Niedermayr, who was living in Berlin at the time , took part in only one run to the Formula 1 automobile world championship, the German Grand Prix on August 3, 1952. He started as a private driver with an AFM racing car and thus achieved ninth place Race that was held as a Formula 2 race this year .
On August 31 of the same year, Niedermayr had a serious accident in a Formula 2 race on the Grenzlandring with his race car built by Reif and powered by a Veritas Meteor engine . While he himself was only slightly injured, at least 13 spectators were killed in this most fatal accident in German racing history (some sources name another, unknown dead) while 42 people were injured. The Niedermayr accident ensured that races were never again held on the high-speed oval around the town of Wegberg .