The Oldsmobile Cutlass Calais uses 194 bulb size for both front and rear side marker applications. The replacement chart covers 1978 through 1991 production 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 Oldsmobile Cutlass Calais uses the 194 bulb for both front and rear side marker positions across all listed model years.
The 194 is an ANSI-standardized bulb type recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical parameters shared by all compliant manufacturers.
The 194 bulb follows the T10 miniature wedge form factor, which uses a tapering plastic base in place of a metal pin or bayonet fitting, allowing it to be inserted and removed without rotation.
The 194 operates at 12 volts and draws 3.78 watts, placing it among the lower-wattage bulbs used in automotive marker lighting.
The Cutlass Calais carries the 194 specification for front side marker positions from 1978-1984 and 1988-1991.
The rear side marker positions follow the same 194 specification across the same model years, making the front and rear side marker bulbs fully interchangeable on this vehicle.
The T10 wedge base of the 194 is a widely used standard in small automotive lighting sockets, and the 194 shares this base with several other bulb types in the same family, though wattage and voltage ratings among those related types can differ.
Because the 194 is an ANSI-defined type, bulbs sold under that designation by different manufacturers are expected to meet the same electrical specifications of 12V and 3.78W.