Subaru Crosstrek Trunk Bulb Size

Additional Notes

• The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, operating at 12 volts and rated at 5 watts.
• The T10 designation refers to the bulb's tubular shape, with the number indicating a width of 10 thirty-seconds of an inch, a standard sizing convention for miniature automotive bulbs.
• The W2.1x9.5d base type is a wedge-style base, meaning the bulb is held in its socket by the tension of the base itself rather than by a bayonet or screw mechanism.
• The Subaru Crosstrek uses the 12961 bulb for the trunk across the 2018-2019 and 2021-2024 model years.
• The 5-watt rating places this bulb in the low-power category typical of interior and cargo area lighting, where heat output and current draw are kept minimal.
• T10 wedge bulbs share a widely used base standard, which means the 12961 is physically interchangeable with other T10-based bulbs, though wattage and voltage ratings of any substitute must match the original specification to avoid electrical or fitment issues.