Alfa Romeo Giulia front and rear fog light bulbs require H11 size replacement bulbs. The chart covers 2017 to 2023 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H11 is the sole bulb type across all fog light positions listed for the Alfa Romeo Giulia, appearing in both front and rear fog light applications.
The H11 is a single-filament halogen bulb operating at 12 volts and 55 watts, making it a mid-wattage halogen unit suited to fog light duty.
The H11 uses a PGJ19-2 base, a proprietary locking connector that is not interchangeable with other common bases such as H8 or H9, despite those bulbs sharing a similar physical form factor.
The H11 is rated under ECE standards, giving it approval for use across European and worldwide markets, and it also carries US approval.
The Alfa Romeo Giulia front fog light position uses the H11 bulb across the 2017-2020 model years.
The rear fog light position on the 2021-2022 Giulia specifies the H11 bulb specifically for vehicles equipped with HID headlights, indicating a trim-level or package dependency for that fitment.
The 2023 Giulia rear fog light lists the H11 without any HID headlight condition attached, distinguishing it from the 2021-2022 rear fog light entries.