Kia Seltos Turn Signal Bulb Size

The Kia Seltos turn signal requires a bulb size of P21/5W for the front and rear lighting components. Data for the specific bulb requirements covers the range from 2023 to 2024.

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
2023-2024	P21/5W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W

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Additional Notes

The P21/5W is the turn signal bulb size for the Kia Seltos across the 2023-2024 model years.
The P21/5W follows the ECE (Economic Commission for Europe) standard, which is recognized across European and worldwide markets, distinguishing it from SAE-standard bulbs used in North American applications.
This bulb type operates on a dual-filament design, with one filament rated at 21 watts and a secondary filament rated at 5 watts, allowing a single bulb to serve two lighting functions simultaneously.
The P21/5W uses a BAY15d bayonet base, which features two offset pins at different heights on the base. This asymmetric pin arrangement ensures the bulb can only be inserted in one orientation, preventing incorrect filament alignment during installation.
The BAY15d base is not interchangeable with the single-filament BA15s base or the same-height dual-pin BAY15s base, as each has a distinct pin configuration that corresponds to a different electrical contact layout.
The bulb operates at 12 volts, which is consistent with standard automotive electrical systems.