Three problems related to brake master cylinder have been reported for the 2007 Lincoln MKZ. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Lincoln MKZ based on all problems reported for the 2007 MKZ.
Brake pedal sinks after abs activates it has happened many times even after replacing master cylinder.
The brakes do not function properly. The pedal feel is spongy and the pedal travel is excessive (3-4") before the brakes start to slow the vehicle down. Brakes were fully bled to ensure old fluid with too much moisture in it wasn't the problem. This action didn't fix the problem. Just had a Ford dealer replace the master cylinder--that did not correct the problem. After conducting a web search and talking with the dealer more, apparently the problem is a valve stuck in the open position on the abs system's hydraulic control unit. This appears to be a bit of a common problem with the fusion, Mkz and milan vehicles over numerous years. There also appears to be an updated part number for the hydraulic control unit. This condition is a safety hazard as the brakes do not properly slow the vehicle down when the brakes are applied.
Gentlemen, I own a 2007 Lincoln Mkz with 68,750 miles on it. I put a new master brake cylinder on it on August 16, 2015. The master cylinder was replaced because my brakes were periodically going �soft� after hitting rough patches on a road, striking wet, uneven manhole covers, or hitting slippery conditions which activated the abs system. Since that August installation of a new oem master brake cylinder I have had three more instances where the brakes have gone mushy after various attempts to make a quick stop. I've come to understand the likely defective part is the hydraulic motor control common to the cars under investigation as well as all others utilizing this same part. My point is that it is not just the 2007-2009 Ford fusion or the Mercury milan (which you are investigating) that has these suspected defective brake conditions. My 2007 Lincoln Mkz (and any other Ford, Mercury, or Lincoln automobiles which use this car's same braking system) has this same unsafe design. My latest incident occurred last week when a deer ran out in front of my car on a snowy road. I slammed on the brakes and avoided him. The abs kicked in and brakes have became mushy immediately thereafter. After taking my car in for repairs to the soft brakes, the brakes have not been returned to �normal�. I'm returning to the garage for a �fix� again. The soft brakes cause the car to take extraordinarily above normal distances to stop. I strongly encourage you to review the 2007 Lincoln Mkz for similar defects to that of the Mercury milan and Ford fusion. Although you are reporting no deaths currently as a result of these conditions to the Mkz, one / many are imminent. 475,000 cars all potentially with this same brake design are unsafe. One we know for sure that is certainly unsafe is the 2007 Lincoln Mkz.