This is still a problem that still needs to be resolved with the dealer. If you try otherwise, you will have to pay and will void any further warranty help with the dealer.
I would ask them to give you something in writing that will give you warranty coverage on this item alone pass the time it ran out, if the problem worsens. Because you have notified them in a timely fashion and they have failed to rectify it, I feel they should. You are now going to find out how good your dealer actually is.