I drive a 2014 sDrive X1.
I sometimes get a single knock noise that sounds like it's coming from the front right side of the car when I leave home in the mornings and travel over the first speed hump in my estate.
I also get a knock noise sometimes when I get to work and park in our basement parking. I drive straight in and then do a turn to the right at full lock. I then reverse into my bay turning the wheel left (full lock). It's the transition from right to left lock when the single knock noise occurs. Doesn't happen all the time though
