INFINITI QX50 Trunk Bulb Size

The INFINITI QX50 trunk light requires DE3423, DE3022, or DE3175 bulb sizes depending on the specific version. Data for the components covers the period from 2014 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
2020	DE3022
2019	DE3423
2014-2017	DE3175

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3022
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175

Other Locations

Additional Notes

The DE3423 and DE3175 are the two most frequently specified trunk bulb types across the Infiniti QX50 model years listed, with DE3423 appearing in three entries and DE3175 appearing in four.
All three bulb types in these specifications, DE3423, DE3022, and DE3175, are festoon-style bulbs. Festoon bulbs are cylindrical lamps that make electrical contact through metal caps at each end rather than through a base pin or wedge.
The DE3423 operates at 12 volts and has a 41mm length, making it the longest of the three festoon types listed. It is specified for the 2019 and 2023-2024 QX50.
The DE3022 and DE3175 share the same 31mm length and 12-volt rating, and both use end-cap contacts. Despite these physical similarities, they carry distinct ANSI designations and are not listed as interchangeable within these specifications.
The DE3175 is specified for the 2014-2017 QX50, while the DE3022 appears only for the 2020 model year. Because the two bulbs share the same length and contact style, substituting one for the other without confirming the correct designation for a given year risks an incorrect fitment.
All bulb types listed conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical tolerances across those markets.
The 2019 and 2023-2024 model years share the DE3423 specification, while the intervening 2020 model year uses the shorter DE3022. This means the trunk socket configuration is not uniform across the second-generation QX50 production run.
Because the DE3423 is 10mm longer than the DE3022 and DE3175, a bulb of the wrong length would not seat correctly in the trunk lamp housing, as festoon holders are sized to grip the bulb at a fixed span between the two end caps.