The Oldsmobile Firenza front and rear side marker bulb size is 194, a standardized replacement bulb used across both locations on the vehicle. The replacement chart covers 1982 to 1988 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 Oldsmobile Firenza uses the 194 bulb for both front and rear side marker positions across all model years covered in the specifications, spanning 1982-1988.
The 194 is classified as a miniature wedge bulb, designated T10 in the international bulb sizing system. The T10 designation refers to the tubular glass envelope width, measured in eighths of an inch.
A wedge base bulb relies on the tension of its flattened glass base to make electrical contact within the socket, rather than using a metal bayonet or screw fitting. This base type is common in low-current automotive marker and interior lighting applications.
The 194 bulb operates at 12 volts and draws 3.78 watts, placing it in the low-wattage range typical of side marker lighting, where continuous illumination is required without significant heat generation.
The 194 bulb conforms to ANSI standards recognized in both the United States and Canada, indicating a standardized specification for physical and electrical characteristics across manufacturers.
Because the front and rear side marker positions on the Firenza share the same bulb size, a single 194 bulb serves as a direct replacement for either location on the vehicle.
The 194 bulb belongs to a family of miniature wedge bulbs that includes closely related types such as the 168 and 192. These variants differ in wattage and are not always interchangeable, even when they share the same T10 wedge base form factor.