Hyundai XG350 Brake Bulb Size

The Hyundai XG350 brake light uses 1157 and 2357 bulb sizes depending on the specific production period for the vehicle. Data for the bulb sizes covers the range from 2002 through 2005.

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

Brake

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
2004-2005	1157	P21/5W	Check Price
2002-2003	2357	2357	Check Price

Center High Mount Stop Light

Years	US Type	EU Type	Shop
2002-2003	1156	P21W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157	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). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.	2357	Check Price
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156	Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W	Check Price

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Additional Notes

The Hyundai XG350 brake light specifications cover the 2002-2005 model years, with two distinct bulb types used across those years depending on the model year in question.
The 1157 is an ANSI-standard dual-filament bulb rated at 12V with a 21W main filament and a 5W secondary filament, fitted with a BAY15d bayonet base. This base type uses two offset pins to ensure correct orientation during installation. The XG350 uses this bulb for brake lights in the 2004-2005 model years.
The 2357 is also an ANSI-standard dual-filament bulb with a BAY15d bayonet base, rated at 12V with a 26.9W main filament and an 8W secondary filament. It is a higher-output variant of the 1157 and is specified for brake lights on the 2002-2003 XG350.
Because the 1157 and 2357 share the same BAY15d base, they are physically interchangeable in terms of socket fit. However, the two bulbs differ in wattage output, and substituting one for the other may affect brake light brightness relative to the original factory specification.
The 1156 is an ANSI-standard single-filament bulb rated at 12V and 21W, using a BA15s bayonet base. Unlike the BAY15d base, the BA15s base has a single pin and is not keyed for orientation. The 1156 is not interchangeable with either the 1157 or the 2357 due to the difference in base type and filament count.
The 1156 is specified for the Center High Mount Stop Light on the 2002-2003 XG350. As a single-filament bulb, it operates solely as a stop light without a secondary running-light function.