I installed this one bought it from the dealer. Took about two hours to install. I just changed the oil filter and topped up the oil rather than a complete oil change. I bought a jug of coolant from the dealer as well as you pretty much drain the system. Once thing you have to have is a 12mm allen wrench to remove the stud and put in the new longer one the oil fileter threads onto. It was a fairly easy swap out and I honestly haven't noticed any diiference as far as temperature gauge goes. Just want to cover my a** when it comes to warranty issues.