One problem related to brake sensor has been reported for the 2008 Mercury Milan. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mercury Milan based on all problems reported for the 2008 Milan.
If the brakes are ever hit suddenly, the brake pedal goes all the way to the floor the next time it is used. Braking happens but only when the pedal nearly reaches the floor. This change in pedal location with no warning is very dangerous. The brake will re-set after some time, ranging from a few days to up to a month. I had the brakes servied (all wheels). My mechanic tested the abs sensor and said that was not the problem. He was unable to diagnose the problem.