Lexus ES 350 Owner's Manual page 374

NOTICE
If you remove the air cleaner:
■
Driving with the air filter removed may cause excessive engine wear due to dirt in
the air. Also a backfire could cause a fire in the engine compartment.
If the fluid level is low or high
■
It is normal for the brake fluid level to go down slightly as the brake pads wear or
when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, it may indicate a serious problem.
4-3. Do-it-yourself maintenance
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