when should timing belt be replaced?

I guess you have the B5254T2 engine. Volvo suggest to replace the timing belt and the tensioner at every 120,000 miles or 10 years. I strongly suggest to replace the idler pulley, water pump, crank and cam seals also. Zee

105k...be safe..not sorry..vavle job is very high on 5 cyl. volvo.. just get r done..and enjoy another 100k..