BMW ActiveHybrid 5 Back Up Light Bulb Size

BMW ActiveHybrid 5 back up light bulb uses a 921 size bulb for this model. The replacement chart covers vehicle production years spanning 2012 to 2016 with corresponding bulb size specifications.

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
2012-2016	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 5 across the 2012-2016 model years.
The 921 is an ANSI-standardized bulb type, meaning its physical and electrical characteristics conform to a defined North American specification used 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 contacts rather than by a bayonet or screw mechanism.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
The 921 is rated at 16 watts, a wattage typical of reverse light applications where a moderate level of output is required for visibility when reversing.
The T15 wedge base format is shared across a range of ANSI-coded bulbs, which means physical fitment alone does not confirm electrical compatibility. Voltage and wattage ratings must also match the socket specification before a substitute bulb is used.