Mini Cooper Trunk/Cargo Area Light Bulb Size

The Mini Cooper trunk/cargo area light bulb size chart specifies 2 distinct bulb sizes: 12961 and 6418 for this vehicle model. The replacement chart covers vehicle production years spanning 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

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Additional Notes

The Mini Cooper trunk and cargo area light uses the 12961 bulb across the 2007-2024 model years, while the 6418 bulb is specified for the 2002-2006 model years.
The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, operating at 12V and 5W.
The W2.1x9.5d base is a wedge-style connector, meaning the bulb is held in place by tension from the socket rather than by a separate locking mechanism or bayonet pins.
The 6418 follows the ANSI standard used in the United States and Canada, and it is a festoon-type bulb with a 36mm length and an SV8.5 base, also rated at 12V and 5W.
A festoon bulb seats by pressing its end caps into spring-loaded contacts within the housing, a mounting method that is physically incompatible with the wedge socket used for the 12961.
Although both bulb types share the same 12V, 5W electrical rating, their base types are entirely different, meaning the 12961 and 6418 are not interchangeable with each other.
The T10 designation of the 12961 refers to the bulb's tubular envelope width, which is a standard classification used to categorize miniature automotive bulbs by shape and size.
The SV8.5 base designation on the 6418 indicates a festoon base with an 8.5mm contact cap width, a common specification for interior automotive festoon lamps.