Change Your Mini Cooper Spark Plugs Like a Pro for One Third the Price! Everyone knows spark plug changes are suggested every 20k miles or so for tuned vehicles. Everyone also knows 2007+ R56 R55 R57 Cooper & Cooper S requires a special thin walled socket to remove/reinstall the spark plugs. But what you might not know is the BMS socket fits like a glove and is only one third the price of a MINI socket! It also includes an integrated rare earth magnet to secure the plugs while raising and lowering them in the long bores. Ours will never wear out like spark plug sockets with rubber or metal tensioners to hold the spark plug in. Fits standard 3/8 Drive Socket Wrench. The RIGHT tool for the job makes MINI spark plug replacement a snap! Magnetic 12 Point Thin Walled 14mm Mini Cooper Spark Plug Socket Tool. Recommended spark plug torque 17 lb-ft or 23nm.