The invention relates to a wind turbine comprising a plurality of individual yaw bearing units and a method of replacing a pad of such a yaw bearing unit. The yaw bearing unit comprises a caliper structure divided into an upper portion and a lower portion, wherein the lower portion can be dismounted without also dismounting the upper portion. An upper pad is provided between a flange providing support for a nacelle and a mainframe of the nacelle. A radial pad is arranged on a radial surface of the upper portion and contacts a stop element located at either ends of the upper portion. An adjustable lower pad is arranged in a through hole in the lower portion and can be replaced via a lower opening in the lower portion. The radial pad can be replaced in a sideward direction by removing one of the stop elements or replacing it in an axial direction by removing the lower portion.