Upper Timing Chain Tensioner, Bank 1, INA - E39, E38, E31, E53 M62/M62TU

This is the upper timing chain tensioner for the M62 and M62TU engines in the E39 540i, E38 740i, E31 840ci, and E53 X5 4.4i/4.6is. This tensioner regulates the upper timing chain used to rotate the camshafts for each bank. This tensioner is for Bank 1, cylinders 1-4 (passenger side). The top of this tensioner is also a plastic guide that can wear and cause too much slack in the chain. Slack in the chain will cause poor performance so the tensioner must be functioning well.

Do not confuse chain rattle/slap with any other more serious rattles, such as VANOS or timing chain guides. The timing chain tensioner mostly relies on oil pressure so it will reach proper tension quickly. Prolonged rattles from the front of the engine may indicate a problem somewhere else.

This is an OEM timing chain tensioner manufactured by INA/Ruville - the original supplier to BMW for this part, as well as many other timing components. 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.

Replaces previous BMW part #11311742173.