Brake Drum Wheel Cylinder problems of the 2005 Toyota Highlander

My 2005 Toyota Highlander master brake cylinder looks to be leaking near the brake booster. I know that it was replaced by Toyota dealer under NHTSA campaign number: 10v499000. However I do not remember the year. I was driving on local streets, when I stepped on the brake pedal and it went all the way to the floor. The next time I tried to step on the pedal it was working ok. But then the 3rd time I stepped on the brake pedal it was going all the way to the floor again. This was a shocked since it got me to work 9 hours earlier with no issue. I got home and checked the brake fluid level and looked to be at the correct level. I did not drive until next day to take it to my local mechanic, who told me it was the master brake cylinder. He stated that there was a small leak inside the brake booster and needed to replace the whole master brake cylinder. It still is in the shop, however I remembered that it was "swapped out" with a new one under NHTSA campaign number: 10v499000. Could it be possible that the recalled for the new part is still doing the same thing? I would like to know if I can get replaced again under the recall, or have to pay the $550 for new part and labor. Thank you.