Lexus IS350 AWD Owner's Manual page 567

The compact spare tire
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The compact spare tire is identified by the label "TEMPORARY USE ONLY" on the
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tire sidewall.
Use the compact spare tire temporarily, and only in an emergency.
Make sure to check the tire inflation pressure of the compact spare tire.
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(P. 595)
When using the compact spare tire
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As the compact spare tire is not equipped with a tire pressure warning valve and trans-
mitter, low inflation pressure of the spare tire will not be indicated by the tire pressure
warning system. Also, if you replace the compact spare tire after the tire pressure warn-
ing light comes on, the light remains on.
When the compact spare tire is equipped
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The vehicle becomes lower when driving with the compact spare tire compared to when
driving with standard tires.
If you have a flat rear tire on a road covered with snow or ice (vehicles with front and
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rear tires of the same size)
Install the compact spare tire on one of the front wheels of the vehicle. Perform the fol-
lowing steps and fit tire chains to the rear tires:
Replace a front tire with the compact spare tire.
1
Replace the flat rear tire with the tire removed from the front of the vehicle.
2
Fit tire chains to the rear tires.
3
IS350 AWD/IS350/IS300 AWD/IS300_U
8-2. Steps to take in an emergency
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