Lincoln MKX Map Light Bulb Size

The Lincoln MKX map light utilizes 12961 and 168 bulb sizes depending on the specific version of the vehicle. Data for the lighting components covers the range from 2007 to 2015.

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
2011-2015	12961
2007-2010	168

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The Lincoln MKX map light bulb specification splits across two distinct part numbers depending on model year, with 2007-2010 using the 168 bulb and 2011-2015 using the 12961 bulb.
Both bulb types share the T10 miniature wedge form factor, meaning they occupy the same physical bulb envelope shape.
The 168 is an ANSI-standardized bulb recognized across the US and Canadian markets, operating at 12V and 4.9W.
The 12961 is a Philips part number designation rather than an ANSI industry standard, operating at 12V and 5W with a W2.1x9.5d base specification.
The W2.1x9.5d base designation on the 12961 describes a wedge-type base where 2.1mm refers to the wire contact width and 9.5mm refers to the base length.
Although both bulbs share the T10 envelope, the 168 and 12961 carry a 0.1W power difference, with the 12961 rated slightly higher at 5W.
The Lincoln MKX (2011-2015) map light position calls specifically for the 12961, and substituting a 168 without confirming base and socket compatibility is not advised given the differing base designations.
The 168 bulb has a long-established presence in North American automotive applications due to its ANSI standardization, making it widely available across multiple suppliers.