Chevrolet Spark Dome Light Bulb Size

The Chevrolet Spark dome light utilizes 12961 and DE3175 bulb sizes for the interior lighting system. Provided data covers a span of time starting in 2013 and ending in 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
2019-2021	12961
2013-2018	DE3175

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, 31mm length, end-cap contacts. 12V.	DE3175

Other Locations

Additional Notes

The Chevrolet Spark dome light uses two distinct bulb types across its model years: the 12961 for 2019-2021 and the DE3175 for 2013-2018.
The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W.
The T10 wedge form factor uses a plastic wedge base with embedded wire contacts, which locks into the socket without a separate metal base or pins.
The DE3175 is an ANSI-standardized festoon bulb recognized across the US and Canadian markets, rated at 12V and measuring 31mm in length.
Festoon bulbs make electrical contact through metal end caps at each tip, which press against spring-loaded clips inside the housing rather than inserting into a keyed socket.
The two bulb types use fundamentally different socket and contact systems, meaning the 12961 wedge and the DE3175 festoon are not interchangeable with each other.
A wattage rating is specified for the 12961 at 5W, while no wattage value is listed for the DE3175 in these specifications.
The 2018 Chevrolet Spark represents the transition year between the DE3175 and the 12961, making correct year identification critical when sourcing a replacement dome bulb.