[Cmudr1]

I have a 2001 Sonata and had the same problem. The thing is that within the past few years the Stock Battery Model # apparently has been changed to be a battery with about 250 less cranking amps. We found the exact same size, model # and all but it has 250 less cold cranking amps, at Autozone only. It doesn't seem to have the same amount of oomph" when starting up but car is running just fine. Maybe they found that it didnt need to have as much juice.
Chris