Alfa Romeo Giulia Courtesy Bulb Size

Additional Notes

• The 12961 is a Philips miniature wedge bulb in the T10 form factor, using a W2.1x9.5d base and rated at 12 volts and 5 watts. The T10 designation refers to a tubular bulb roughly 10/32 of an inch wide, and the W2.1x9.5d base is a standard wedge-type fitting common in low-wattage automotive interior applications.
• The Alfa Romeo Giulia uses the 12961 bulb for courtesy lighting across the 2021-2023 model years, making it the sole bulb size specified for this function across that range.
• The 2021 and 2022 model years carry a "With HID Headlights" qualifier on the 12961 fitment, indicating that this specification applies specifically to Giulia vehicles equipped with HID headlights in those years.
• The 2023 model year lists the 12961 without any HID qualifier, suggesting the specification applies regardless of headlight type for that year.
• The W2.1x9.5d wedge base is a push-in fitting with no locking mechanism, relying on tension from the socket to retain the bulb. Substituting a bulb with a different base type would result in an incompatible fit even if the physical envelope of the bulb appears similar.
• At 5 watts and 12 volts, the 12961 draws approximately 0.42 amperes. This low power draw is characteristic of courtesy and interior accent lighting, where prolonged use without the engine running is a common operating condition.