I recently replaced my passenger side mirror on my 2006 IS250 Sport after someone knocked it off.

Ever since I replaced it and reattached the battery I get a weird beeping noise when I unlock the car. Weirdly I don’t get it every time; usually after it’s been locked for a while.

Here’s a video which contains the sound: https://streamable.com/lhenol?src=player-page-share

Does anyone have a clue what this might be?