Audi Q5 Sportback Back Up Light Bulb Size

Additional Notes

• The Audi Q5 Sportback uses the 921 bulb for its back up light across the 2021-2024 model years, with the exception that 2022 is not represented in the specifications.
• The 921 is a wedge-style bulb, classified under the T15 designation, which refers to its tubular glass envelope measuring 15 eighths of an inch in width.
• The 921 operates at 12 volts and draws 16 watts, placing it in the range typical of incandescent reverse lighting applications.
• The 921 follows the ANSI standard, meaning it conforms to a specification recognized across the United States and Canada, which governs its electrical and physical characteristics.
• The wedge base design of the 921 means it lacks a traditional metal contact pin and instead relies on the tapered base itself to make electrical contact within the socket, a construction that differs from bayonet or festoon bulb types.