Electric heater assembly, especially for a motor vehicle

The assembly has a two-piece housing (20), through which air which can be heated flows. An electrically operable heating unit (2) is arranged in the housing. Positioning units (23) are provided for an electrical contacting at two positions in the housing, where the electrical contacting is arranged only in one of the positions. The electrical contacting of the heating unit is arranged with a cable in the housing. An independent claim is also included for a motor vehicle-heating and/or air conditioning system with an electric heater assembly.