It was a master cylinder as suspected. Dealer service was excellent. Hendrick Acura in Charlotte. They diagnosed the problem within 30 minutes and gave me new TL to drive while they overnighted the part. My MDX was back on the road the next day.
KNKCOOK,knkcook said:My wife and I have had our MDX since march of 2001 and in august of 2001 she was driving the vechicle to work when her brakes completely failed. Took it to the Acura dealer and they found the brake master cylinder failed internally. Acura dealer in Fife replaced it and informed us that no other such reports of brake master cylinder failures in the MDX fleet. I check with their parts Dept. to see if the part in question is use in any other Acura/Honda vechicles, and was told the Honda Odyssey uses the same brake master cylinder.
Well Yesterday my wife had a second horrifying experience with our MDX, the brakes FAILED again! our MDX is in the Acura shop as I write this and there initial report to me was the Brake Master Cylinder appears to have failed internally? My wife was having nightmare from the first experience, now this. I don't think I'll be able to put my wife and kids back into this vechicle.