The Chevrolet Spark parking light requires bulb sizes 7443NA and 7444NA for proper illumination. Available information covers the specific time range from 2013 through 2020 for the specified vehicle.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 7443NA and 7444NA bulbs share the same wattage rating of 21W/5W and both follow the T20 wedge form factor, which refers to a plastic wedge base without metal pins used for retention and electrical contact.
All three bulb types listed in the Chevrolet Spark parking light specifications carry the "NA" suffix, which denotes natural amber glass. This coloring is built into the glass envelope itself rather than applied as a coating.
The 7440NA is a single-filament bulb rated at 21W, while the 7443NA and 7444NA are dual-filament bulbs rated at 21W and 5W. The two filaments in the latter types serve separate functions, typically a higher-output circuit and a lower-output standby or running circuit.
The 7443NA and 7444NA are both dual-filament T20 wedge bulbs with identical wattage ratings, though they are distinct part numbers. These two types are not guaranteed to be interchangeable, as differences in filament pin orientation or internal construction may affect fitment in a given socket.
The 7440NA, used in the 2021 Chevrolet Spark front parking light, is a single-filament variant and is electrically incompatible as a direct replacement for the dual-filament 7443NA or 7444NA sockets used in other model years.
All bulbs in these specifications operate at 12 volts, which is standard for automotive electrical systems in passenger vehicles.
The 7443NA appears in the Chevrolet Spark front parking light position for model years 2013-2016 and 2018, while the 7444NA covers 2017 and 2019-2020, indicating that two physically similar but distinct dual-filament bulbs were specified across the production run.