One problem related to battery has been reported for the 2003 Toyota Corolla. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Toyota Corolla based on all problems reported for the 2003 Corolla.
(1) rotten-egg smell from day 1 (purchased 9/2002) w/ cooling or heating system function. Dealer told me to switch octane and do not use recirculation - no improvement. (2) in 11/2003, daytime running lights came on in middle of night, drained battery. Dealer said TSB had been released - part ordered & installed to correct problem. (3) in 1/2004, leaking oil from under car, right front passenger's side - dealer said right front strut leaking & "completely blown. " had to be replaced & car required subsequent alignment.