Greetings.

I'm in the midst of a 4,000 mile road trip with my '97 SR5 2WD 125k 4runner and yesterday my e-brake light came up and i discovered my brake fluid had dropped from the full level to far below the min line, and my brakes had gone squishy.

I topped the reservoir off with new brake fluid to make it another 200 miles and that leaked from Max to Min over the duration of the drive. It seems the leaking is coming from where the Master Cylinder meets the Brake Booster. (Pictures below)

I haven't bled my lines yet because having a visual on the leak I'm assuming it makes sense to swap the Master Cylinder first, but just wanted some input from the board as well.

Thanks in advance!