The Hyundai i-oniq (also known as the i.oniq and HED-8) was a concept sporty three-door hatchback designed and built by Hyundai Motor Corporation that featured a battery electric powertrain supplemented by a range extending gasoline engine, introduced in March 2012 at the Geneva Motor Show.

Hyundai subsequently launched the sub-brand Ioniq in 2020 to market electric vehicles built on the E-GMP architecture.

Hyundai state the i-oniq follows the "fluidic sculpture" design language introduced in 2010 with the i-flow concept vehicle.

[1][2] It was designed at the Hyundai Motor Europe Technical Centre in Russelsheim, Germany, under the leadership of Thomas Bürkle.

[3][4] The instrument panel and steering wheel touchscreen displays were designed by MESO Digital Interiors GmbH, using small projectors and Pepper's ghost illusions to provide depth and conform to the complex surface curvature.