Tried INA replacement but the body alloy was too soft and the Torx 60 socket in the body of the tensioner ended up getting stripped while trying to release the pin that' the tensioner comes with pre-installed the make belt mounting easier...the alloy is way more ridged on this geniune BMW tensioner even though this is made by INA as well, but this one is held to a higher standards by BMW and it has the BMW logo engraving.
One important thing to not is this tensioner didn't come with the bolt!