from the back of each foglight, u need to turn the bulb i think anti clockwise. btw these bulbs are quite expensive, are you sure the bulb has blown, cos i had this where one fog light was out, replaced the bulb and still was out, found it was connection by left foglight as viewed from drivers seat facing forward. i broke the connection and reconnected it and the fog light has worked without fault since. ps i only knew the fog light was out cos dis said.