Lexus RX300 2003, Owner'S Manual

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2003 RX300 from Aug. 02’ Prod. (OM48442U)
(c) Air filter
The air filter may clog after long use which will reduce the air
flow. However, you can inspect the filter easily.
When you inspect and replace the air filter, be sure to turn off
the fan.
20R040b
1. Open the glove box and remove the two covers.
20R452
2. Take out the filter case.
20R453
3. Remove the filter from the filter case.
4. Inspect the filter on the surface.