Mini Cooper Dome Light Bulb Size

The Mini Cooper dome light bulb utilizes 2 distinct sizes: 12961 and 6418, with each bulb size corresponding to specific vehicle configurations. The replacement chart covers vehicle production years spanning from 2002 to 2024.

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
2007-2024	12961
2002-2006	6418

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6418

Other Locations

Additional Notes

The Mini Cooper dome light bulb specification calls for two distinct bulb types across its production history: the 12961 for model years 2007-2024 and the 6418 for model years 2002-2006.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, fitted with a W2.1x9.5d base and rated at 12V, 5W.
The T10 wedge base of the 12961 is a push-in style connector, meaning the bulb is retained by friction rather than by a bayonet or screw mechanism.
The 6418 follows the ANSI standard recognized in the United States and Canada, designating a festoon bulb with a 36mm length and an SV8.5 base, also rated at 12V, 5W.
A festoon bulb with an SV8.5 base makes contact at both ends of its cylindrical body, a mounting style fundamentally different from the wedge base used by the 12961.
Both the 12961 and the 6418 share identical voltage and wattage ratings of 12V and 5W, though their physical form factors are not interchangeable with each other.
The Mini Cooper (2002-2006) requires the festoon-style 6418, while the 2007-2024 model years require the wedge-style 12961, and substituting one type for the other is not supported by these specifications.
The 36mm length of the 6418 festoon bulb is a critical fitment factor, as festoon bulbs of differing lengths will not seat correctly in a housing designed for the 36mm specification.