Ford Ranger Tail Light Bulb Size

Additional Notes

• The Ford Ranger tail light specifications cover model years 1983 through 2023, with four distinct bulb types used across that span: the 1157, 3157, 4157, and 7443.
• The 3157 is the most frequently specified tail light bulb across the Ford Ranger lineup, covering model years 1991 through 2004 as well as 2019, making it the dominant fitment across the vehicle's history.
• The 7443 is a dual-filament T20 wedge bulb rated at 12V with a 21W high-filament and 5W low-filament output, and it is specified for the Ford Ranger for model years 2021-2023.
• The 3157 is a dual-filament T25 wedge bulb rated at 12V with a 27W high-filament and 7W low-filament output, which represents a higher wattage output than the 7443 despite both being dual-filament designs.
• The 4157 shares the same T25 wedge base, voltage rating, and wattage as the 3157, though the two carry different ANSI designations and are not interchangeable without verification.
• The 1157 differs from the other three bulb types in its base design, using a BAY15d bayonet mount rather than a wedge base, which makes it physically incompatible with sockets designed for T20 or T25 wedge bulbs. It was specified for the Ford Ranger for model years 1983-1990.
• The Ford Ranger (2020) with halogen capsule headlamps uses the 3157 bulb, indicating that headlamp configuration is a relevant fitment variable for that model year.
• The 7443 and 1157 share the same 21W/5W power rating despite having different base types, meaning their light output is equivalent while their physical installation requirements are not.