The Ford Fusion side marker uses 168, 168NA, and 194 bulb sizes according to the provided specifications for the lighting components. The available data covers the range from 2010 through 2012 for the specified vehicle.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Fusion uses the 168 bulb across all front side marker positions for the 2006-2012 model years, making it the most consistently specified bulb in these listings.
The 168 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W.
The 194 bulb shares the same T10 wedge form factor as the 168 but draws less power at 3.78W versus 4.9W, which reflects a lower wattage rating despite the physical similarity.
Although the 168 and 194 share the T10 form factor, they carry different ANSI designations and wattage ratings, which means they are not confirmed interchangeable within these specifications.
The Ford Fusion front side marker position specifies the 168 bulb regardless of whether the vehicle is equipped with HID headlamps, covering model years 2010-2012 where that trim distinction is noted.
The rear side marker of the Ford Fusion transitioned from the 194 bulb (2006-2009) to the 7443 bulb (2010-2012), representing a change in both bulb type and wattage for that position.
The 7443 is a dual-filament T20 wedge bulb rated at 12V with a 21W high filament and a 5W low filament, which is a notably higher wattage output than either the 168 or 194.
The dual-filament design of the 7443 allows it to serve two lighting functions within a single bulb, which distinguishes it from the single-filament 168 and 194 types used elsewhere in these specifications.
All three bulb types listed, the 168, 7443, and 194, conform to ANSI standards applicable in both the United States and Canada.
The 7443 uses a T20 wedge base, which is physically larger than the T10 base of the 168 and 194, making the rear side marker socket on 2010-2012 Ford Fusion models incompatible with the smaller T10 bulbs used in earlier model years.