The CTA Manufacturing Magnetic Spark Plug Socket - 14mm x 12pt, No. 1180, is designed to service BMW, MINI, Mercedes, Porsche, Ford, Nissan, Infiniti, Toyota, Scion, Subaru, and more. It features a thin-wall design with a magnet for tight clearance and easy extraction. It has an overall length of 63.18mm and overall depth of 18.45mm with a 3/8” square drive. The factory spark plugs for the MINI N18 (2011+) engine are 14mm, but the electrode of some aftermarket spark plugs are larger, which blocks the socket from mating at the designated connection point, the company noted.