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Not every angle torque spec is also TTY.
That's a grade 10.9 M12x1.5x85mm. 100NM+90deg does not yield that fastener.
FCP euro and Bentley say to replace them... I just reuse them. And I install them Guten'tight. I'm a bad BMW owner :P
If it's rusty and corroded of course replace it (with something from the local hardware store) Sometimes a bolt is just a bolt.
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