The BMW 1 series has been in production since 2004 and are classified as subcompact executive cars. This means they’re a premium line of vehicles that are in between the compact and executive size of cars. The BMW 1 series is considered to be the entry level of model ranges by BMW. The first generation produced from 2004-2011 had body styles ranging from convertible to hatchback and coupe. The convertible and couple models began being marketed in the 2 series in 2013. If you own a model in the BMW 1 series, you will want to make sure the replacement parts you purchase are specifically for the make and model you own. Only OEM BMW parts are going to meet the specifications of your vehicle and perform at a high level.