How to Replace the Serpentine Belt and Tensioner on a 2004-2013 3 Series BMW E90 with N51/N52 3.0L

Brian Eslick from How to Automotive takes you step-by-step through the process of replacing the serpentine belt and tensioner on a BMW 3 Series E90 with the N51 or N52 6 Cylinder Engine. It is common for the belt tensioner to begin to walk off the belt when it is failing.