For 1990-2009 cars

### Removal Procedure

1. Open the rear compartment.
2. Remove the rear bumper fascia. Refer to Rear Bumper Fascia Replacement .
3. Pull back the rear compartment trim panel.
4. Apply pressure at 2 upper locations and 2 lower locations, using a small, flat-bladed tool in order to release the retainers on the pressure relief valve.
5. Remove the pressure relief valve from the lower quarter panel.

### Installation Procedure

1. Install the pressure relief valve to the lower quarter panel.
2. Press the pressure relief valve into the quarter lower panel until the retainers lock into place at the upper and lower locations.
3. Pull back the rear compartment trim panel.
4. Install the rear bumper fascia. Refer to Rear Bumper Fascia Replacement .
5. Close the rear compartment.