Originally Posted by SeattleLion

That's not correct. If you get the navi, the backup camera comes with it and uses the navi screen. If you don't buy navi, you can still get the backup cam using the rearview mirror. I have an aftermarket camera working in my navi and I love it. My wife's Toyota Tacoma came with the homelink, mirror version. It's not bad and a reasonable choice if you aren't going to order the navi.