Having issues with my abs being triggered when going over bumpy roads. I don't recall this ever happening unless I was driving in snow or loose gravel. So, I know this would indicate that the abs is functioning as the light goes right out, but what could be causing this? Also, I only notice it when the front passenger tire goes over bumpy roads. Last night I cleaned the wheel sensor and hub and still no change. Running new Bilstein HD, tie rods, steering damper, idler bushing all functioning properly. Did the tie rods and struts a few days ago and problem existed before then. Control arms and ball joints are also fairly new (Lemfoerder). Any suggestions?

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1990 190E 3.0L