It took me 15 minutes to do. One of the guys explains tha you need to use a rubber cap found in a coolant bypass kit to cover the plug to keep out dirt. I could not find this so I bought a bypass cap assortment found at OReillys. Checker or Auto Zone should have them also. The 1/2 inch cap will fit good but I had to use a zip tie around the cap before I slipped it on because without it it was a little loose. Just follow instructions on the posts. Car shifts like it's supposed to with no codes.