Ford Taurus X Back Up Light Bulb Size

The Ford Taurus X back up light requires a bulb size of 921 for the rear lighting assembly. Data for the specified vehicle covers the range from 2008 to 2009.

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
2008-2009	921

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921

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Additional Notes

The 921 bulb is the specified back up light bulb size for the Ford Taurus X across both available model years, 2008-2009.
The 921 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 921 uses a wedge-style base, designated T15, which refers to a tubular bulb body approximately 15 eighths of an inch wide that is held in its socket by the tension of the base itself rather than by a bayonet or screw fitting.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in conventional passenger vehicles.
The 921 is rated at 16 watts, a power level typical of incandescent reverse light applications.
Because the 921 follows an ANSI standard, bulbs carrying that designation from different manufacturers are generally interchangeable, provided the T15 wedge base and 12V/16W ratings are met.