This part is listed by BMW as BMW part number 51192334543/51192339218 and is described as F32/F33/F36 M Performance Rear Diffuser (Matte Black).
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This diffuser can not be used on Non M Sport Models, model years 2014 - 2020
For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us 01977 704798.
BMW Fitments:
4 Series
F32/F33/F36 (2014 - 2020) > 420i/d
F32/F33/F36 (2014 - 2020) > 420i/d xDrive
F32/F33/F36 (2014 - 2020) > 430i/d
F32/F33/F36 (2014 - 2020) > 430i/d xDrive
F32/F33/F36 (2014 - 2020) > 435i/d
F32/F33/F36 (2014 - 2020) > 435i/d xDrive
F32/F33/F36 (2014 - 2020) > 440i/d
F32/F33/F36 (2014 - 2020) > 440i xDrive