When do you change timing belt on Volvo S60?
Volvo recommended interval is 105,000 miles. You also replace the tensioner and the idler pulley at this time.
You might also consider replacing the water pump at this time, it's driven by the timing belt and requires very little more labor to replace while you have the timing belt off.
According to Volvo's Schedule of Factory Maintenance Service Operations, the timing belt (cam belt) should be replaced every 105,000 miles for a 2003 Volvo S60. Two footnotes in the service schedule document add: "Service interval for vehicles with engine VIN Code #59 is 120,000 miles", and "S60 and V70 non-turbo automatic transmission models (VIN Code #64) sold in California, Massachusetts and Vermont are classified as SULEV+ vehicles. The Timing belt and tensioner replacement interval for…