One problem related to engine exhaust system has been reported for the 2012 BMW 328. The most recently reported issues are listed below.
I noticed that there was white smoke coming from my hood and air vents while driving. I took my car to the BMW dealer where they said that there's a a leak coming from my valve cover onto my exhaust that is causing the smoke. Parts and labor came to roughly $1500 dollars. I got a second opinion from my mechanic and he stated that my valve cover may not be defective but it may be my gasket and I just need the gasket changed. BMW stated that even though the gasket may not be the issue, they wanted to change the whole cover because they're known to break. They refused to change just the gasket. They are well aware of the issue and that it can cause my car to catch fire. They said that it was a quick fix and all the parts are available because they've had countless customers with the same issue. I am reaching out because I feel BMW is aware of the potential danger this issue can cause.