had to to avoid the sensor. If I didn't have ACC though I think I would have offset it anyway.

 

I didn't want to drill bumper either and my solution (after I was pulled over) was a trip to the auto parts store where I bought some 1 inch 3M automotive double face tape. The same grade used on moulding and window ventshades (red peel off). 2 pieces between screw holes top and bottom and attached to bumper. Cheap, fast, looks clean and can be removed with no sign it was done. It's been on over a year and it is as secure as the day I did it.