Ya, I should have let the dealer know but I was deep into a project. They've been leaking for over a year, gotten progressively worse to the point adding fluid every few days isn't cutting it. But as my luck would have it my 2 year warranty ran out in May. I'll have to take them in and see if a shop can figure them out, I don't see how they come apart.Had one cylinder leaking on my 2016 NX4510. Was still on warranty. Dealer claimed there was no rebuild kit available from dealer. They just replaced with a new cylinder ($800 bucks!!) Can't imagine it couldn't be rebuilt.