Blind Spot Detection System - Rear Bumper

[Silverstar]

I am thinking to install a blind spot detection kit to my Z4. This would be particularly useful as in my case I am sitting on the wrong side for the traffic here. The kit I am looking at uses microwave sensors that you fit behind the rear bumper onto the body of the car. In terms of location, from what I have seen it fixes onto each corner of the car body.

This I think will be a problem because from all the videos I have seen online regarding the bumper removal, I can see there is a large bracket on each side which does not allow for any space for a sensor to be fitted. Below you can see a photo of how the sensor is supposed to be fixed:



My question for anyone who has removed the rear bumper, could you please confirm if there is indeed any space to mount such a sensor to the corner of the car? As an alternative I could install an ultrasonic kit but that would mean drilling the side of the bumper and installing an ugly sensor to it!

 

[AnubisZed]

Alas my video doesn't show it enough, but these screenshots from another one show a good view.
It really depends how much "on the corner" it needs to be really.

 

[Silverstar]

Thanks for the photos Dave, that helps. I guess I need to get the fitting instructions from the factory to see where exactly the sensors need to be. I know apart from the angle they also need to be at least a certain distance off the ground.