Jaguar E-Pace Map Light Bulb Size

The Jaguar E-Pace map light requires bulb size DE3423 or 12961 depending on the specific vehicle configuration. Data for the bulb sizes covers the range from 2018 through 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 Type	Shop
2023-2024	DE3423	Check Price
2018-2020	12961 (Outer)	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423	Check Price
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961	Check Price

Other Locations

Additional Notes

The DE3423 is an ANSI-standardized festoon bulb used in North American markets. It measures 41mm in length and makes electrical contact through end-cap terminals rather than a wedge or pin base. It operates at 12V.
The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base. It operates at 12V with a 5W output and is positioned as the outer map light in its applicable fitments.
The Jaguar E-Pace uses two distinct bulb types across its model years for the map light position. The DE3423 festoon applies to 2023-2024, while the 12961 wedge applies to 2018-2020.
The festoon and wedge formats are physically and electrically incompatible with each other. The end-cap contact design of the DE3423 and the wedge base of the 12961 require different socket types, making cross-year substitution between these two bulbs unsuitable.
The 12961 is designated specifically as the outer map light bulb for the 2018-2020 E-Pace, indicating that the map light assembly in those years contains more than one bulb position.