BMW 760Li Back Up Light Bulb Size

The BMW 760Li back up light utilizes a 921 bulb size for illumination purposes. Available data for the specified component covers the period from 2003 through 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
2010-2015	921
2003-2008	921

Bulb Specifications

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

Other Locations

Additional Notes

The BMW 760Li uses the 921 bulb size for the back up light across the 2003-2008 and 2010-2015 model years.
The 921 is a wedge-type bulb, classified under the T15 designation, which refers to its tubular glass envelope measuring 15/8 inches in width.
Wedge bulbs do not use a separate metal base or pins. Instead, the glass envelope itself is pinched at the bottom to form a wedge shape that locks directly into the socket.
The 921 operates at 12 volts and draws 16 watts, which is consistent with standard automotive reverse light applications.
The 921 bulb conforms to ANSI standards, meaning its physical and electrical specifications are regulated for consistency across manufacturers in the United States and Canada.
Because the 921 is an ANSI-standardized wedge bulb, it is interchangeable with other bulbs sharing the same T15 wedge base and compatible voltage and wattage ratings, provided the replacement meets the original electrical specifications.
Substituting a bulb with a higher wattage than the rated 16W risks overloading the socket or wiring, as the circuit in the BMW 760Li is designed around the original load.