Mine went 3 years ago, the other flat underneath at the screw hole. Benny pointed it out to me that it had broke and i said one of his work mates supposedly put another one on and subsequently charged about £150. It had never been done, just codged up.
This aint the first i have noticed there are numerous other things that have never ever been touched since car was assembled and accordingly charged the wicked rates- If you want a job doing you do it yourself.