BMW M4 Back Up Light Bulb Size

The BMW M4 back up light requires a bulb size of 12177 for the rear lighting assembly. Data for the specified component covers the range from 2015 to 2018.

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
2015-2018	12177

Bulb Specifications

Description	Bulb Size
Philips part number. Halogen bulb, specialty application. 12V.	12177

Other Locations

Additional Notes

The BMW M4 uses the 12177 bulb for the back up light across the 2015-2018 model years.
The 12177 is a Philips part number designating a halogen bulb rated at 12 volts for specialty automotive applications.
Halogen bulbs in specialty applications, such as the 12177, are typically designed for precise optical housings where standard replacement sizes would not fit correctly, making exact part number matching important for proper fitment.
The consistent use of a single bulb size across all four model years of the BMW M4 in this range indicates no mid-cycle changes were made to the back up light bulb specification during that period.