Hyundai Veloster Map Light Bulb Size

Additional Notes

• The Hyundai Veloster map light specifications reference two distinct bulb types across its production run: the 904 and the DE3175, both of which conform to ANSI standards applicable in the United States and Canada.
• The DE3175 is a festoon-style bulb with a 31mm length and end-cap contacts, operating at 12V. Festoon bulbs make contact at each end of the housing rather than through a base, which is a defining characteristic of this form factor.
• The 904 is a miniature wedge bulb in the T10 form factor, rated at 12V and 8W. Wedge bulbs are held in place by the socket itself rather than by a separate base, and the T10 designation refers to the tubular shape of the glass envelope.
• The Hyundai Veloster (2012-2017) uses the DE3175 festoon bulb for the map light position across all model years in that span.
• The 2019 Veloster uses the 904 bulb for vehicles produced from March 16, 2018 onward, indicating a mid-cycle production change that affects fitment within that model year.
• The 904 and DE3175 are not interchangeable. They differ in physical form factor, contact type, and wattage rating, meaning a socket designed for one will not accept the other.
• The production date qualifier on the 2019 model year entry means that not all 2019 Veloster vehicles share the same map light bulb specification, and the build date of the individual vehicle determines the correct fitment.