Got my Hitch Saturday via FedEx. 2 hours later everything was installed and re-assembled. This hitch comes with factory wiring harness pre-installed including the grommet for passing through the body already attached. The instructions are clear, however the kit lists that it comes with a "ball mount" and mine did not - no matter I have one already anyway.
The box says genuine Toyota part, but it had been taped shut, so I believe that maybe they removed the ball mount piece -maybe. There is no picture diagram as to what is included, but there are plenty of diagrams for installation. Also, the instructions are clear that if you don't have the "Tow Package" you need a converter; the part number is listed and instructions for installing it.
Installation is easy and I did it myself. The hardware is composed of all bolts and one nut. There are 2 brackets that mount to the frame, and then the entire hitch assembly mounts to the brackets and the frame. The drivers side mounting bracket that is attached to the frame has bolt welded to it - this is where i diverged from the directions. The directions claim to put the hitch assembly over the muffler first, but this bolt is actually made to use as a one man starting point. I laid the hitch on the ground under the RX and lifted the drivers side up onto the bolt and started the nut on this bolt. Then I lifted the passenger side up and started the bolts there. This is how it should be done, as that is why there is only one nut.
The wiring harness is partially pre-attached to the hitch, and where it requires additional attachment, there are built in connectors and mounting locations - no zip ties or tape required.
I have installed hitches before and this is one of the easiest I have done, and is far superior to aftermarket solutions. For the price, it is actually cheaper then buying an aftermarket hitch and buying a seperate wiring harness. The only cheaper deal is if skip a plug in wiring harness and go for splicing in wires.
Pictures are attached: