Many proprietors of BMW E60 and E61 530d/535d models encounter challenges related to the differential . A common defect is excessive whining, often described as a rumbling from the back of the vehicle . https://bmw-e60e61-530d-535d-dif096397.alltdesign.com/bmw-s-e60-530-diesel-535-diesel-diff-issues-solutions-60738607