Ford Ranger front and rear side marker bulbs utilize 194, 194NA, 3157, and 7443 bulb sizes across different model generations. The replacement chart covers 41 years of vehicle production data from 1983 to 2023.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Ranger front side marker uses the 194 bulb across the majority of its model years, including 1983-1993, 2001-2004, and 2019-2023.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W, classified under the ANSI standard for the US and Canadian markets.
The 194NA bulb, fitted to the Ford Ranger front side marker for 2008-2011, shares the same T10 wedge form, voltage, and wattage as the standard 194, but features natural amber-tinted glass rather than a clear envelope.
Because the 194NA produces its amber output through tinted glass rather than a colored lens, substituting a clear 194 in its place may alter the visible color of the marker light.
The 3157 is a T25 dual-filament wedge bulb rated at 12V with a high filament of 27W and a low filament of 7W, making it physically and electrically distinct from the T10 194 family.
The Ford Ranger front side marker used the 3157 for model years 1994-2000, representing a departure from the T10 wedge format used in surrounding years.
The 3157 and 194 are not interchangeable due to differences in bulb base size, filament count, and wattage, so cross-year substitution between these two types is not supported by the specifications.
The rear side marker on the 2023 Ford Ranger specifies the 7443 bulb, a T20 dual-filament wedge rated at 12V with filaments of 21W and 5W, and its fitment is conditional on the presence of a Type 1 lamp configuration.
The 3157 appears in the rear side marker position for model years 1993 and 1998-2003, making it the most recurring bulb type across both front and rear marker positions in the Ranger's history.
Although the 3157 and 7443 are both dual-filament wedge bulbs, they differ in base size and wattage ratings and are not interchangeable with each other or with the T10 194 family.