The Ford Transit Connect side marker utilizes 12961 and 194NA bulb sizes for the exterior lighting components. Available data covers the specific range from 2010 through 2020 for the listed vehicle.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Transit Connect uses the 2825 bulb as the dominant type across its side marker positions, with this designation appearing in the front side marker for all model years from 2010-2023 and in the rear side marker for select years.
The 2825 is an ANSI-standard miniature wedge bulb of the T10 form factor, rated at 12 volts and 5 watts, and fitted with a W2.1x9.5d base.
The 194 is also an ANSI-standard T10 miniature wedge bulb rated at 12 volts, though its wattage is 3.78W, making it a lower-wattage variant within the same general bulb family as the 2825.
Although the 2825 and 194 share the T10 form factor, their wattage ratings differ, and the two types are not confirmed as interchangeable within these specifications.
The Ford Transit Connect (2017-2018) rear side marker position specifies the 194 bulb rather than the 2825, distinguishing those years from others in the rear marker application.
The rear side marker for 2014-2016 and 2019-2020 specifies the 2825 bulb, which carries a higher wattage than the 194 used in 2017-2018 for the same position.
The front side marker specification remains uniform at the 2825 bulb across the entire 2010-2023 model year range of the Transit Connect, indicating no front-position bulb changes over that span.
The W2.1x9.5d base designation on the 2825 refers to a wedge-style base with a 2.1mm wire contact width and a 9.5mm insertion depth, a standard configuration in miniature automotive lighting.