Chekc your tires first, but to reset hold the button down like 10 seconds or until it goes off :thumbup:

 

I do that , but it copmes back on. Isn't there a trick with turning the key to position two and holding the button so it wont keep coming back on?

 

There is no trick to it.

The sensor detects a difference in wheel rotation to determine if a tire has low pressure. Perhaps a crappy balance job or a bent rim maybe throwing the warning.

 

First off goto oc.bmwusa.com and sign up, then goto this link to download a copy of the manual - https://oc.bmwusa.com/oe/ownersmanual.asp?relID=1440682

Only works if you're logged in.

How long between when you reset the light and when it comes back on? Are we talking instantly? Or over some length of time. If it's over some length of time, double check the pressures with a gauge. If you're positive your tire pressures are accurate and theres no leaks then you better bring the car into the dealer. The tire pressure monitor uses the ABS sensors and if it's coming on when it's not supposed to it's hinting there could be a malfunction in the ABS sensors which you obviously don't want.

When I picked up my car the tire pressure sensor light was on, I checked it and my left rear was 5lbs down and right front was up 2lbs. After I fixed it, about 3 weeks later it came on again and the left rear was 5lbs down again. Sure enough I had two leaks in the tire.