30116 Tensioner Pulley MIN_10 FEBI 103685 Engine Mounting

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30116 Tensioner Pulley MIN_10 FEBI 103685 Engine MountingFEBI 30116 Tensioner Pulley with bracket, for auxiliary belt Category Engine Belt Drive Idler And Guide Pulleys Brand BMW Cross references 64 55 7 786 287 64 55 7 788 684 64557786287 64557788684 The crankshaft begins to oscillate back and forth at high frequency, especially at low engine speed, as a result of torsional vibration caused by the engine's power impulses. The vibration would be carried through the auxiliary belt drive system without a