Hyundai Azera front turn signal bulbs use PY21W, 1156NA, or 2357NA sizes, while rear turn signal bulbs use 1156NA size. The replacement chart covers vehicle production years spanning 2006 through 2017 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 Hyundai Azera uses three distinct turn signal bulb types across its production run: PY21W, 1156NA, and 2357NA. All three operate on 12 volts and produce amber light, but they differ in filament count, wattage, and base configuration.
The PY21W is an ECE-standard single-filament bulb rated at 21W with a BAU15s bayonet base. Its amber color comes from a tinted glass envelope rather than a natural amber coating, and it is the standard used in European and worldwide markets.
The 1156NA is an ANSI-standard single-filament bulb also rated at 21W, but it uses a BA15s bayonet base and achieves its amber output through natural amber glass. Although the 1156NA and PY21W share the same wattage, their base types are not interchangeable.
The 2357NA is an ANSI-standard dual-filament bulb with a BAY15d bayonet base, rated at 26.9W on its high-intensity filament and 8W on its low-intensity filament. Its base has two offset pins, which physically prevents it from being substituted with single-filament BA15s or BAU15s bulbs.
The Hyundai Azera front turn signal transitioned from the 2357NA (2006-2010) to the 1156NA (2011) and then to the PY21W (2012-2017), reflecting a shift from a dual-filament to a single-filament application at the front position.
The 2012 front turn signal carries a production date qualifier, specifying the PY21W from 12/14/2011 onward, while the 2017 front turn signal specifies the PY21W only up to 12/8/2016. These date boundaries indicate mid-year specification changes rather than clean model-year transitions.
The rear turn signal on the Azera uses the 1156NA across all listed model years from 2006-2017, making it the only position with a consistent bulb specification throughout the entire production range covered by these data.
Because the BA15s (1156NA), BAU15s (PY21W), and BAY15d (2357NA) bases are physically distinct, substitution between these bulb types is not possible without an adapter, regardless of matching voltage or wattage ratings.