Reduced wear throttle valve bearing

A method for optimizing the friction, wear, and function of an injection-molded throttle valve unit, including a throttle valve housing and a throttle valve that can move in relation to it. The throttle valve housing is injection molded out of a first plastic material inside a first cavity, then transferred to a second cavity. Bearing bushes are inserted into the throttle valve housing to constitute a hard/hard friction pairing between the bearing bushes and the throttle valve housing; either the bearing bushes are inserted into the throttle valve housing in a non-rotating fashion and the valve shaft rotates in relation to the bearing bushes or the bearing bushes rotate in relation to the throttle valve housing. The bearing bushes are preferably manufactured out of a metallic material and remain dimensionally stable when subjected to the injection pressure.