Kia K5 Trunk Bulb Size

The Kia K5 trunk light utilizes a DE3423 bulb size for illumination within the rear storage compartment. Data for the specific lighting component covers the period from 2021 through 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	DE3423
2021	DE3423

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423

Other Locations

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 measures 41mm in length, which is the critical fitment factor for festoon bulbs, as the end-cap contacts must span the fixture's contact points precisely.
The DE3423 operates at 12 volts, consistent with standard automotive electrical systems.
The DE3423 designation follows the ANSI standard used in the United States and Canada, meaning the specification applies to North American market vehicles.
The Kia K5 uses the DE3423 for its trunk bulb across the 2021-2024 model years, indicating a consistent fitment across that production span.
Festoon bulbs of the same length are sometimes cross-compatible across different part numbers, but the 41mm length of the DE3423 must be matched exactly, as a shorter or longer festoon will either fail to make contact or will not seat within the fixture.