M14x1.5 Another one delusion
Concerning BMW differential typ188
It seems to be a popular fallacy in the north (UK and Scandinavian) that E30 has M14x1,5 on the crown gear bolts. Each typ188 has bolt size M12x1.5.
I have been doing with differentials for years. I have never met type188 with M14x1.5. Also in the official documentation of BMW is invariably present thread M12x1.5 of gear ring bolt.