May I suggest going to a wrecking yard and getting a oem unit from a vehicle in the yard. As mentioned above the camera in our Dodge Caravan works well and there are lots of them in the wreckers now.
The units that display in the corner of the rearview mirror are probably the most easy to install.
For the nay sayers the Gov. has mandated them in all light vehicles by model year 2018.
Some forward viewing recording devices also have a second rear looking camera.The better ones have a GPS speedometer and clock as part of the display.Handy when the speed signs are in Km/h. That is the way I have gone. It also proves in court what happened. Under $200.00 in Canada for a kit. Look on Amazon.
