Hyundai Santa Cruz Tail Light Bulb Size

The Hyundai Santa Cruz tail light requires a P21/5W bulb size for proper illumination and function. Data for the specified lighting component 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 tail light bulb type used across the 2023-2024 Hyundai Santa Cruz.
The P21/5W operates on a 12-volt electrical system, which is standard for passenger vehicles in this segment.
As a dual-filament bulb, the P21/5W serves two lighting functions within a single unit, typically combining a brighter stop light output (21W) with a lower-intensity running light output (5W).
The P21/5W uses a BAY15d bayonet base, a two-pin offset base design where the two pins are positioned at different heights to prevent incorrect installation.
The P21/5W is governed by ECE (Economic Commission for Europe) standards, meaning it is recognized and used across European and international markets rather than being exclusive to North American specifications.
The BAY15d base is not interchangeable with single-filament bayonet bases such as the BA15s, as the pin configuration and internal filament arrangement differ between the two types.