You need to replace the cowl trim panel (air inlet grille) on the passenger side under the wiper arm. Also install a new cabin filter if equipped, and plan on a new blower motor. Be sure to get new retainer clips also. Also, make sure the plenum water deflector is in place.
Below is a picture of the air inlet grille (left side of picture)

Below is a picture of the deflector.

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Wednesday, February 13th, 2008 AT 10:17 AM