Pontiac Astre front and rear side marker bulbs utilize a 194 bulb size for all applications. The replacement chart covers 1975 to 1977 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 bulb type across all side marker positions listed for the Pontiac Astre.
The 194 is classified as a miniature wedge bulb under the T10 form factor, which describes its tubular shape and 10mm wedge base width.
It operates at 12 volts with a power draw of 3.78 watts, placing it in the low-wattage category typical of marker and courtesy lighting applications.
The 194 carries ANSI standardization recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical tolerances shared across manufacturers.
The wedge base design of the T10 format means the bulb is held in its socket by the tension of the base contacts rather than by a bayonet or screw mechanism.
The front side marker position on the Pontiac Astre used the 194 bulb across the 1975-1977 model years.
The rear side marker position carried the same 194 specification for the 1976-1977 model years.
Because the front and rear side marker positions share the same bulb type, a single 194 bulb serves both locations without substitution or adaptation.