Thats interesting, i just fitted my towbar this weekend with the dual sockets exactly as shown in pic above and it did interfere with my parking sensors. I've had to fit the sockets below and set back from the bottom of the bumper. The Protector plate (above the towbar) doesn't interfere at all. Testing it was fun though, i moved the dual socket around for about 10 mins before realizing that i was setting off the sensor! :)