worn rear subframe bushings can cause the car to rear steer. But if its darting on grooved roads badly it most probably has a steering issue, I had that in my W124 and it was a bad steering box.

Once squared away properly all the way front to back with new rubber parts and a rebuilt steering box it was the best riding car. Firm yet supple and very smooth and stable at speed.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)