speaker adapter rear door for BMW E46
thingiverse
This adapter fits rear door speakers for BMW E46 models with 4" (10cm) speakers. It has not been installed in my car yet, so I'm testing its fitment first. Please be aware of this warning before proceeding. The thread is left-handed, and the dimensions are as follows: inner diameter - 88mm, outer diameter - 100mm, and mounting height - 11mm. I hope this information helps someone, and updates on my experience with the adapter will follow shortly.
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