This is a genuine part for a Wish ANE11W 2000ccZ. It was replaced with Iridium Tough VKA20 spark plugs (pictured) at approximately 30,000km and has been stored since. I believe it should function normally. It can also be used in the Isis 2000. I think genuine parts are more reliable. How about replacing them if you've driven over 100,000km? You can replace them yourself relatively easily. I am selling them because I am replacing my car. This is a set of 4. They are genuine parts, unlike the box. Thank you.