Because he is samir
the microswitch that operates as a sensor is apereantly inside the lock mechanism in the door: http://www.taligentx.com/passat/maintenance/doorlockmechanism/
Yes. It is in the door latch.
Pull the door panel off, remove the door latch assembly from inside the door, and replace the switch which is hold onto the latch with one screw on the backside of the latch.
Perhaps someone has tried to pry the door open. You may need to realign or replace the sensor switch.
You would need to take off the door panel in order to remove it. I've included an auto repair video in "related links" down below that will show you exactly what needs to be done to replace it on your 2000 Volkswagen Passat. Hope this helps you out.
It seems the switch sits as an integrated part oft the door locking system, and that the "physical" switch is actually the door latch itself.
No.
Yes
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The door ajar switch is part of the door latch.
The door ajar switch is part of the latch, inside the door.
Door sensors are at the door latch. The sensor is actually a mechanical switch. This switch rides on a cam lobe that activates the switch on & off. The switch is very sensitive and if there is any kind of wear in the lobe of the cam can indicate door open even if it is shut. The only way to repair or fix the issue is open the door latch from the door and replace the latch assembly or build up the wear area. I used a kapton tape to build up the wear area and it fix the problem. Do not over build the area.