Hy-Ko KC900 Non-Rechargeable Fob Battery, 3 V Battery, Lithium-Ion

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.