Saturn Aura front side marker bulbs use a 194 size, while rear side marker bulbs use a 192 size. The replacement chart covers 2007 through 2009 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 Saturn Aura uses the 194 bulb for the front side marker position across the 2007-2009 model years.
The 194 is an ANSI-standard miniature wedge bulb rated at 12V and 3.78W, classified under the T10 form factor.
The rear side marker position on the Saturn Aura (2007-2009) takes the 192 bulb.
The 192 is also an ANSI-standard T10 miniature wedge bulb operating at 12V, but draws 3W rather than the 3.78W of the 194.
Both the 194 and 192 share the T10 wedge base, meaning they are physically interchangeable in terms of socket fit, though their wattage ratings differ.
The wattage difference between the 194 (3.78W) and the 192 (3W) means substituting one for the other affects the light output at each position.
Both bulbs conform to ANSI standards recognized in the United States and Canada, indicating standardized electrical and physical tolerances.