Product Feature: * Application: Compatible with 2004-2006 BMW V8 N62 engines, used while no belt tensioner. Comparable to OEM #641040 and #83800494518. Detailed vehicle models-- Suitable for the following vehicle models: 2004-2005 545i, 2006-2010 556i, 2004-2005 645ci, 2006-2010 650i, 2002-2005 745i, 2002-2005 745li, 2006-2008 750i, 2006-2008 750li, Alpina B7 2007-2008. * Superior Material: Manufactured from high strength premium steel, very sturdy and durable. The surface is coated with silver coating, which effectively improves the rust and friction resistance, and the service life of the market product is extended. .