Alfa Romeo Giulia Turn Signal Bulb Size

Alfa Romeo Giulia front turn signal bulb uses PY24WNA size for replacement. 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.

Front Turn Signal

Years	Bulb Size
2023	PY24WNA
2021-2022	PY24WNA (With HID Headlights)
2017-2020	PY24WNA

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Amber variant of ECE PY24W with PGU20-4 base. 12V, 24W.	PY24WNA

Other Locations

Additional Notes

The PY24WNA bulb is the front turn signal fitment for the Alfa Romeo Giulia across the 2017-2023 model years.
PY24WNA is an ANSI-standard bulb designated for the United States and Canada market, functioning as the amber variant of the ECE-standard PY24W.
The bulb operates at 12 volts and 24 watts, which places it in a mid-wattage range typical of dedicated turn signal applications.
It uses a PGU20-4 base, a wedge-type bayonet fitting that is not universally interchangeable with other PGU20 base variants despite the similar designation prefix.
The ECE PY24W and the ANSI PY24WNA share the same wattage and base type but differ in their regulatory certification, meaning regional market compliance is a relevant factor in substitution decisions.
For the 2021-2022 Giulia, the PY24WNA fitment is specifically noted in association with HID headlight configurations, indicating a conditional trim-level dependency for those years.