Audi SQ7 Turn Signal Bulb Size

Additional Notes

• The 12174NA is a natural amber glass bulb operating at 12V. The amber coloring is built into the glass itself, which produces the required orange turn signal output without relying on a tinted lens or external filter.
• The 12174SV is a Philips SilverVision halogen bulb also rated at 12V. Its enhanced coating gives the glass a silver appearance when unlit, while still producing the required amber output when energized.
• Both the 12174NA and 12174SV share the same base designation (12174), indicating they occupy the same socket and electrical position in the Audi SQ7 front turn signal housing.
• The Audi SQ7 (2023-2024) uses the 12174NA for the front turn signal, while the 2021 model year uses the 12174SV. Although both bulbs are electrically and physically compatible with the same socket, they are distinct products with different optical coatings and should not be assumed to be interchangeable without accounting for the visual difference in appearance when the lamp is off.