One problem related to engine belts and pulleys has been reported for the 2014 BMW 328. The most recently reported issues are listed below.
Fault in airbag on screen, comes on and off. Started around 61,513 miles. Exact message "fault in airbag, belt rensioner or belt-force limiter. Few days later, check engine comes on, along with high rpm's, while struggling to accelerate. 12/10/2018 engine is extremely loud and dropping off at dealer. Also back tail lights have moisture, back passenger was replaced a year ago. Driver side now needs replacing.