How do you turn off BMW X3 tire pressure light?

Answer 1

Inflate the tires to the recommended pressure, this information is located on the driver side door jam when you open the door. Put the car in park. Turn the key to the on position. Hold down the tire pressure button (exclamation point (!) with tire tread under it) for 10 seconds then release. The indicator light will turn off.

The pressure can be set to any pressure you would like depending on altitude and temps but it is recommended you use the factory specs on the door.

I have a 2006 BMW 330xi. It does not have the iDrive Navigation system. To fix this problem make sure you have the correct pressure in all 4 tires, and your spare if you have one. Then on your control stick (on the left hand side) flick the switch up until you see the (!) icon. Hit the button on the end of the stick and an arrow will appear saying reset. Hit the button again, this time holding it in and then you'll see it say reset.