[328iX]

Originally Posted by paulwtech

Check your coolant expansion tank regularly; if it goes low for no apparent reason, (like mine did twice), get the motor to a dealership & have them diagnose the EGR cooler "regardless" of whether you have had a notice letter or not! At the time, I hadn't had a letter, but I insisted the dealership check the EGR cooler when the car was in for service early Nov18; they diagnosed it as defective; replaced it early Dec18 free of charge! My car 2014 320D EffDyn was on 102k miles at the time & full dealer history! Get it checked & replaced! Also, make sure any communication is done via email, that way you have everything documented for evidence sake.
Good luck & kind regards
BMW press release: https://www.press.bmwgroup.com/globa...86151EN/417072

Your EGR failure isn't due to low coolant, you have low coolant BECAUSE of your EGR failure, it's been recalled and a very common problem, they are replacing everyone's with a failure.