I bought new a BMW Tourer 520d in July 2016, it now has covered 11,000 miles. However, drivetrain fault indication recently appeared and the car fell into limp home mode. On contacting my local BMW dealer, they couldn't see the car for a week and advised me to contact BMW Assist. A BMW Assist technician came to my home and replaced the EGR valve. On inspection, I found that the valve was seized through a build up of soot. I also noted that the technician had a small pile of these valves in his vehicle. I asked why he carries these valves, he replied that he is always replacing this valve. It's clear that this valve is not fit for purpose and with a little engineering, it could be designed not to fail due to soot build up. Do you know of any action that BMW is planning to assist owners of this problem? I could not get an answer to this issue from BMW.