Lexus 2003 LS Owner's Manual page 240

AUDIO
Caring for your compact disc player and discs
R Your compact disc player is intended for use with 12 cm (4.7
in.) discs only.
R Extremely high temperature can keep your compact disc
player from working. On hot days, use air conditioning to
cool the vehicle interior before you listen to a disc.
R Bumpy roads or other vibrations may make your compact
disc player skip.
R If moisture gets into your compact disc player, you may not
hear any sound even though your compact disc player
appears to be working. Eject all discs from the player and
wait until the player dries.
CAUTION
Compact disc players use an invisible laser beam which
could cause hazardous radiation exposure if directed
outside the unit. Be sure to operate the player correctly.
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20L037
R Use only compact discs marked as shown above. The
following products may not be playable on your compact
disc player.
Copy–protected CD
CD–R (CD–Recordable)
CD–RW (CD–Re–writable)
CD–ROM