Hyundai Sonata Daytime Running Light Bulb Size

The Hyundai Sonata daytime running light requires a bulb size of 1157 for the lighting system. Data for the bulb size covers the range from 2018 to 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
2018-2019	1157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157

Other Locations

Additional Notes

The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope. One filament operates at 21W for the brighter function, and the other operates at 5W for the lower-intensity function, both running on a 12V circuit.
The 1157 uses a BAY15d bayonet base, which features two offset pins positioned at different heights on the base. This offset pin arrangement prevents the bulb from being inserted in the wrong orientation, ensuring each filament connects to its correct circuit.
The 1157 is classified under the ANSI standard, making it a standardized type recognized across the United States and Canada. This standardization means replacement bulbs from different manufacturers carrying the 1157 designation share the same base type and electrical ratings.
The Hyundai Sonata uses the 1157 bulb size for the daytime running light position across the 2018-2019 model years.