Toyota Land Cruiser Brake Bulb Size

Additional Notes

• The 7443 is a dual-filament wedge bulb of the T20 type, rated at 12V with a 21W high-filament and 5W low-filament output. Its wedge base design differs from the bayonet-style fittings used in older bulb types, meaning it is not physically interchangeable with BAY15d-based bulbs.
• The 1157 and 1034 both use the BAY15d bayonet base and share the same 12V, 21W/5W dual-filament configuration. The 1034 is classified as a variant of the 1157, though the two are not confirmed as drop-in replacements for one another without verifying socket and filament offset compatibility.
• All three bulb types listed across these specifications carry ANSI standard designations applicable to the US and Canadian markets.
• The Toyota Land Cruiser transitioned from the 1034 to the 1157 between the 1974 and 1975 model years for the brake bulb position, representing a shift between two related but distinct BAY15d variants.
• A second transition occurred between the 1997 and 1998 model years, when the brake bulb specification changed from the BAY15d-based 1157 to the wedge-type 7443, reflecting a change in socket architecture that makes the two groups mutually incompatible.
• For the Outer Brake sub-position, the 1998 model year carries a production date qualifier, with the 7443 specification applying from January 1998 onward. The 2005 model year for the same position is noted as applicable through May 2005.
• The dual-filament design of all three bulb types serves two functions within a single housing: the higher-wattage filament activates under braking, while the lower-wattage filament operates as a running or parking light.