The Oldsmobile Calais front and rear side marker bulbs both utilize a 194 size bulb for proper illumination. The replacement chart covers 1985 to 1987 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 sole side marker bulb type listed for the Oldsmobile Calais across all documented model years and positions in these specifications.
The 194 bulb follows the ANSI standard recognized in both the United States and Canada, placing it within a regulated and widely adopted specification framework for miniature automotive lighting.
It is a T10 miniature wedge bulb, a form factor that uses a wedge-shaped base rather than a metal contact pin, allowing it to seat directly into a compatible socket without a separate holder.
The 194 operates at 12 volts, consistent with the standard electrical system voltage found in conventional passenger vehicles of that era.
Its rated wattage of 3.78W places it in the low-power range, typical of side marker applications where continuous illumination is required without significant heat or current draw.
Both the front and rear side marker positions on the Calais share the same 194 bulb size for the 1985-1987 model years, meaning a single bulb type serves all four side marker sockets on the vehicle.
The T10 wedge base is a common fitment standard, and 194-type bulbs are produced by numerous manufacturers, though socket compatibility depends on the physical housing rather than the bulb designation alone.
Because the front and rear sockets use the same bulb specification, cross-installation between positions is electrically consistent, though lens color and housing orientation remain position-specific by design.