It is actually the Dynamic Stability Control, not the ABS (unless you are braking at the time that it happens).

Agree with UCrew that it could be a wheel speed sensor. It could be any one of the four sensors, the only way to tell is to read the codes.

It could also be in the ABS Controller, which actuates the brakes for DSC and ABS. Sensors are much cheaper, so hope that is all it is.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue