Subaru Ascent Cargo Box Bulb Size

The Subaru Ascent cargo box requires a unique bulb size of 12961 for the specific lighting component located within the rear storage area. Available data for the specified vehicle covers the range of 2022 to 2023.

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
2022-2023	12961	Check Price

Bulb Specifications

Description	Type	Shop
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961	Check Price

Other Locations

Additional Notes

The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor. It uses a W2.1x9.5d base, which is the standard wedge-style base that requires no locking tabs or rotation to seat, relying instead on spring tension from the socket walls to hold the bulb in place.
The 12961 operates at 12 volts and 5 watts, placing it in the low-wattage range typical of interior and auxiliary lighting applications where heat output and current draw are kept minimal.
The Subaru Ascent uses the 12961 bulb for its cargo box lighting across the 2022-2023 model years.
The T10 wedge format is one of the most widely produced miniature bulb types, and the W2.1x9.5d base is shared across many automotive interior applications. However, physical interchangeability with other T10 bulbs does not guarantee identical voltage or wattage ratings, and substitutions outside the 12V, 5W specification may affect socket compatibility or circuit behavior.