The Subaru Loyale brake light utilizes a 1157 bulb size for illumination across all recorded vehicle applications. Data for the specific lighting component covers the range from 1990 to 1994.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Subaru Loyale uses the 1157 bulb for its brake lights across the 1990-1994 model years.
The 1157 is a dual-filament bulb rated at 12V with a 21W/5W output, meaning its two filaments serve different functions at different wattages within the same housing.
The 1157 uses a BAY15d bayonet base, which features two offset pins at different heights to prevent incorrect installation of a single-filament bulb in a dual-filament socket.
The center high mount stop light on the Subaru Loyale takes the 1156 bulb across the same 1990-1994 model years.
The 1156 is a single-filament bulb rated at 12V and 21W, with a BA15s bayonet base that uses two pins at equal heights.
Although the 1157 and 1156 share a similar physical profile and both use bayonet-style bases, their pin configurations differ, and the two bulb types are not interchangeable.
Substituting a 1156 into a 1157 socket would eliminate one filament's function, which in a brake light application would result in the loss of either the running light or the stop light signal.
Both the 1157 and 1156 conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical tolerances across manufacturers.