Lexus RX 450h 2010 Owner's Manual page 269

2-5. Driving information
NOTICE
When you drive through water
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If driving through water, such as when crossing shallow streams, first check the
depth of the water and the bottom of the riverbed for firmness. Drive slowly and
avoid deep water.
Inspection after off-road driving
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Sand and mud that has accumulated in brake drums and around brake discs may
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affect braking efficiency and may damage brake system components.
Always perform a maintenance inspection after each day of off-road driving that
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has taken you through rough terrain, sand, mud, or water. For scheduled mainte-
nance information, refer to the "Warranty and Services Guide/Owner' s Manual
Supplement/Scheduled Maintenance".
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