The older style tensioner has a bearing and the bolt is captive to the tensioner assembly - the later style tensioner is shaped different and uses bushings on either side inside the housing to rotate on the bolt. The bolt is a separate part from the tensioner.

I placed an order for a Meyle tensioner, it comes with the bolt.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)