batteries in the sensors so after 8 yrs this might be the reason.

[Chad]

Batteries in the sensors? My understanding is that TPMS works through the ABS sensors. (The sensors monitor the revolutions of each wheel which in turn is monitored by the computer. A drop in tyre pressure results in that particular wheel rotating slighty more frequently than the other and thus calculated by the computer as a reduced tire pressure). I would guess therefore that the ABS sensor is on its way out.

[guest2360]

No nothing to do with the ABS. The sensors are in the rims held in place by the valve stem.  I'm pretty sure there is a battery in each one but have no idea of their life. They talk to the reader which is in the alarm unit.

[David.]

BMW R1200RT Tire Pressure Monitor Battery Replacement, https://www.youtube.com/watch?v=Mpjz0cDjnK4

Page 42 of this Rider's Manual http://www.kali.hu/motor/bmw-r1200rt/le ... l_2008.pdf, suggests a "Battery Symbol" should appear if the Battery is weak.

Looks & sounds like after 7 years, the Battery could well need replacing, http://forums.bmwmoa.org/showthread.php ... or-Battery.

This video is for a car, but must be similar on a bike, https://www.youtube.com/watch?v=Y04gARDiZx4.

RealOEM doesn't list replacement batteries, new sensors sound expensive, http://www.realoem.com/bmw/partgrp.do?m ... g=36&fg=23,
think I'll stick to my Halfords tyre pressure gauge £5.99, http://www.halfords.com/motoring-travel ... sure-gauge