hi
i am having problem with my lhs rear alarm door sensor. where is it located. intially after closing the LHS rear door, the "door open" light ocassionally blink ( when driving). when parking, it will trigger the alarm and the led indicator shows the lhs rear door was open. now i can open the LHS rear door without triggering the alarm ( alarm activated). and the cabin light did not turn on as well.

where is it so it can be replaced?