BMW Alpina B7 Map Light Bulb Size

The BMW Alpina B7 map light requires a 12961 bulb size for proper installation and function within the interior lighting system. Available data for the specified component covers the range from 2007 to 2015.

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
2011-2015	12961
2007-2008	12961

Bulb Specifications

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

Other Locations

Additional Notes

The BMW Alpina B7 uses the 12961 bulb across all listed model years for the map light position.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor with a W2.1x9.5d base.
The T10 designation refers to a tubular bulb approximately 10mm wide, commonly found in interior lighting applications such as map lights, dome lights, and courtesy lights.
The W2.1x9.5d base specification describes a wedge-type connection where the bulb pins directly into a socket without a separate metal base, with a 9.5mm pin spacing and 2.1mm wire diameter.
The 12961 operates at 12 volts and 5 watts, which is standard for low-current interior lighting in passenger vehicles.
The BMW Alpina B7 map light fitment covers the 2007-2008 and 2011-2015 model years under this single bulb specification.
The W2.1x9.5d base type is not universally interchangeable with other wedge base standards, such as the W2.1x9.5d variants differing in pin spread, so socket compatibility warrants attention when substituting with non-OEM bulbs.
Because the 12961 is a Philips-assigned part number, equivalent bulbs from other manufacturers must match the T10 form factor, W2.1x9.5d base, 12V rating, and 5W rating to serve as direct replacements.