Genuine OEM BMW Spark Plug, part number 12120035747. This spark plug ignites the air-fuel mixture in the engine cylinders. It is a critical component for combustion. The spark plug has a weight of 0.042 kg and dimensions of 0.0866 m x 0.0234 m x 0.0214 m. Genuine OEM spark plugs ensure precise electrode gap and material composition for optimal ignition and engine longevity.