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This is a brand-new, genuine BMW alternator mounting bolt.

The part number is 12318574809, also known as 8574809.

It's an M10x125 hex bolt, originally manufactured in Germany.

This little guy is essential for securely mounting the alternator on a wide range of BMW models, including the 1, 3, and 5 series, as well as performance models like the M2, M3, and M4 (E90, E92, F80, etc.).

It also fits the E60 and E63 6-series.

If you're replacing an alternator or just lost a bolt during a project, this OEM fastener is the correct one to use.




4 out of 5