Originally Posted by Pacosworld
Yea, Kia and Hyundai use the same sensor. They tend to use the same parts across most of their vehicle lines.
And I can attest as a Kia tech, Kia vehicles will only allow 4 sensors to be registered. The way the TPMS diagnostic tool works, it will only register/read 4 sensors. If you try to go beyond that, it will show a read error. Now whether Hyundai uses the same software as Kia is questionable. The TPMS module may even be the same part number for Hyundai/Kia on certain models, but how they setup the software is ultimately up to them.
Be it far from me to challenge your expertise but I do want to make some additional comments.
The original tires and wheels were programmed on the Hyundai when I purchased it new. The second set of tires, wheels and installed sensors I purchased off ebay "programmed" themselves on the way to the dealer (after about 1,000 miles of driving) and then for good measure the dealer programmed them again. This was the second set that was programmed.
Not needing the original tires, I removed them and resold them to a relative. I removed all four of the original sensors that came with the car and put them away. Desiring a full size spare I put one of the original sensors in a new wheel I had purchased on ebay which came without a sensor. When it was placed on the vehicle the light immediately went off and remains off to the present day.
1) How was it possible for the second wheel/tire set to "program" itself on the way to the dealer after approximately 1,000 miles with the light on? The dealer had no explanation but I know for a fact the light went off. That is an enduring mystery.
2) Are Hyundais different from Kias as to their sensing hardware in the vehicles? That is to say, it appears that I have eight sensors programmed to the Sonata. That would appear to have to be a different technology or software would it not? Those are the only two possibilities that I can discern. Your answer suggests the software is different. In any event I know that the remaining three sensors will work in either my Sonata or my Kia.
Having said this, I very much appreciate your input. Thank you very much.