The Ford F-550 Super Duty brake light utilizes unique bulb sizes 3357, 3157, 2458, and 4157 depending on the specific production period. Available data covers the range from 1999 through 2022.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford F-550 Super Duty brake light circuit uses two distinct bulb families across its model years: the T25 wedge form factor for the primary brake lights and the T15 wedge form factor for the center high mount stop light.
The 3157 is the most frequently specified bulb in the Ford F-550 Super Duty brake light position, covering model years 1999-2016 with the exception of 2006, as well as 2020. It is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and a 7W low filament, conforming to the ANSI standard for the US and Canada.
For 2021-2022, the Ford F-550 Super Duty brake light position uses the 3357, a single-filament T25 wedge bulb rated at 12V and 27W. Because the 3357 carries only one filament, it is not a drop-in replacement for the dual-filament 3157 used in earlier model years.
The 4157, specified for the 2006 model year brake light position, shares the same T25 wedge base, 12V operating voltage, and 27W/7W dual-filament rating as the 3157. Despite these similarities, the 4157 and 3157 are distinct ANSI part numbers and are not guaranteed to be interchangeable without confirming socket and circuit compatibility.
For the 2017-2019 model years, the 3157 brake light specification carries a conditional note indicating it applies to vehicles fitted with halogen capsule headlamps. The 2020 model year lists the 3157 without any such condition.
The center high mount stop light on the Ford F-550 Super Duty transitioned from the 922 to the 912 between the 2010 and 2011 model years. Both are T15 wedge bulbs operating at 12V, but the 922 is rated at 16W while the 912 is rated at 12W, making them non-interchangeable on a wattage basis despite sharing the same physical form factor.
The 922 is specified for the center high mount stop light across model years 1999-2010, while the 912 covers 2011-2022 with the exception of 2020, for which no center high mount stop light entry is present in the specifications.
The 912 is classified as a variant of the 921 bulb. Both are T15 wedge types, though they differ in wattage, which is a relevant consideration when sourcing a substitute.
For the 2019 model year, the center high mount stop light specification for the 912 also carries the halogen capsule headlamp condition, consistent with the same conditional notation applied to the brake light position for that year.
All bulb types listed across both lighting positions conform to ANSI standards applicable in the US and Canada, and all operate on a 12V electrical system, which is standard for automotive applications in these markets.