Jeep Compass Map Light Bulb Size

The Jeep Compass map light utilizes bulb sizes 12961, 168, and 578 for the interior lighting system. Data for the specific components covers the range from 2007 through 2021.

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	12961
2018-2020	168
2017	578
2007-2013	578

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
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V, 12W.	578

Other Locations

Additional Notes

The Jeep Compass map light specifications reference three distinct bulb types across its model years: 12961, 168, and 578.
The 578 is a festoon-style bulb rated at 12V and 12W, with a 41mm length and end-cap contacts. It is the bulb type specified for the Jeep Compass across the 2007-2013 and 2017 model years.
Festoon bulbs make electrical contact through metal caps at each end of the bulb body, which distinguishes them physically and electrically from wedge-base types.
The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W, classified under the ANSI standard used in the US and Canada. It is specified for the 2018-2020 model years.
The 12961 is a Philips-designated part number for a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. It is specified for the 2021 Jeep Compass.
Both the 168 and 12961 share the T10 wedge form factor, though they carry different part number designations and a slight wattage difference of 0.1W.
The W2.1x9.5d base designation on the 12961 describes a wedge base with a 2.1mm wire width and a 9.5mm insertion depth, which is the standard physical definition of the T10 wedge base type.
The 578 festoon type draws 12W, notably higher than either the 168 at 4.9W or the 12961 at 5W, reflecting a different bulb construction rather than a direct substitution relationship between the two generations of Compass specifications.
The ANSI designation on both the 168 and 578 indicates these bulbs conform to standardized North American specifications for base type, voltage, and wattage, rather than being proprietary part numbers.
Because the 578 festoon and the T10 wedge types use fundamentally different base configurations, they are not interchangeable with one another regardless of voltage compatibility.