Hyundai uses two different materials for their dashboards. Hyundai uses a Basic material on all it's models except for the Equus, Genesis and Azena SP which use a smooth Nappa material. We carry this in the older EZ-Pass, pre 2012 square style transponder as well as the newer I-Pass, post 2012 round shaped transponder. Please see below for pictures of the two different types of transponders as we have seen the newer I-Pass also called the EZ-Pass. The square one is the one we call the EZ-Pass (second to last picture) while the second is the I-Pass (last picture).
Our cases attach to the EZ-Pass and I-Pass using two straps the hook and loop Velcro ends. As you can see from the second picture, the straps do not interfere with the transponders other Velcro strips that allow the transponder to attach to the windshield. They are designed not to interfere with the signal to the reader above the toll road. They also resist fading in direct sunlight.
There is a Basic material used on all of their models except the Equus, Genesis and Azena SP which will be available in April, 2017. The Nappa material used in the Equus, Genesis and Azena SP available in February, 2017.