>>gnabgi+(OP)
This feels like they want to use trademark law to prevent third-party products. You can't legally produce the screws without baiscally copying the BMW logo onto it. I don't know if a similar argument would hold water for the drivers though.
>>schupp+iv
IIRC in Europe at least that doesn't work because now your third party has the defence of necessity. They didn't want to use your protected mark, but it was necessary or else their product wouldn't work, so, the protection doesn't apply.