Maserati GranTurismo Turn Signal Bulb Size

Additional Notes

• The front turn signal bulb for the Maserati GranTurismo is the 12961 across all model years from 2008-2019.
• The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
• T10 bulbs are small, wedge-shaped lamps commonly used in low-intensity automotive lighting positions such as turn signals, parking lights, and courtesy lights.
• The 12961 operates at 12 volts and draws 5 watts, placing it in the low-wattage category typical of indicator and auxiliary lighting applications.
• The base type for this bulb is W2.1x9.5d, which is the standard wedge base used across the T10 family, where the bulb is held in its socket by the tension of the glass envelope rather than a locking mechanism.
• Because the W2.1x9.5d base is a widely standardized fitting, T10 bulbs from various manufacturers are generally interchangeable as long as voltage and wattage ratings are matched.
• Substituting a bulb with a higher wattage than the specified 5W risks exceeding the thermal and electrical tolerances of the GranTurismo's front turn signal socket and wiring.