Toyota 4Runner brake bulb specifications include 7443, 1157, and 1034 sizes for standard brake applications, with 921 size for the center high mount stop light and 7443 or 1157 sizes for outer brake positions. The replacement chart covers vehicle production years from 1984 through 2013 with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota 4Runner brake bulb specifications cover three distinct bulb types across the listed model years: the 7443, 1157, and 1034 for standard brake positions, and the 921 for the Center High Mount Stop Light.
The 7443 is a dual-filament wedge bulb in the T20 form factor, rated at 12V with a 21W high-intensity filament and a 5W running filament, conforming to ANSI standards for the US and Canadian markets.
The 1157 shares the same 12V, 21W/5W dual-filament output as the 7443 but uses a BAY15d bayonet base rather than a wedge-style connection, making the two bulbs electrically similar yet physically incompatible without an adapter.
The 1034 is a BAY15d bayonet-base dual-filament bulb and a variant of the 1157, also rated at 12V, 21W/5W. Despite the shared base type and wattage, the 1034 and 1157 are distinct ANSI designations and are not directly interchangeable.
The 921 is a single-filament T15 wedge bulb rated at 12V, 16W, and is used exclusively in the Center High Mount Stop Light position. Its single-filament design reflects the dedicated on/off function of a high-mount stop light, which requires no separate running-light filament.
The Toyota 4Runner (1996-2013) uses the 7443 wedge bulb for standard brake lighting, representing the most widely specified bulb across the listed model years in these specifications.
The Outer Brake sub-part for the 1996 model year carries a production date qualifier of "From 11/1995," indicating that the 7443 fitment applies only to units produced from that date onward within the model year, while the 1995 model year in the same sub-part specifies the 1157.
Similarly, the 2013 Outer Brake entry is qualified as "To 08/2013," and the 2005 and 2000 entries carry equivalent mid-year cutoffs, indicating that bulb fitment within a single model year can vary depending on production date.
The Center High Mount Stop Light specifications cover model years 1993-2009, with the 921 bulb specified uniformly across all listed years in that position.
The standard brake position for model years 1984-1989 specifies the 1034, while 1990-1995 specifies the 1157. Both use the BAY15d bayonet base, but substituting one for the other is not supported by these specifications due to their distinct ANSI designations.