I need some ideas here. 2006 GS300AWD with ~35k miles. Overall, it's been a great car. About 1000 miles ago, my brake light started coming on the dash. I took it into the dealer and he said the fluid was a bit low, pressure checked the lines, inspected the pads and said all was good. Just low on fluid. Fast forward 800 miles, same problem. I just added more fluid and all was well. Now the light is on again. Third time in less than 2000 miles that my brake fluid is low. I have zero staining on my garage floor, and not other indication that fluid is leaking out.
Any thoughts, ideas, history, suggestions, etc.? Dealer is at a loss.