It depends which sensors. You can get reasonably cheap parking sensors on Amazon, but they often need to be fitted at a garage because most require drilling. Or you can go for something pricier, like ...

Parking sensors are very useful in many situations. Unfortunately, while some vehicles are fitted as standard with them, others are not. So, the only option is to buy a set and either install it ...

A reversing camera is a handy aid - but commonsense is still required. Pictures / Camz Autosound and Security Have you noticed? A lot more vehicles are fitted with parking sensors and reverse cameras ...