I've had issues with leaks but I could never tell for sure where they were coming from. I used the Elring-Klinger brand gasket last time as opposed of the ZF OEM. The E-K was the same shape but in rubber instead of the thin green material of the ZF. It seems to be holding without leaks, so I ordered another. Pelican Parts of AutohausAZ both have great prices on gaskets.

For the next time I do a fluid change I've purchased button head cap screws in stainless steel with hex heads instead of torx, washers, and lockwashers from McMaster-Carr. I've had enough of stripping the aluminum screws and as long as you use a torquewrench you'll avoid stripping anything in the transmission housing.

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Phil Williams/Torquewrench
2001 330i Orient Blue