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I just did it, and in my 2002 LS 430 it's in the bottom glove box. Open it up and in the back there's a panel that pulls up and out. Behind it is a white rectangular box with two pinch points at the bottom. Squeeze them and pull out the white panel face. Then you just pull out the filter, put your own back in, and replace. Took less than two minutes. Dealer wanted $110!