Chevrolet Bolt EV Dome Light Bulb Size

The Chevrolet Bolt EV dome light requires a unique bulb size of 12961 for proper installation and function within the interior lighting housing. Data for the specified component covers the range from 2020 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 Size
2023	12961
2020	12961 (Value Added Asm Roof Trim)

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The 12961 is a miniature wedge bulb in the T10 form factor, using a W2.1x9.5d base. It operates at 12 volts and draws 5 watts, placing it in the low-wattage range typical of interior courtesy and dome lighting applications.
The W2.1x9.5d base designation refers to a wedge-style base with a 2.1mm wire width and a 9.5mm pin spread, a standardized format that allows the bulb to seat directly into a matching socket without a separate locking mechanism.
The Chevrolet Bolt EV uses the 12961 bulb for its dome light in both the 2020 and 2023 model years.
The 2020 fitment is specifically associated with the Value Added Assembly Roof Trim configuration, indicating that this bulb position is tied to a particular trim or assembly variant rather than applying universally across all 2020 Bolt EV builds.
The 12961 designation in these specifications corresponds to a Philips part number, meaning direct cross-referencing with other manufacturers' part numbering systems may be necessary when sourcing equivalent replacements.