BMW ActiveHybrid 7 Back Up Light Bulb Size

The BMW ActiveHybrid 7 back up light uses a 921 bulb size for this lighting component. The replacement chart covers vehicle production years spanning 2013 to 2015.

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
2013-2015	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 BMW ActiveHybrid 7 across the 2013-2015 model years.
The 921 is classified as an ANSI-standard bulb recognized in both the United States and Canada, meaning it conforms to a standardized specification used across a wide range of North American automotive applications.
The 921 uses a wedge-style base, designated T15, which refers to a tubular bulb body approximately 15 eighths of an inch wide. This base type is inserted directly into a socket without a separate metal base or pins.
The 921 operates at 12 volts and draws 16 watts, which is consistent with standard automotive electrical systems.
Because the 921 is an ANSI-standardized wedge bulb, it is shared across many vehicle makes and models, which generally makes replacement units widely available. However, fitment should be confirmed against the T15 wedge socket type before installation in the BMW ActiveHybrid 7.