Belt Tensioner, INA - E60 545i/550i, E63 645ci/650i, E65 745i/750Li, E53 X5 4.4i/4.8is (N62)

This is the mechanical belt tensioner used on the N62 engine in E60 545i/550i, E63 645ci/650i, E65 745i/750Li, E53 X5 4.4i/4.8is.

The tensioner keeps the main serpentine belt at the proper tension. A failing tensioner will allow the belt to loosen or slip resulting in diminished performance. In extreme cases the belt can slip off the pulleys. As a preventative maintenance plan, we recommend replacing the tensioner at every belt change, or 40,000-60,000 miles.

This is an OEM belt tensioner manufactured by INA - the original supplier to BMW for this part, as well as many other tensioners and pulleys. As the OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.