For the 1939 racing season, despite being a Sergeant-Instructor with the Military Police, Meier continued racing for the factory BMW team during his periods of leave. During the 1939 season, Meier along with fellow motorcycle racer Hermann Paul Müller were reserve drivers for the German Auto-Union Racing Team. During practice for the 1939 Isle of Man TT Race, Meier's BMW teammate, Kall Gall crashed at Ballaugh Bridge and later died of injuries combined with the effects of pneumonia in hospital. After considering withdrawing from the TT races, BMW management decided that Meier and Jock West would compete in the 1939 Senior TT race which Meier led from start to finish, winning at an average race speed of 89.38 mph. Jock West finished in second place.