120,000 km view – Exchange of the belt tensioner – sudden hum

Hello, my V60 (D3) was on 20.07. to the 120,000 Km – transparency. Last year there was a call back regarding the belt tensioner, which was changed now also with me. So far everything is ok and the car runs (as always) impeccable. However, what bothers me is a noise of noise, which comes from the area of the belt, left of the engine (passenger side). As to the maintenance only this service action was carried out, it can only be related to the new belt tensioner. In the meantime I drove about 1500 km and it does not get better. Is this problem known? To the result of the inspection – for those who are interested: There were no abnormalities, everything was ok. In about 20,000 km probably the next brake linings at the back become due and some bushings at the rear axle begin to work freely. Otherwise, the dampers of the rear flap can be slowly hanged down. Otherwise, I didn’t know any more “Mängel” at the moment. If there is interest, I can also upload the invoice. My previous opinion about the car: The car is not likes of the typical size of the Volvo, but I don’t want to keep talking about the quality in the interior.