Backup camera or Backup sensor

[kisshmet]

just dont rely too much with technology, be aware of the limitation of whatever backing sensor you get to choose. ultrasonic transducers require a flat plane facing it like a wall in order to be effective (detecting a pole is its common failure or a gutter below the bumper) while a cameras field of view may be limited as well as lack of proper lighting with a busted reversing lamp will hamper its effectiveness

if you are fond of parking in a reverse manner, scan the parking slot with your own eyes & be wary of potential obstructions. as you make your approach use the mirrors (rear view/side mirror) as guide. when you get close use the technology attached to your vehicle. to make sure, LOOK BACK anyway because direct view gives you a more accurate view of the position of your rear bumper or mudguard relative to any obstructions from behind