Symptoms
It's 5,000 miles since the last rotation. Or the tire positions are wrong on the display after a rotation, or you're fitting a second set of wheels. If the sensor IDs aren't registered, the manual says the TPMS light blinks for a minute after about 20 minutes of driving and then stays on.
The fix, step by step
- The Lexus schedule rotates the tires every 5,000 miles.
- Torque the wheel nuts to 97 ft-lb and recheck them after 1,000 miles.
- After a rotation, register the wheel positions.
- Park for 15 minutes or more with the engine off, then start it and choose Vehicle customize > Tire pressure > Tire rotation > Continue on the center display.
- Drive at about 25 mph or faster, with occasional left and right turns, for 10–30 minutes.
- Reversing clears the data.
- New sensors use 'New tire registration' on the same menu, and the GX stores two sets of IDs ('Set 1' and 'Set 2'), so a winter or trail wheel set can be swapped in about two minutes once registered.
- If you change tire size or run different pressures, set the tires cold and then use 'Set current air pressure.' Lexus warns the system may not work properly on non-genuine wheels.
- Every wheel needs a sensor.
- The spare hangs under the rear on a chain, and the holding bracket is tightened to 34.7 ft-lb.
Tools & part numbers
- Floor jack and stands
- torque wrench
- tire gauge
- a quiet road for the registration drive
Where to buy the parts
Tire pressure sensor (search by VIN)Lexus Genuine Parts ↗
Digital tire pressure gaugeAmazon ↗
Hunting a used or discontinued part? Search eBay Motors for Lexus GX 550 parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.