One problem related to battery has been reported for the 2001 Volvo S40. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Volvo S40 based on all problems reported for the 2001 S40.
When accelerating vehicle would down shift gears. The dealership will be notified. The dealer have not been able to duplicate the problem. The transmission jerking occurred, the engine light would come on. There would be a burning oil smell, the gear shifter would not release and would stick intermittently, the steering wheel squeaked and was unable to be duplicated, the windshield wipers would squeak, and the speaker was erratic. Trhe battery was replaced, the tail lights were out, the windshield was replaced.