Audi Q5 Headlight Bulb Size

Additional Notes

• The D3S bulb is the most frequently specified type across the Audi Q5 headlight data, appearing in both high beam and low beam positions for model years 2009-2018. It is a mercury-free HID xenon discharge bulb operating at 42V and 35W, built to ECE standards, and incorporates an integral ignitor designed for projector-type housings.
• The D5S is a low-voltage compact HID xenon bulb operating at 12V and 25W with a PK32d-7 base. It is specified for low beam use on the Audi Q5 across 2019, 2021, and 2023-2024, and also appears as a high beam option for 2019 and 2023-2024.
• For model years 2009-2014, the Audi Q5 carried dual fitment entries for both high beam and low beam positions, listing either a D3S for HID-equipped vehicles or an H7 for halogen capsule headlamp variants. These two bulb types are not interchangeable, as they use different base types, operating voltages, and ignition systems.
• The H7 bulb uses a PX26d base and operates at 12V and 55W under ECE standards, with approval also extended to the US and Japan. On the Q5, it served halogen capsule headlamp configurations from 2009-2014 in both beam positions.
• The H8 bulb operates at 12V and 35W with a PGJ19-1 base under ECE standards and carries US approval. It is specified as the high beam bulb for the Q5 in 2018, 2020, and 2021, and also appears in 2019 for halogen and gas discharge headlamp systems using the D5/D7 platform.
• The 9006 bulb is an ANSI-standard single-filament halogen type with a P22d base, rated at 12V and 55W. It is specified exclusively for the high beam position on the 2023-2024 Q5 and is not listed for any low beam application in these specifications.
• The 2019 Audi Q5 high beam position lists both a D5S for HID headlamp configurations and an H8 for halogen and gas discharge systems using the D5/D7 designation. These represent distinct headlamp system variants requiring different bulb types that are not substitutable for one another.
• The 2018 Audi Q5 high beam position lists both a D3S for HID configurations and an H8 for non-HID configurations, while the low beam position lists only the D3S. This indicates that the high beam bulb type varies by headlamp system on that model year, whereas the low beam does not carry a halogen alternative for 2018.
• D3S and D5S bulbs both fall under the HID xenon category but are electrically and physically distinct. The D3S operates at 42V and 35W with a PK32d-5 base, while the D5S operates at 12V and 25W with a PK32d-7 base. The two types are not interchangeable despite sharing a similar naming convention.
• Halogen bulbs specified across the Q5 range, including the H7, H8, and 9006, all operate at 12V but differ in wattage and base type. The H7 and 9006 are both rated at 55W, while the H8 is rated at 35W. Each uses a distinct base fitting, making cross-substitution between them physically incompatible without modification.