Toyota Land Cruiser Tail Light Bulb Size

Additional Notes

• The Toyota Land Cruiser outer tail light specifications cover two distinct bulb types across the full model range: the 7443 and the 1157, both of which are dual-filament bulbs rated at 12V with a 21W high-filament and 5W low-filament output. This dual-filament configuration allows a single bulb to serve both braking and running light functions simultaneously.
• The 7443 is a T20 wedge-base bulb conforming to ANSI standards for the US and Canadian markets. Its wedge-base design means it is retained by socket tension alone, without a locking mechanism, which distinguishes it physically from bayonet-style bulbs.
• The 1157 uses a BAY15d bayonet base, a two-pin offset-pin fitting that locks into the socket with a twist. Despite sharing the same 12V, 21W/5W electrical rating as the 7443, the two bulbs are not interchangeable due to their entirely different base types.
• The 1034 also uses a BAY15d bayonet base and is specified in the data as a variant of the 1157. While the base type is the same, the 1034 and 1157 are not confirmed as direct substitutes for one another within these specifications, and fitment should be treated according to the year-specific data provided.
• The Toyota Land Cruiser outer tail light transitioned from the 1034 to the 1157 between the 1974 and 1975 model years, based on the specifications. Both bulbs share the BAY15d base, but the 1034 is a distinct part number and should not be assumed to be a drop-in replacement for the 1157 without verification.
• A further transition occurred between the 1997 and 1998 model years, when the outer tail light specification changed from the 1157 to the 7443. Because these two bulbs use fundamentally different base types, a BAY15d bayonet socket and a T20 wedge socket are not compatible, making cross-year substitution between these two bulb types impossible without socket modification.
• The 1998 model year outer tail light carries a production date qualifier of "From 01/1998," while the 2005 model year carries a qualifier of "To 05/2005." These date restrictions indicate that not all units within those model years share the same specification, and production date of the specific vehicle is relevant to confirming the correct bulb.