Acura RDX License Plate Bulb Size

The Acura RDX license plate light requires a 168 bulb size for proper illumination of the rear vehicle area. Available data covers the production range from 2007 through 2018.

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	Bulb Size
2007-2018	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The Acura RDX uses the 168 bulb size for the license plate position across all listed model years from 2007-2018.
The 168 bulb is classified as a miniature wedge type, designated T10, which refers to its tubular wedge-base form factor measuring 10 millimeters in width.
The T10 wedge base design means the bulb is held in place by friction from its plastic base rather than by a separate metal socket with pins, which is a common trait of license plate and interior lighting applications.
The 168 bulb operates at 12 volts and consumes 4.9 watts, placing it in the low-wattage category typical of auxiliary lighting rather than primary illumination.
The 168 designation follows the ANSI standard recognized in both the United States and Canada, meaning the specification conforms to a defined interindustry standard for bulb geometry and electrical ratings.
The T10 wedge family includes several closely related bulb numbers, such as the 194 and 147, which share the same base type but differ in wattage. The 168 at 4.9 watts is not identical to these variants, and substitution without confirming wattage compatibility may affect socket fit or circuit load.
Because the 168 bulb is an ANSI-standardized part, aftermarket and OEM replacements from different manufacturers are generally expected to share the same base and electrical ratings, provided they carry the same ANSI designation.