2001 X5 4.4 DSC and ABS warning lights
 

These lights came on and the ABS started ingaging by themselves. I unplugged the battery to let the system reboot. It seemed to take care of the problem, but I'm still kind of paranoid.

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The DSC won't work if the ABS has a fault. Random ABS engagement sounds like a dodgy wheel sensor. Get it on a fault code reader to find out what faults are stored and what parts need replacing.

Thanks, Bob, but I disconnected the battery for a while it fixed the problem. Now I'm having a different issue.
My rear air suspension is inactive. I replaced the relay on the pump itself, but that did not fix the problem. Any suggestions?

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I had the same DSC and ABS lights come on and it was one of my wheel speed sensors also. No sure how its possible a wheel speed sensor will affect your leveling suspension though. Good luck.