The entry point to BMW ownership, the BMW 1 Series packs premium engineering and Condition Based Servicing into a compact hatchback body. That intelligent system tracks each service item and needs resetting whenever maintenance is completed. Typical tasks include the oil service reset, resetting individual CBS items, a TPMS reset after a wheel change, and electric-window reinitialisation after battery work. BMW switched the 1 Series from rear- to front-wheel drive and updated its iDrive menus along the way, so the procedures differ by generation. Select your 1 Series production years below to follow the matching guide.