The Subaru 1400 uses H6024 bulb size for both high beam and low beam headlight applications. Replacement chart data covers 1973 to 1974 vehicle production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H6024 is the sole bulb type listed across all headlight positions for the Subaru 1400, covering both the high beam and low beam functions for the 1973-1974 model years.
The H6024 is a 7-inch round sealed beam unit operating at 12 volts. It conforms to ANSI standards applicable in the United States and Canada.
A sealed beam unit differs from a conventional bulb in that the filament, reflector, and lens are fused into a single assembly. When the filament fails, the entire unit is replaced rather than an internal bulb.
The H6024 serves dual headlight positions on the Subaru 1400, functioning as both the high beam and low beam unit. This indicates a single-filament or shared sealed beam arrangement rather than separate dedicated assemblies for each function.
Because the H6024 is a sealed beam type, fitment is governed by the physical housing standard rather than a socket or base type. Compatibility depends on the 7-inch round form factor conforming to the ANSI specification.