From what I've seen, these head rests are okay. I don't think they are adjustable, but I think some have removed them to fit a baby seat. I've sat in the back of my car and didn't find any issue. Did you sit back there to confirm? I suggest posting a picture or try driving another e93.
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2009 335i 6MT M-Sport AW/CR Convertible
2002 Toyota 4Runner 4wd