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Join Date: Oct 2017
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You just tell aloud what every one here is dreaming of...
I doubt there is or will be such a site someday, otherwise all car manufacturers will go straight to chapter 11. They are making huge money on spares, so they will probably fight very hard to make sure such site never exist.
However, if you are interrested in some suppliers references you may go and fetch to traditional renowned automotive suppliers and with some digging you will find the maker references for some items. It is a very long process though. Moreover it is even more difficult to find some references on the market as the car makers BMW or others, do have exclusive bargaining conditions for some items with their suppliers who are not allowed to distribute any of the covered items out of the dealer network. It depends mainly on who owns the pattend.
Just one example : the spark plugs are NGK brand and did exist before BMW picked it up for the S85. The pattend is owned by NGK in full. Therefore you can find it easily out of the dealership at cheaper cost.
Same with Bremi ignition coils, Bosch injection valves, Mahler filters and so.