The Oldsmobile Toronado front side marker uses 194NA, 194, or 1157NA bulb sizes, while the rear side marker requires 24 or 194 bulb sizes. The replacement chart covers 1968 through 1992 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 194 bulb is the most widely used type across the Oldsmobile Toronado side marker specifications, appearing in both front and rear positions across the majority of model years covered.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W, conforming to the ANSI standard for the US and Canadian markets.
The 194NA shares the same T10 wedge form factor, voltage, and wattage as the standard 194, but its glass envelope is tinted amber at the factory rather than clear.
The Oldsmobile Toronado front side marker uses the 194NA for the 1990-1992 model years, meaning the amber color is produced by the bulb itself rather than a colored lens or housing filter.
Front side marker fitment for 1980-1989 uses the clear 194, while the 1990-1992 transition to the 194NA indicates a housing design change where the lens no longer provides the amber tint independently.
Substituting a clear 194 for a 194NA in a 1990-1992 front side marker position would produce white light output rather than amber, which may not meet the original optical specification of that housing.
The 1979 front side marker on the Toronado uses the 1157NA, a dual-filament BAY15d bayonet-base bulb rated at 12V with a 21W main filament and a 5W secondary filament, making it electrically and physically incompatible with the T10 wedge socket used in all other front side marker years.
The rear side marker transitions from the 194 (used from 1968-1989) to the 24 bulb for 1990-1992, representing a socket and base change that makes these two bulb types non-interchangeable.
The 24 bulb uses a BA9s single-contact bayonet base and is rated at 12V and 2W, which is a lower wattage output than the 194 it replaced in the rear side marker position.
Because the 1157NA uses a BAY15d bayonet base and the surrounding model years use a T10 wedge socket, the 1979 front side marker housing is not interchangeable with those from adjacent years without a socket adapter or housing replacement.