Buick Reatta front and rear side marker bulbs utilize 194NA and 194 bulb sizes respectively. The replacement chart covers 1988 to 1991 vehicle 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 Buick Reatta uses the 194NA bulb for the front side marker position across all model years covered, spanning 1988-1991.
The rear side marker position across the same 1988-1991 model years calls for the 194 bulb.
Both the 194NA and 194 are ANSI-standardized miniature wedge bulbs of the T10 type, operating at 12 volts and rated at 3.78 watts.
The T10 wedge base is a common automotive form factor in which the bulb body itself serves as the contact, requiring no separate metal base or pins.
The 194NA and 194 share identical electrical ratings and the same T10 wedge form factor, making them physically interchangeable in terms of fitment.
The distinguishing characteristic of the 194NA is its natural amber glass envelope, which filters the light output to produce an amber color without the use of a separate lens or coating.
Because the 194NA produces amber light through its glass rather than through the vehicle's lens, substituting a clear 194 in the front side marker position would alter the emitted color at that position.
Both bulb types carry ANSI certification applicable to the United States and Canada, indicating conformance to a defined performance and construction standard.