BMW 650i Gran Coupe Map Light Bulb Size

The BMW 650i Gran Coupe map light utilizes a specific bulb size identified as 12961 for the interior lighting system. Provided information covers the production range from 2013 through 2019.

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
2013-2019	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 650i Gran Coupe uses the 12961 bulb for the map light across all available model years, spanning 2013-2019.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
T10 refers to the bulb's tubular shape, with the number indicating a width of 10 millimeters.
The 12961 uses a W2.1x9.5d wedge base, which is a pinless base type that is held in place by the socket walls rather than by pins or a bayonet mechanism.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
The 12961 carries a 5-watt rating, placing it in the low-wattage range typical of interior courtesy and reading lamp applications.
The W2.1x9.5d base designation is a standardized IEC specification, meaning fitment compatibility is determined by this base type rather than by brand alone.
Substituting a bulb with a different base type, such as a festoon or bayonet base, would be incompatible with the socket design of the BMW 650i Gran Coupe map light.