I do not yet own a 4Runner but am considering purchasing a new 2012. Before I commit to buying one I want to try one out to see how it will tow my 3900 lb travel trailer. I will be renting one from a dealer for a day and towing my trailer to test it. I am concerned about towing without a brake controller so I am considering getting a Prodigy RF that doesn't need to be installed in the tow vehicle. I can then use it in whatever tow vehicle that I end up buying. Has anyone used the Prodigy RF in a 2012 4Runner? Will it work with no changes being made to the 4Runner?