BMW X1 Trunk Bulb Size

The BMW X1 trunk light requires a bulb with the unique size 12961 for proper illumination. Data for the specific component covers the range from 2021 to 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 Type	Shop
2021-2022	12961	Check Price

Bulb Specifications

Description	Type	Shop
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961	Check Price

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Additional Notes

The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor. It uses a W2.1x9.5d base, which is the standard wedge-style base that requires no rotation during installation, relying instead on friction to hold the bulb in place.
The bulb operates at 12 volts and 5 watts, placing it in the low-wattage range typical of interior and cargo area lighting, where heat output and power draw are kept minimal.
The BMW X1 uses the 12961 bulb for trunk illumination across the 2021-2022 model years.
The T10 form factor is one of the most widely produced miniature bulb sizes in the automotive industry, and the W2.1x9.5d base is shared across many interior lighting applications. However, physical fitment in the socket does not guarantee electrical or optical compatibility with a specific vehicle position, so substitutions warrant verification against the original specification.