The Toyota 4Runner outer tail light and tail light assemblies use bulb sizes 7443, 1157, and 1034, with outer tail light configurations utilizing the 7443 and 1157 sizes. The replacement chart covers vehicle production years spanning 1984 through 2013 with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The outer tail light position on the Toyota 4Runner uses three distinct bulb types across its production history: the 7443, 1157, and 1034.
The 7443 is a dual-filament wedge bulb in the T20 form factor, rated at 12V with a 21W high filament and 5W low filament, conforming to ANSI standards for the US and Canadian markets.
The 1157 and 1034 are both dual-filament bulbs sharing the BAY15d bayonet base and the same 12V, 21W/5W electrical rating, with the 1034 classified as a variant of the 1157.
The 7443 is the dominant bulb type across the outer tail light specifications, covering model years 1996-2013 in the majority of entries.
The 1157 applies to the 1990-1995 model years, while the 1034 applies to 1984-1989, reflecting a progression through three different bulb standards over the vehicle's history.
The 1996 model year carries a production date qualifier of "From 11/1995," indicating that the transition from the 1157 to the 7443 occurred partway through that model year rather than at its start.
Similarly, the 2000, 2005, and 2013 model years include "To" date qualifiers, signifying mid-year fitment boundaries that affect which bulb size is applicable depending on the vehicle's production date.
Because the 7443 uses a wedge base and the 1157 uses a BAY15d bayonet base, these two bulb types are not physically interchangeable despite sharing the same wattage ratings.
The 1034 and 1157 share the BAY15d base, but as distinct ANSI part numbers they are not guaranteed to be direct substitutes without confirming compatibility for the specific application.
For 2013 Toyota 4Runner outer tail light fitment, two separate entries exist: one specifying the 7443 with a "To 08/2013" qualifier and one without a date restriction, indicating that production date verification is necessary for that model year.