Will discoNNECTING the battery reset my abs light on my 98 bmw 528i?

Disconnecting the battery may reset the ABS light on your 1998 BMW 528i temporarily, but it won't necessarily fix the underlying issue that triggered the light. The ABS light indicates a problem with the anti-lock braking system, and simply resetting it won't address any faults in the components or sensors. It's best to diagnose the problem using a scan tool to read the error codes before disconnecting the battery.