One problem related to radiator has been reported for the 2013 BMW X3. The most recently reported issues are listed below.
My engine was replaced in 2019 at a BMW certified dealership where I purchased. In July 2020 the car broke down and was towed in to BMW radiator was replaced and did not fix the problem. I was then told it was engine failure, that would not be covered. I have been without a vehicle for months.