Visit http://www.automd.com for more auto repair videos. Our Do It Yourself and auto expert community has you covered with this Repair-apedia of easy step-by-step instructions. The alternator belt is a rubber belt that drives the alternator. It is located on the front of the engine and is driven by the crankshaft pulley. In this video, AutoMD shows how to replace your car's alternator belt. You can check this link for the steps: http://www.automd.com/182/how-to-replace-an-alternator-belt/