Fitting parking sensors

[Executive]

Hi all, how difficult would it be to fit parking sensors front and rear to my 05 Corolla 4dr? I'm under the impression the car never had factory sensors, which makes getting rear sensors with a factory bumper difficult.

If not, how difficult would a rear parking camera be to accomodate without affecting the original head unit?

Many thanks

[FROSTYBALLS]

We had dealer fit rear parking sensors which provided an audible warning on our 2006 Corolla hatchback, so they should also be available for the saloon. Given the age of the vehicle you'd probably be best going for a third party set.  

[Woofwoof]

Might be easiest to get a cheap reverse camera with a mirror screen that’s clips onto your rear view mirror

quite cheap on eBay