An overview of the TPMS low pressure warning system for Lexus RX350, and how to understand it.

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According to my local Lexus dealer, if your tire light comes on you should not try to reset it because it is self-resetting once the problem and trigger is fixed. Resetting can overwrite proper thresholds and info saved by the dealership in your tire monitoring system. Watch video to determine why your light is coming on. Vehicle shown is a 2007 RX350 and this 2nd generation covers 2003-2008. Your model year may be different.

UPDATE: For a shorter video & a demo of the tire light going off after re-inflation, check out the below video I later did when the tire light came on again months later from a leaking tire. The point here is this is a self-correcting system if pressure is low, once air pressure is correct in each tire the light goes off right away and you're done. The exception is if you have a bad sensor, etc.
   • Lexus RX350 Tire pressure light-PROOF...