2015 bmw x1 alarm siren location

[Ax2008]

Hello I am new to this type of cars, i bought to my daughter a 2015 BMW x1, sdrive28i, and the dealership told me it has an alarm siren error (they didn’t told me how to fix it or if they can. Anyways, i am trying to physically locate the alarm siren, i looked on the rear right wheel i removed the wheel liner, part of the rear bumper and the siren is not there, i looked on the driver side next to the fender and is not there either, do you guys know where exactly the alarm siren could be? Or maybe this type of cars does not have alarm siren?

[X1_671]

Did you try checking the rear left of the car? It should be there in the fender lining