GENUINE NISSAN PATROL GU Y61 DOOR INTERIOR LAMP SWITCH RUBBER COVER (front door)
This is the rubber boot that covers the interior lamp switch on the body at the bottom of the FRONT door opening.
There are a couple of different types/shapes. This one is common to the front door only. Please check if your cover looks like this.
A damaged or split rubber boot will allow water and dust into the switch which may damage it or not allow it to operate properly.