The 'vents' behind the seat and between the bed are backdraft dampers, they are designed to let air out and not in. Mainly there for closing the doors.
Those that want to add a filter need to make sure it is oversized. A filter restricts airflow and if it wasn't designed for it then can cause issues especially for your AC. If your AC doesn't work very well already, then this potential mod will definitely make it worse.
Those that want to add a filter need to make sure it is oversized. A filter restricts airflow and if it wasn't designed for it then can cause issues especially for your AC. If your AC doesn't work very well already, then this potential mod will definitely make it worse.