Mini Cooper Countryman Tail Light Bulb Size

The Mini Cooper Countryman tail light utilizes a P21W bulb size for illumination across all listed vehicle versions. Provided data covers a specific range starting from 2011 through 2022.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2021-2022	P21W
2011-2019	P21W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W

Other Locations

Additional Notes

The P21W is the sole tail light bulb type specified for the Mini Cooper Countryman across all listed model years from 2011-2022.
The P21W is an ECE-standardized single-filament bulb rated at 12 volts and 21 watts, designed for signalling applications such as tail, brake, and turn functions.
The P21W uses a BA15s bayonet base, which is a single-contact fitting. This base type is not interchangeable with dual-contact bayonet bases such as the BA15d, and substituting an incorrect base type will result in improper fitment.
The ECE designation on the P21W indicates the bulb conforms to European and international regulatory standards, reflecting its origin as a specification common in European vehicle manufacturing.
Because the P21W is a single-filament bulb, it performs one lighting function per socket. Assemblies requiring separate brake and tail functions use dedicated sockets for each rather than a dual-filament alternative.
The 21-watt output of the P21W places it in a higher power category than the 5-watt and 10-watt bulbs used for parking or side-marker roles, which is consistent with its use in higher-visibility signalling positions.