Suitable for BMW. 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 pulleys for auxiliary belts in OE matching quality. The tensioner pulley not only keeps the auxiliary belt tensioned, it also compensates for the elongation of the belt that occurs over time. It also absorbs vibrations so that they do not have a negative effect on the functioning of the belt drive. For these tasks, the quality of the tensioner pulley must be perfect. Tensioner pulleys from febi are therefore intensively tested. Our quality management tests the tensioner pulleys offered for various requirements and loads, e.g. accuracy of fit, dimensional accuracy, material quality, and tensile strength. When replacing the auxiliary belt, the surrounding components should also be checked for wear. For all parts to work together perfectly, it is extremely important that they are precise and made of high-quality materials. febi offers complete auxiliary belt kits for certain vehicle types which contain all the individual parts required for professional replacement.