The Mini Cooper Countryman front and rear side marker bulbs both utilize a 12961 bulb size. The replacement chart covers vehicle production spanning 2011 to 2016.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mini Cooper Countryman uses the 12961 bulb for both front and rear side markers across the 2011-2016 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor with a W2.1x9.5d base.
The T10 designation refers to a tubular bulb roughly 10mm wide, a common size in automotive marker and courtesy light applications.
The W2.1x9.5d base is a wedge-type base, meaning the bulb is held in its socket by the tension of the glass envelope itself rather than by a separate metal cap or bayonet fitting.
The 12961 operates at 12 volts and 5 watts, which is a low-wattage rating typical of marker and position light applications rather than primary illumination functions.
Because the same bulb size is specified for both the front and rear side marker positions on the Mini Cooper Countryman, a single bulb type serves both locations on the vehicle.
The W2.1x9.5d base is not universally interchangeable with all wedge-base bulbs; the specific pin spacing and wedge width of this base must match the socket to ensure a proper fit.