Hyundai Genesis Turn Signal Bulb Size

Hyundai Genesis front and rear turn signal bulbs utilize PY21W, 2357NA, 1156NA, and 12496 sizes depending on location and model configuration. The replacement chart covers 2009 to 2016 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.

Front Turn Signal

Years	US Type	EU Type	Shop
2016	7507	PY21W	Check Price
2015	2357NA (With Halogen Capsule Headlamps)	P21/5W	Check Price
2009-2014	2357NA	P21/5W	Check Price

Rear Turn Signal

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
2016	7507	PY21W	Check Price
2015	1156NA (With Halogen Capsule Headlamps)	PY21W	Check Price
2014	7507	PY21W	Check Price
2009-2013	12496	12496	Check Price

Bulb Specifications

Description	Type	Shop
ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W.	PY21W	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 26.9W/8W.	2357NA	Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W	Check Price
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base, natural amber glass. 12V, 21W.	1156NA	Check Price
Philips/Osram part number. Halogen bulb, specialty application. 12V.	12496	Check Price

Other Locations

Additional Notes

The 2357NA bulb follows the ANSI standard used in the US and Canada. It is a dual-filament bulb rated at 12V with a high/low wattage of 26.9W and 8W respectively, fitted with a BAY15d bayonet base and natural amber glass. This type appears in the front turn signal position of the Hyundai Genesis across the 2009-2015 model years.
The PY21W bulb follows the ECE standard used in Europe and worldwide markets. It is a single-filament amber bulb rated at 12V and 21W, fitted with a BAU15s bayonet base. It is specified for both the front and rear turn signal positions on the 2016 Genesis.
The BAY15d base of the 2357NA and the BAU15s base of the PY21W are physically distinct and not interchangeable. The BAU15s features an offset pin arrangement, while the BAY15d uses a dual-pin configuration, meaning these bulbs cannot be substituted for one another despite sharing a similar bayonet-style mounting format.
The 1156NA is a single-filament bulb rated at 12V and 21W with a BA15s bayonet base and natural amber glass, conforming to the ANSI standard. It is specified for the rear turn signal of the 2015 Hyundai Genesis with halogen capsule headlamps.
The 2357NA specified for the 2015 front turn signal position also carries the halogen capsule headlamp condition, indicating that headlamp type is a determining factor in bulb fitment for that model year.
The 12496 is a Philips/Osram part number designating a 12V halogen bulb for specialty applications. It is specified for the rear turn signal position of the Genesis across the 2009-2013 model years.
The rear turn signal position of the Genesis uses four distinct bulb types across its production span, specifically the 12496, PY21W, 1156NA, and PY21W again in 2016, reflecting that rear fitment varies more across years than the front position.
The single-filament design of both the PY21W and 1156NA means neither bulb carries a secondary low-wattage filament, distinguishing them functionally from the dual-filament 2357NA, which serves both turn signal and parking light functions through its two filaments.