These are a pain to install. Its a pain running the cable from the radio head unit to the back of the car, to the trunk. I did it on a VW and needed the big manual to figure how to take the seat apart to get behind it. Also had to run through the trunk hinge area. Oh and the wiring in the breaklight that you need to tap into is crazy thin. Never did get mine to stay with the good connection and not enough slack to risk cutting this wire for lights that you need to be legal on the road. Spend the $100 to get this $20 part installed by a pro.