Description Reviews MINI Cooper Oil Filter Cap by Dorman #11-42-7-557-011 This is an aftermarket cap, but works and functions just like the OEM one, but with a nice price savings! Fits all second gen cars with the N12 or N16 Cooper engines or the N14 or N18 Cooper S engines. We normally only have to replace these unless they are put on and over tightened. When installing it or removing it, you can break off the socket attachment from too much force. The only things not includes is a oil filter if you need that, but it comes with a new o-ring!