Fitted the front of the crankshaft, the vibration damper/harmonic balancer is designed to counteract the natural imbalance of your BMW's diesel engine. Over time, these will simply wear out or can fail suddenly. Excessive vibration and potential damage to your engine can result, which is why a quality replacement is a must. With the longevity of your engine in mind, we offer the same part BMW fitted at the factory that has been manufactured by the original equipment supplier. The BMW logo has been etched off, allowing us to offer it at a fraction of the dealership price. Set of bolts included. Made in Germany.