I've ALWAYS replaced TTY fasteners, EVERY time!

As the "yield" in the name implies, the fastener has been tightened to the point where material has deformed.

Reuse only results in a failure prone fastener.

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!