Hyundai Ioniq Sun Visor Bulb Size

The Hyundai Ioniq sun visor requires a DE3423 bulb size for the interior lighting component. Data for the specific bulb requirements covers the range from 2017 to 2018.

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 Type	Shop
2017-2018	DE3423	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423	Check Price

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Additional Notes

The DE3423 is a festoon-type bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at each end rather than through a base socket.
The DE3423 follows the ANSI standard, which is the specification system used in the United States and Canada, and operates at 12 volts, consistent with standard automotive electrical systems.
The bulb measures 41mm in length, which is the critical fitment factor for festoon bulbs, as the end-cap contacts must span the holder's contact points precisely.
The Hyundai Ioniq uses the DE3423 for the sun visor bulb position across the 2017-2018 model years, indicating consistent fitment within that production span.
Festoon bulbs of the same length are sometimes cross-compatible across different part numbers; however, substituting a bulb of a different length risks poor contact or physical incompatibility with the visor housing.