So, I had to buy this for my 2012 vw cc 2.0tsi locally, because when your pcv goes out on this car, it's a show stopper. VW will offer you an entire assembly for about 175.00, but this is the only part you'll need to replace. It works perfectly if you have a couple ounces of mechanical ability. All you will need to do is carefully pry the old diaphram cover off(it wont cause any problems if you crack the old cover, but don't put too much force on the pcv assembly) then line up the new diaphram and push it into place. It is a one shot deal, but not difficult to do.Quick info: Before my pcv was shot, I was getting a fuel rail error and an 0507 code. When it went out, I was at idle, in the driveway, and it sounded like a belt squealing(really loud!). Hopefully this is helpful to someone....