The Genuine BMW Label Exhaust Emission (My12) - 71227631021 is a small, rectangular sticker with the words Exhaust Emission printed on it. It is an official product from BMW and is designed to be placed on a vehicle's exhaust system. This label serves as a visual reminder for the driver to be aware of the emissions being released from their vehicle. It is specifically designed for use on BMW models from the year 2012 and has the part number 71227631021.