Ford Transit Stepwell Bulb Size

The Ford Transit stepwell bulb uses a 12961 size designation for this component. The replacement chart covers 2020 to 2023 vehicle production specifications.

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
2023	12961	Check Price
2020	12961 (From 10/21/2019)	Check Price

Bulb Specifications

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

Other Locations

Additional Notes

The 12961 is a Philips miniature wedge bulb in the T10 form factor, using a W2.1x9.5d base. It operates at 12 volts with a 5-watt output, placing it in the low-power category typical of interior and courtesy lighting applications.
The W2.1x9.5d base designation refers to a wedge-style connection with a 2.1mm wire width and a 9.5mm insertion depth. This base type is not compatible with bayonet or festoon sockets, making socket type a critical factor in replacement.
The Ford Transit uses the 12961 bulb for the stepwell position across the 2020 and 2023 model years.
The 2020 Ford Transit stepwell fitment carries a production date qualifier, applying specifically to vehicles built from October 21, 2019 onward. Vehicles produced before that date may not share the same specification.