Causes of excessively high excess pressure
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
- Engine damage.
- Blockage of the crankcase ventilation system.
- Faulty pressure control valve in the crankcase ventilation system.