Alfa Romeo Giulia Trunk Bulb Size

Additional Notes

• The Alfa Romeo Giulia uses the 12961 bulb designation across all listed trunk fitments from 2017-2023, making it the sole trunk bulb size recorded in these specifications.
• The 12961 is a Philips part number referencing a T10 miniature wedge bulb, a format widely used in low-intensity interior and auxiliary lighting positions.
• The T10 designation describes the bulb's tubular envelope, with the number indicating a width of ten-eighths of an inch, placing it among the smaller wedge-type bulbs in automotive use.
• The base type is W2.1x9.5d, a wedge configuration that relies on the tension of the socket contacts rather than a bayonet or screw mechanism to maintain the electrical connection.
• The bulb operates at 12 volts and 5 watts, consistent with a low-draw auxiliary application such as trunk illumination rather than a primary lighting function.
• T10 wedge bulbs are produced by multiple manufacturers under various part numbers, meaning the 12961 Philips designation is not the only physical equivalent, though socket and voltage compatibility must be confirmed before substitution.