There is a fellow on Ebay that has a kit that allows rear view. The X3 is particularly a good deal, and is less than half the other BMW models. He seels the video input kit for $199. There are lots of cameras out there for < $50. I have not seen one that works for front and rear on the aftermarket. This would require mering two video streams. The aftermaret kit has two inputs, so you could add a switch to see front or rear. There are some BMW kits on EBay, but you need lots of pieces. BimmerNav sells the BMW stuff. I didn't look that closely because of the price. here is the link to the x3 page for all their offerings.
http://www.bimmernav.com/store/catal...-index-22.html
They have one that supports TV and camera, and another that is just camera. They also have a night vision one that costs $3500! They mostly sell genuine BMW parts. Of course the TV one is a foolish one to buy with analog TV disappearing. The video only model is like $576, which is why I thought the Ebay one was such a good deal. It is virtually plug and play for the box, although you have to route the camera wires yourself. You can get wirelsss cameras, but you still have to provide power. I believe it shold be pretty easy to get power from the license plate light.
The Ebay guy link is:
http://cgi.ebay.com/BMW-X3-Navigatio...efaultDomain_0
I have not put this in, yet, but I am waiting for spring and considering it.
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