One problem related to battery has been reported for the 2001 Saturn SL2. The most recently reported issues are listed below.
Numerous brake failure. Brake pedal fades to the floor after sitting overnight, notice not fluid at rt front brake line, replace master cylinder. Power bleed and rt 26 miles after rapair, normal braking performance. Poor brake performance, sometimes a loud snap or click before failure, sometime no warning, sometime just a soft or spongy brake pedal. Battery leaking acid into battery box, verified and found battery leaking at possitive cable replace battery, cover, possitive cable, trans filter and cleaned engine compartment. Hose from coolant tank to throttle body rubbed, replace hose. Adjustment parking brakes hard to pull, adjust per service manuel.