The Toyota Tundra brake light components utilize 3157, 2458, and 7443 bulb sizes depending on the specific version of the vehicle. Data for the provided bulb sizes covers the range from 2000 to 2021.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota Tundra brake lighting system draws from three bulb types across its model years: the 3157, 7443, and 921, all of which conform to ANSI standards recognized in the United States and Canada.
The 3157 is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and a 7W low filament, making it suitable for combined brake and running light functions within a single housing.
The 7443 is a dual-filament T20 wedge bulb rated at 12V with a 21W high filament and a 5W low filament. Although it shares the dual-filament design of the 3157, the two types are not interchangeable due to differences in their wedge base sizes.
The 921 is a single-filament T15 wedge bulb rated at 12V and 16W. It is specified for the Center High Mount Stop Light across all model years from 2000-2021 without variation.
The 3157 is the dominant brake bulb across the Tundra's brake light positions, appearing in the standard brake position for most years from 2000-2021, with the exception of 2005 and 2006, which use the 7443.
In the Outer Brake position, the 2007 model year carries a production date qualifier: units built from November 2006 onward use the 3157, while 2006 units built through December 2006 also use the 3157, indicating a mid-cycle transition away from the 7443 used in 2005.
The 2003 Outer Brake position specifies the 3157 with a fitment note restricting it to vehicles with a standard deck configuration, indicating that alternative bed configurations may require a different specification.
Because the T25 (3157) and T20 (7443) wedge bases differ in physical size, substituting one for the other in a given socket is not supported by these specifications, and the correct bulb type is determined by the model year and specific light position.