Mobility Ventures MV-1 Back Up Light Bulb Size

The Mobility Ventures MV-1 back up light requires 1156 or P21W bulb sizes depending on the specific production requirements for the vehicle. Data for the bulb sizes covers the range from 2014 through 2017.

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
2014-2017	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 Mobility Ventures MV-1 uses the 1156 bulb for the back up light position across the 2014-2017 model years.
The 1156 is an ANSI-standardized bulb type, meaning its physical and electrical specifications are governed by a recognized North American standard shared across the United States and Canada.
The 1156 operates on a 12-volt circuit and draws 21 watts, which is consistent with standard automotive incandescent back up light applications.
The bulb uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, as opposed to the dual-pin BA15d variant. These two base types are not interchangeable despite sharing the same 15mm collar width.
The 1156 is a single-filament bulb, meaning it serves only one lighting function. This distinguishes it from visually similar bulbs such as the 1157, which carries a dual filament for combined stop and tail functions and is not a compatible substitute in this application.