Pressure Relief Vent Description
WARNING: This page is about a different car, the 2006 Suzuki Verona. However, it is still accessible from the selected car via links, so may be relevant.
When all the windows are closed and the ventilation system is ON, the addition of outside air to the interior of the vehicle causes a positive pressure within the vehicle. To relieve the pressure, air is released through a pressure relief vent. The pressure relief vents are located at the rear quarter of the vehicle, behind the bumper fascia.