Lexus 2003 SC430 Owner's Manual page 259

IN CASE OF AN EMERGENCY
NOTICE
D Do not use liquid sealants for a flat tire as air pressure
sensors will be damaged.
D Do not continue driving with a deflated tire. Driving
even a short distance can damage a tire beyond
repair.
D When the tires must be repaired or replaced, have
them repaired or replaced by the nearest Lexus
dealer or authorized tire dealer. The tire pressure
sensors will be affected by the installation or removal
of tires.
D When the tires must be replaced, replace the
grommets for air pressure sensors as well.
242
Compact spare tire
40sa24a
The compact spare tire is designed for temporary
emergency use only.
The compact spare tire is identified by the distinctive wheel
design and color and special wording "TEMPORARY USE
ONLY" molded into the side wall of the tire.
To keep the compact spare tire noticeable, do not hide the
wheel by a wheel cover or such.
The compact spare tire saves space in your luggage
compartment, and its lighter weight helps to improve fuel
economy and permits easier installation in case of a flat tire.