The usual cause is the lower control arm. The test that usually determines if the control arm is worn out is riding on the center lane of three lanes and doing a very gentle curve staying in your lane where you drive over the crown of the road.

If that makes your steering wheel jiggle a little bit as you cross over the dead center every time I’ve done this test it was the rear arm of the front wheels.

The other test that usually confirms that problem is when you brake moderately from about 50 miles an hour to 40 miles an hour.

I had a similar issue solved, and then I got a wobble in my steering that turned out to be the steering gear.

have somebody steer the steering wheel left and right with the engine off and hold your hand on one of the tie rods feel for backlash in the gears to rule that out.

if it turns out to be the steering gear, I have a spare.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)