I feel this is a must do for the Previa.

Clean out the IAC valve and put in the "flake filter".


IAC valve and "flake filter"
- Fram G15 inline filter - this for the flakes going into the ventilation tube.
- 2 small hose clamps for the filter.
- Throttle body gasket - 22271-76020
- IAC valve rubber gasket - 22215-76010 - gasket between the IACV and Throttle body
- IAC valve screws (set of 4) - 21821-25180 - holds the IACV to the throttle body