One problem related to brake master cylinder has been reported for the 2006 Ford Taurus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Ford Taurus based on all problems reported for the 2006 Taurus.
I suddenly found that my brakes were not working properly when I was going around 50 mph. Took it to the mechanic and he told me that I needed to replace the brake master cylinder and the brake booster. He told me that he sees this problem more with Fords. When I googled a review of the Ford Taurus 2006, the very first consumer feedback that showed up stated that he needed the replace the brake master cylinder right after he got it. I bet Ford knows about this problem. It is so scary to find yourself on the highway without proper working brakes.