Tensioner Assembly for auxiliary belt suitable for Dodge, Jeep, Mercedes-Benz. Belt drives have the task of transmitting and driving the rotary motion of the crankshaft to the engine control system or to the auxiliary units. Belt drive components are therefore required to deliver maximum performance in every vehicle. In order for the belt drive to run optimally, the belt tension specified by the manufacturer must be maintained. febi offers a comprehensive range of tensioner assemblies for auxiliary belts in OE matching quality.