2006 XC90 V8 103K miles. Volvo recommends replacing drive belt at 150K. Local dealer recommends replacing belt, pulleys and tensioner (at $975 cost) much sooner, at apx 100K. Dealer indicates pulleys & tensioner can lock up resulting in more costly damage and better to do replace sooner than later. Looking for feedback and real world experience in this area. Thanks!

 

I have seen quite a few idlers or tensioners fail well before 150k on the V8