Hyundai Ioniq Headlight Bulb Size

The Hyundai Ioniq high beam headlight uses a 9005 or D3S bulb size, while the low beam headlight requires an H7 or D3S bulb size. The replacement chart covers vehicle production years from 2017 to 2020 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.

High Beam Headlight

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
2020	9005 (With Halogen Capsule Headlamps)	HB3	Check Price
2017-2019	D3S (With HID Headlamps)	D3S	Check Price
2017-2019	9005 (With Halogen Capsule Headlamps)	HB3	Check Price

Low Beam Headlight

Years	Bulb Type	Shop
2020	H7 (With Halogen Capsule Headlamps)	Check Price
2017-2019	D3S (With HID Headlamps)	Check Price
2017-2019	H7 (With Halogen Capsule Headlamps)	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Single-filament halogen bulb with P20d base. 12V, 65W.	9005	Check Price
ECE standard (Europe & worldwide). Mercury-free HID (xenon) discharge bulb with PK32d-5 base and integral ignitor, for projector-type housings. 42V, 35W.	D3S	Check Price
ECE standard (Europe & worldwide). Single-filament halogen bulb with PX26d base. Also approved in the US and Japan. 12V, 55W.	H7	Check Price

Other Locations

Additional Notes

The Hyundai Ioniq headlight specifications cover two distinct headlamp system types across the 2017-2020 model years: halogen capsule headlamps and HID (high-intensity discharge) headlamps. These two systems use entirely different bulb technologies and are not interchangeable with one another.
The D3S is an HID xenon discharge bulb operating at 42V and 35W, conforming to the ECE standard used in Europe and worldwide. It features a PK32d-5 base with an integral ignitor and is designed specifically for projector-type housings. On the Hyundai Ioniq, the D3S serves as both the high beam and low beam bulb in HID-equipped trims for the 2017-2019 model years.
The 9005 is a single-filament halogen bulb conforming to the ANSI standard used in the US and Canada. It operates at 12V and 65W with a P20d base. On the Ioniq, it fills the high beam position in halogen capsule headlamp configurations across the 2017-2020 model years.
The H7 is a single-filament halogen bulb operating at 12V and 55W with a PX26d base. It follows the ECE standard but also carries approval in the US and Japan. On the Ioniq, it occupies the low beam position in halogen capsule headlamp configurations across the 2017-2020 model years.
Halogen-equipped Ioniq models from 2017-2019 use two different bulb types within the same headlamp assembly: the 9005 for high beam and the H7 for low beam. These two bulbs have different base types and wattage ratings and are not substitutes for one another.
The 2020 Ioniq is listed only with halogen capsule headlamp configurations, using the 9005 for high beam and the H7 for low beam. No HID headlamp option appears in the 2020 specifications.
The D3S operates at a significantly higher voltage than the halogen bulbs listed in these specifications. Its 42V operating voltage requires a dedicated ballast and ignitor circuit, which is why it is restricted to projector-type housings and cannot be fitted into standard halogen headlamp assemblies.
Because the 9005 and H7 share no common base type, P20d and PX26d respectively, a bulb intended for the high beam socket cannot physically seat into the low beam socket on halogen-equipped Ioniq models, reducing the risk of incorrect installation between those two positions.