Buick Verano front side marker bulbs use 7444NA or 7443NA size, while rear side marker bulbs use 7443 size. The replacement chart covers 2012 through 2017 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 Buick Verano uses T20 wedge-base bulbs across all front and rear side marker positions for model years 2012-2017.
All three bulb types listed in these specifications, the 7444NA, 7443NA, and 7443, share the same electrical ratings of 12V with a dual-filament output of 21W and 5W.
The dual-filament design of the T20 bulb means it serves two lighting functions within a single housing, with the higher 21W filament and the lower 5W filament operating independently.
The rear side marker position on the Buick Verano uses the 7443 bulb for all six model years covered in these specifications, 2012-2017, making it the only position with no year-to-year variation.
The front side marker position alternates between the 7443NA and 7444NA across model years, with the 7443NA fitted in 2012-2014 and 2016, and the 7444NA fitted in 2015 and 2017.
The 7443NA and 7444NA bulbs both feature natural amber glass, which produces an amber light output through the glass itself rather than through an amber-tinted lens or housing.
The 7443 and 7443NA share the same ANSI designation number base, but the NA suffix on the 7443NA indicates the natural amber glass coating, distinguishing it from the clear-glass 7443 used at the rear.
Although the 7443NA and 7444NA are both natural amber T20 dual-filament bulbs with identical voltage and wattage ratings, they carry different ANSI part numbers and are specified for different model years in the front side marker position, indicating they are not confirmed as interchangeable for this application.