Hy-Ko KC900 Fob Battery 3 V Battery CR1620 Battery Lithium - Pack of 5

Commonly used in Volkswagen, VW, Hyundai, Daewoo, Daihatsu, Fiat, Audi, Renault, Peugeot, Citroen and Ford keys, always replace the battery in the key even if dead to preserve settings, non-rechargeable.