Audi SQ5 Back Up Light Bulb Size

Additional Notes

• The 921 bulb is the sole backup light bulb size listed across all Audi SQ5 model years in these specifications, spanning 2014-2024.
• The 921 is an ANSI-standardized bulb type recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical standards shared across many vehicle manufacturers.
• The 921 uses a wedge-style base, designated T15, which refers to a tubular bulb body approximately 15mm wide that is held in its socket by friction rather than by pins or a bayonet lock.
• The bulb operates at 12 volts and draws 16 watts, which is consistent with standard automotive electrical systems.
• For the 2020 Audi SQ5, the specifications note that the 921 bulb applies specifically to the bumper-mounted backup light position, distinguishing it from other potential light locations on that model year.
• The T15 wedge base format is widely used across the automotive industry, which generally makes the 921 interchangeable with other bulbs sharing the same base type, provided voltage and wattage ratings are also compatible.
• Because the 921 is an ANSI-rated bulb, aftermarket and OEM replacements labeled 921 are expected to meet the same output and electrical characteristics as the original specification.