BMW X1 Dome Light Bulb Size

The BMW X1 dome light requires a bulb size of 12961 for the interior lighting system. Data for the specified component covers the range from 2012 through 2022.

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
2021-2022	12961
2012-2015	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 X1 dome light uses the 12961 bulb across the 2012-2015 and 2021-2022 model years covered in these specifications.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, which refers to a tubular bulb approximately 10mm wide.
This bulb uses a W2.1x9.5d base, a wedge-type connector where the electrical contacts are formed by the glass envelope itself rather than a separate metal base, allowing it to be inserted directly into a friction-fit socket.
The 12961 operates at 12 volts and 5 watts, a low-wattage rating consistent with interior courtesy lighting applications where heat output and power draw are kept minimal.
The T10 wedge form factor is shared by a wide range of aftermarket bulbs, meaning physical fitment alone does not confirm electrical compatibility; voltage and wattage ratings require verification before substitution.
The W2.1x9.5d base designation is standardized under IEC and automotive industry conventions, so the base type can be cross-referenced against other manufacturers' bulbs that share the same socket specification.