Audi SQ5 Headlight Bulb Size

Additional Notes

• The 9006 bulb, used in the Audi SQ5 high beam for 2023-2024, is an ANSI-standard single-filament halogen type rated at 12V and 55W with a P22d base, primarily specified for the US and Canadian markets.
• The H8 bulb appears across multiple SQ5 high beam positions from 2019-2021 and in certain 2017-2018 configurations. It operates at a notably lower wattage than the 9006, rated at 12V and 35W, with a PGJ19-1 base under ECE standards.
• The D3S is the most frequently listed HID bulb across the SQ5 range, covering high beam fitments from 2014-2018 and low beam fitments from 2014-2018. It operates at 42V and 35W with a PK32d-5 base and includes an integral ignitor designed for projector-type housings.
• The D5S, used in the low beam position for 2021 and 2023-2024, is a low-voltage compact HID type rated at 12V and 25W with a PK32d-7 base. Its 12V operating voltage distinguishes it from the higher-voltage D3S.
• The D3S and D5S bulbs are not interchangeable despite both being HID discharge types. Their base configurations differ, with the D3S using a PK32d-5 base and the D5S using a PK32d-7 base, and their operating voltages are also different.
• For the 2017 Audi SQ5, the high beam specification splits across three distinct bulb types depending on the vehicle's VIN and headlight system. The H7 applies to vehicles with xenon headlights up to VIN FP-H-150 000, the D3S applies to another configuration, and the H8 applies from VIN FY-H-000 001.
• The 2019 SQ5 high beam specification notes compatibility with both halogen and gas discharge headlamp systems, specifically referencing the D5/D7 system alongside the H8 halogen bulb, indicating that the H8 functions within a hybrid or auxiliary role in that headlamp configuration.
• The H7 and 9006 bulbs share the same 12V, 55W rating but use different base types and standards. The H7 uses a PX26d base under ECE standards, while the 9006 uses a P22d base under ANSI standards, making them physically incompatible despite identical electrical ratings.
• The 2018 SQ5 high beam position lists both the D3S and H8 as applicable bulbs, reflecting that two different headlamp system variants were fitted to that model year, each requiring a different bulb type.
• The H8 and H7 halogen bulbs, though both ECE-standard single-filament types approved in the US, differ in wattage and base configuration. The H8 draws 35W through a PGJ19-1 base, while the H7 draws 55W through a PX26d base, and the two are not interchangeable.