Audi S5 Sportback Turn Signal Bulb Size

Audi S5 Sportback front turn signal bulb replacement uses 12174NA or 12174SV size bulbs. The chart covers bulb size specifications across the 2019 to 2024 production range.

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 Type	Shop
2023-2024	12174NA	Check Price
2021	12174SV	Check Price
2019	12174NA (With HID Headlamps)	Check Price

Bulb Specifications

Description	Type	Shop
OEM part number. Natural amber glass variant. 12V.	12174NA	Check Price
Philips SilverVision part number. Enhanced coating halogen bulb. 12V.	12174SV	Check Price

Other Locations

Additional Notes

The 12174NA is an OEM part number designating a natural amber glass bulb operating at 12 volts. The amber coloring is built into the glass itself, which produces the required turn signal color without relying on a tinted lens or external filter.
The 12174SV is a Philips SilverVision part number for an enhanced coating halogen bulb, also rated at 12 volts. The SilverVision coating gives the bulb a silvered appearance when unlit while still producing the necessary amber output when energized.
The Audi S5 Sportback front turn signal uses the 12174NA for the 2023-2024 model years, indicating consistent fitment across that period.
The 2021 model year front turn signal uses the 12174SV rather than the 12174NA, meaning the two part numbers are not interchangeable across all model years despite both operating at 12 volts.
The 2019 model year front turn signal specifies the 12174NA exclusively for vehicles equipped with HID headlamps, indicating that headlamp type is a relevant fitment variable for that year.