BMW 528i Map Light Bulb Size

The BMW 528i map light requires a specific bulb size identified as 12961 for proper installation and function. Available data covers a specific range of production from 2008 through 2016.

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
2008-2016	12961

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

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Additional Notes

The BMW 528i uses the 12961 bulb for the map light across all listed model years, spanning 2008-2016.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
T10 bulbs are small, wedge-shaped lamps commonly used in interior lighting applications such as map lights, dome lights, and instrument panel illumination.
The 12961 operates at 12 volts and 5 watts, which is typical for low-current interior cabin lighting.
The base type for this bulb is W2.1x9.5d, a standardized wedge base where the numbers refer to the contact width and pin spacing in millimeters.
The W2.1x9.5d base is the defining fitment factor for this bulb; substitutes must share this base type to seat correctly in the socket.
Because the 12961 designation is a Philips-specific part number, equivalent bulbs from other manufacturers are identified by cross-referencing the T10 form factor and W2.1x9.5d base rather than the part number alone.