Leaks aren't covered by your warranty policy. If you take it off and destroy it, it is pretty easy to tell that is has been off, just from the marks on the bolts.

Do you honestly want to try and commit fraud and see if the dealer calls you out?

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue