Buick Envision License Plate Bulb Size

Additional Notes

• The Buick Envision uses the 12961 bulb for the license plate position across the 2016-2020 model years.
• The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
• T10 refers to the bulb's tubular shape, with the number indicating a width of 10 millimeters.
• The 12961 uses a W2.1x9.5d wedge base, which is a pinless base type that is held in place by the tension of the socket itself rather than by pins or a bayonet locking mechanism.
• The bulb operates at 12 volts and consumes 5 watts, which is typical for low-intensity automotive lighting positions such as license plate illumination.
• The T10 wedge base format is shared across many automotive applications, though fitment in a specific socket depends on the socket design of the vehicle rather than the bulb form factor alone.