The little rubber or silicone buttons on both fobs for our '16 Hyundai Santa Fe rotted away so that they both became unusable. New fobs cost a FORTUNE! So, I fixed old ones and saved a TON of money. I won't be able to make much of a judgment on the replacement pieces until they've been used (and abused) out "in the wild" for a while. How they hold up in pockets and purses will be the real test. #keyfob #hyundai #santafe