Parts required: ( I did this as inexpensive as possible)
Steel tow bumper bought on ebay (200bucks)
955-618-040-10 Control Unit 955-612-506-00 Wiring Harness PNA-955-118-93 Trailer Hitch Connector (this is the 7 pin Pollak connector) PNA 955-127-08 7-4 way Adapter
N-909-892-01 bumper bolts (8)
Tools required:
Allen key set
10mm wrench
screw driver
1/4" ratchet
torx driver set
flashlight
21mm socket
torque wrench
Step 1: Remove spare tire floor by pulling hatch out towards the rear. There are no bolts that hold this in.
Step 2: Use the torx bits to remove the chrome tie downs on the passenger side as well as the bolt closest to the hatch
Step 3: After removing the side carpeted piece, there will be two additional screws underneath that hold the vertical carpeting piece in
Step 4: Remove pillar cover on passenger side. Pull plastic cover labeled "airbag" off and remove screw underneath. Carelly work cover free at the top first.
Step 5: Remove the exposed screw on the lower portion of the pillar
Step 6: Disconnect trunk light
Step 7: Remove the passenger side net anchor screws
Step 8: Pull the passenger side section down. The clips are very tight, so be careful when prying the plastic. This is where the clip locations are.
Step 9: Slowly pry passenger side pillar cover off, starting at the top. Once you reach the speaker, be sure to disconnect the wire as shown.
Step 10: Remove screw that is now exposed on the rear pillar
Step 11: Carefully pull the passenger side carpet panel out as shown.
Step 12: Use the flashlight and look in between the carpet panel and the inner fender well. Pull out the pre-located harness plug, roughly half way in towards the front as shown. The plug is RED
Step 13: Pull out and connect to the module. Plugs are specific so it will only fit into the center plug. Leave hanging for later use.
Step 14: Remove both tail light allen bolts on the inside of the hatch area. They will be covered by two plastic plugs as seen below.
Step 15: Carefully pry tail lights straight out towards the rear. There are 2 clips, one forward, and one rear on each lense. Disconnect harness and set aside.
Step 16: Remove both torx screws on the bumper cover that were previously under the tail lights
Step 17: In each fender well, remove the torx screws, starting in the rear, moving to the top of the fender. No need to remove all of them, you just need to access a hidden screw under the fender liner.
Step 18: Remove hidden screw on both sides in the fender well. This is somewhat difficult to access, the torx bit will be FACING towards the rear of the car, close to the 10 o'clock position in the fender well.
Step 19: Remove the lower allen bolts in the bumper cover
Step 20: carefully wiggle the bumper cover free. The parking assist sensors will still be plugged in, so don't completely remove. Once far enough out, locate and disconnect plug on the DRIVER side
Step 21: Remove foam and sensors as one, and save for reinstall. Loosen 8 bolts holding on aluminum bumper and completely remove bumper.
Step 22: Install new STEEL bumper with hitch. Torque bolts to 140 lb/ft
Step 23: Reinstall parking sensors and foam on top
Step 24: Install plug cover into harness
Step 25: Remove plastic cover on bumper support, and use screws to attach harness and plug assembly.
Step 26: Route harness along the bottom of the bumper support towards passenger side. Remove rubber grommet and replace with grommet already attached to the wire harness. The wire ties should be positioned perfectly to install in holes in the bumper support.
Step 27: Grab harness on the interior side, and route up and over the factory cd changer to the existing plug you found early on. Plug into module.
Step 28: Using screws, install module on top of existing electronics in passenger side area. There will only be 2 plugs even though there are three sockets on the module
Step 29: On the bumper cover, there are marking where to cut the relief for the receiver as shown below. I made the cut with a sharp razor blade
Step 30: Reinstall all components and panels in reverse order (have fun with all of this!)
Step 31: Locate the right fuse box on the side of the passenger side dashboard. Install a 15A fuse in slot 1, 3, and 5 plus replace slot 19 with a 30A.
FINAL STEP: IF YOU ARE LUCKY, the module ordered is already programmed for the US. Unfortunately, it seems like the dealerships are stocking the UK version. You will need someone with a porsche scan tool to reset the module to the US version (UK is the fold out version). If you don't have any errors on your dashboard, then you have the right US version. If you get a tow warning, you will need the module reset.
ENJOY!!