Alfa Romeo Stelvio Daytime Running Light Bulb Size

Additional Notes

• The H15 is a dual-filament halogen bulb operating on 12 volts, with a rated wattage of 55W for the high-power filament and 15W for the low-power filament. In automotive applications, the higher-wattage filament typically serves the main driving beam function, while the lower-wattage filament handles the daytime running light function.
• The H15 bulb uses a PGJ23t-1 base, which is a proprietary fitting not shared with other common halogen types such as H4 or H7. This base design means the H15 is not interchangeable with other dual-filament halogen bulbs despite serving a similar functional role.
• The H15 is governed by ECE regulations, a standard recognized across Europe and numerous other markets worldwide. Bulbs carrying ECE approval are subject to defined output and safety requirements under that framework.
• The Alfa Romeo Stelvio uses the H15 bulb size for its daytime running light across the 2018-2023 model years, representing the full span of years covered in these specifications.
• For the 2018-2020 Alfa Romeo Stelvio, the H15 fitment is specifically associated with the Halogen Capsule Headlamp configuration, indicating that this trim or option level is the applicable context for that bulb size in those years.
• The 2021-2023 model years list the H15 without a headlamp configuration qualifier, whereas the 2018-2020 entries carry the explicit "With Halogen Capsule Headlamps" condition.