It basically consists of four or
more sensors attached to the rear bumper of your car. It is
needed to be drilled on the bumper, which makes car owners
think twice about installing this type of reverse parking
sensor. As it is located outside the rear bumper, and it stands
out for everyone to see. You have to paint with the matching
color of your car bumper to make it indistinguishable.
Because an ultrasonic parking sensor is exposed, it will need
constant maintenance to avoid malfunction.