We found the same water leak in our 2003 Bav44 but it has taken us a few months of observation (mostly of no leak at all) to work out exactly when it is happening. The leak always happens when we are punching through heavy seas close hauled on port tack – waves blast straight up the gunwale and seem to be penetrating between the hull and the underside of the toe-rail close to or at the fairlead.
Now that we know when to watch for it, it is a minor irritation rather than a major problem. Easiest fix is to stack the mattress cushions on the starboard side and lay a thick towel in the “drip” area. This is not particularly elegant so the first dry weekend we get we will silicone the gap and see if that fixes the issue.
