Chevrolet Vega front and rear side marker bulbs utilize a 194 bulb size across both positions. The replacement chart covers 1971 through 1977 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 Chevrolet Vega uses the 194 bulb for both its front and rear side marker positions across the 1971-1977 model years.
The 194 is an ANSI-standardized bulb recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared by multiple manufacturers.
The 194 bulb operates at 12 volts with a power draw of 3.78 watts, placing it in the low-wattage range typical of marker and courtesy lighting applications.
It uses a T10 miniature wedge base, a baseless construction where the glass envelope itself is pinched and shaped to friction-fit directly into a compatible socket without requiring a separate metal base.
Because the same 194 bulb serves all four side marker positions on the Vega, a single bulb type covers the full side marker lighting system of the vehicle.
The T10 wedge format is not compatible with bayonet or screw-base sockets, so socket type must be confirmed before substitution with physically similar bulbs of a different base style.
While the 194 shares its T10 wedge base with several other bulb numbers, wattage and voltage ratings differ across those variants, and substituting a higher-wattage wedge bulb into a socket rated for 3.78 watts risks exceeding the thermal tolerance of the socket housing.