Lexus 2003 LS Owner's Manual page 325

40L135a
7. Remove the wheel ornament.
When installing the alloy wheels, at this point, remove the
wheel ornament from the flat tire.
IN CASE OF AN EMERGENCY
40L092
Before putting on the wheel, remove any corrosion on the
mounting surfaces with a wire brush or such. Installation of
wheels without good metal–to–metal contact at the mounting
surface can cause wheel nuts to loosen and eventually cause
a wheel to come off while driving.
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