Description Reviews MINI Cooper Gas Cap! Is your MINI getting a gas cap code? Did it stop clicking? Is the o-ring cracking all around where it seals, causing the code? This new gas cap fixes it all. MINI made a change in the gas caps in 2011 to this new style. It fits all models in the lineup; but the tether is a bit shorter than we like for the gen one cars. They no longer make our old “green” cap so we have to deal.