Bering MD23M Back Up Light Bulb Size

The Bering MD23M back up light requires 1156 and P21W bulb sizes for the lighting systems. Data for the specific bulbs covers the range from 1999 to 2000.

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
1999-2000	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The 1156 is the bulb type specified for the Bering MD23M backup light across both listed model years, 1999-2000.
The 1156 is an ANSI-standardized bulb used in the United States and Canada, operating at 12 volts with a 21-watt output.
As a single-filament bulb, the 1156 serves functions requiring only one circuit, such as backup lighting, rather than dual-function applications like combined brake and tail lighting.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a bayonet fitting with a 15mm base width and a single contact pin, which determines physical socket compatibility.