Hyundai Elantra GT Parking Light Bulb Size

The Hyundai Elantra GT parking light uses bulb sizes 2357NA and PY21W for the lighting components. Data for the specific bulbs covers the period from 2013 through 2019.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2019	PY21W (From 6/11/2018)
2013-2018	2357NA

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W.	PY21W
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 26.9W/8W.	2357NA

Other Locations

Additional Notes

The 2357NA bulb appears across the Hyundai Elantra GT for model years 2013-2018, making it the dominant fitment in these specifications. It follows the ANSI standard used in the United States and Canada.
The 2357NA is a dual-filament bulb, operating at 12V with a high filament rated at 26.9W and a low filament rated at 8W. It uses a BAY15d bayonet base, which features two offset pins to ensure correct orientation during installation.
The natural amber glass of the 2357NA produces its amber color through the glass itself rather than a coating, which is a characteristic of the NA (Natural Amber) designation in the ANSI bulb naming system.
The 2019 Hyundai Elantra GT introduced the PY21W bulb as a replacement for the 2357NA, but only for vehicles produced from June 11, 2018 onward, indicating a mid-production-year change rather than a clean model-year transition.
The PY21W follows the ECE standard used in Europe and worldwide markets. It is a single-filament bulb rated at 12V and 21W, using a BAU15s bayonet base. The BAU15s base has a single offset pin, distinguishing it physically from the dual-pin BAY15d base of the 2357NA.
Because the BAU15s and BAY15d bases are physically different, the PY21W and 2357NA are not interchangeable. Installing the wrong bulb type in a 2019 Elantra GT requires confirming the vehicle's production date relative to the June 11, 2018 cutoff.