That happened to me once. Took my YM diving, water got in. Long story short, movement was damaged beyond repair, Rolex wanted $7,000 (or some other silly money) to fix it. I figured screw it, managed to find a used 3135 somewhere (eBay I think?) and paid a watch repair guy to replace it. Think it cost me less than $2,000 in all, except I can't ever take my YM back to Rolex ever. Expensive lesson, and then some.