The Hyundai Ioniq side marker utilizes a 12961 bulb size for the specific lighting component located on the exterior of the vehicle. Data for the bulb size 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.
The 168 bulb is the sole bulb type listed across all front and rear side marker positions in the Hyundai Ioniq specifications. It is an ANSI-standardized type used in the United States and Canada, classified as a T10 miniature wedge bulb operating at 12 volts and 4.9 watts.
The T10 designation refers to a tubular wedge-base bulb approximately 10mm wide. The wedge base design means the bulb is held in place by the socket itself rather than by a separate bayonet or screw mechanism, which is a common trait in low-wattage automotive marker applications.
At 4.9 watts, the 168 is a low-power bulb, consistent with its role in side marker lighting rather than primary illumination. Its 12-volt rating aligns with standard automotive electrical systems.
The front side marker position uses the 168 bulb across the 2017-2020 model years. The 2020 front side marker entry carries a notation specifying applicability to vehicles equipped with Halogen Capsule Headlamps, while the 2017-2019 entries carry no such condition.
The rear side marker position covers the 2017-2019 model years, and all three entries are explicitly conditioned on the presence of Halogen Capsule Headlamps in the Hyundai Ioniq. This indicates that vehicles with a different headlamp configuration may not use this bulb in the rear side marker position.
The Halogen Capsule Headlamp condition appearing on the rear side marker for all listed years, and on the 2020 front side marker, suggests that headlamp type is a relevant fitment variable for side marker bulb selection on this vehicle.