Audi Q5 Back Up Light Bulb Size

The Audi Q5 back up light utilizes a 921 bulb size for illumination purposes within the rear lighting assembly. Provided information covers a span of time starting from 2009 and ending in 2024.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	US Type	EU Type	Shop
2023-2024	921	W16W	Check Price
2009-2021	921	W16W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921	Check Price

Other Locations

Additional Notes

The Audi Q5 uses the 921 bulb for the back up light position across all listed model years, spanning 2009-2024.
The 921 is a wedge-type bulb, designated T15, which refers to its tubular glass envelope with a wedge base that connects directly to the socket without a separate metal base or pins.
The 921 operates at 12 volts and 16 watts, placing it in the mid-range output category for incandescent reverse lighting applications.
The 921 carries ANSI standardization, meaning its physical and electrical characteristics are defined by a recognized North American standard applicable in both the United States and Canada.
Because the 921 is an ANSI-standardized wedge bulb, it is interchangeable with other bulbs sharing the T15 wedge base and the same voltage and wattage ratings, provided the replacement meets those electrical specifications.