The Oldsmobile 88 brake light uses bulb sizes 2057, 1034, and 1154 according to the provided data. Information covers the span from 1950 through 1999 for the specified vehicle components.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Oldsmobile 88 uses the 2057 bulb as its brake light across the 1992-1999 model years, making it the most consistently specified bulb in these brake light specifications.
The 2057 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a high/low wattage split of 26.9W and 8W, and it is classified as a brighter variant of the widely used 1157.
The center high mount stop light on the Oldsmobile 88 for 1992-1999 uses the 1156 bulb, which is a single-filament type with a BA15s bayonet base rated at 12V and 21W.
Because the 1156 uses a BA15s single-contact base and the 2057 uses a BAY15d dual-contact base, these two bulbs are not interchangeable despite both being 12V bayonet-style fittings.
The 1034 bulb is specified for the Oldsmobile 88 brake lights across the 1954-1957 model years. It is also a dual-filament BAY15d bulb and a variant of the 1157, rated at 12V with a 21W/5W wattage split.
The 1154 bulb is specified for the 1950 Oldsmobile 88 brake light. It is a dual-filament bulb with a BAY15d bayonet base and is noted as an older variant of the 1157, rated for operation at either 6V or 12V.
The dual-voltage rating of the 1154 reflects the transitional period in automotive electrical systems during the early 1950s, when 6-volt systems were being phased out in favor of 12-volt systems.
The 2057 and 1034 share the same BAY15d base type, but their wattage ratings differ. The 2057 draws 26.9W on its high filament while the 1034 draws 21W, meaning they are not direct substitutes despite physical base compatibility.
All four bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada.
The BAY15d base found on the 2057, 1034, and 1154 bulbs features two offset pins that prevent incorrect single-filament bulbs from being seated in dual-filament sockets.