One problem related to electrical failure has been reported for the 2003 Volvo S60. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Volvo S60 based on all problems reported for the 2003 S60.
1) electric reading of dashboard goes completely dark. Unable to determine speed, fuel, engine temperature, ect. Urgent air bag warning light went on prior to it going dark. Car skips gears and revs when gas pedal is pressed. 2) radiator cooling fan keeps running when connected even when vehicle is turned off. It never turns off until battery is drained. Replaced entire unit as well as battery and still has the same problem. Volvo repair stated they never had an issue like this and issue maybe connected to failed electrical system.