Ford F-350 Super Duty Back Up Light Bulb Size
The Ford F-350 Super Duty back up light utilizes unique bulb sizes including WT21W, 7440, 3157, 921, 2356, 2456, 3156, and 2456. Available data covers a range from 1999 to 2023.
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
If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 2023 | WT21W | WT21W | Check Price |
| 2021-2022 | 7440 | W21W | Check Price |
| 2020 | 7440 (All Second Unit Body, Less Blind Spot Information System) | W21W | Check Price |
| 2019 | 3157 | P27/7W | Check Price |
| 2017-2018 | 7440 | W21W | Check Price |
| 2011-2016 | 921 | W16W | Check Price |
| 2010 | 2356 | 2356 | Check Price |
| 2009 | 921 | W16W | Check Price |
| 2006-2008 | 2356 | 2356 | Check Price |
| 2004-2005 | 2456 | 2456 | Check Price |
| 2002-2003 | 3156 | P27W | Check Price |
| 2001 | 2456 | 2456 | Check Price |
| 2000 | 3156 | P27W | Check Price |
| 1999 | 2456 | 2456 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| Ford OEM part. Single-filament wedge bulb (T20). Originally used in 2021+ Ford F-150, Bronco, and Maverick. 12V, 21W. | WT21W | Check Price |
| ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W. | 7440 | Check Price |
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W. | 3157 | Check Price |
| ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W. | 921 | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V. | 2356 | Check Price |
| ANSI standard (US & Canada). Festoon bulb, specialty application. 12V. | 2456 | Check Price |
| ANSI standard (US & Canada). Single-filament wedge bulb (T25). 12V, 27W. | 3156 | Check Price |