Hi, this is the light of the passenger side, when I take the lid off, the lens inside is so loose, it moves horizontally. Any idea what is wrong?

Its supposed to move. 

Its part of the AFS.

 

The lights move sideways during cornering. 

 

Read up about the electrical systems here

 

https://slideplayer.com/slide/10248235/

I have a look today but this one light looks like is completely loose compared to driver's side....  Will be good to see some headlight drowning, what is inside...

Edited May 7May 7 by Opal

Wait until it's dark, park with lights facing a wall, switch off car, make sure the light stalk is set to lights on. 

Start up engine, you should see both lights move up down and left right to auto adjust.

If that loose over does not move, then maybe someone has used too much force during a bulb change.