Mercury Mariner Hybrid owners have reported 2 problems related to brake master cylinder (under the service brakes category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Mercury Mariner Hybrid based on all problems reported for the Mariner Hybrid.
Failure of the regenerative braking system due to a defective master cylinder and/or hydraulic control unit ("hcu"). Very dangerous. . Read more...
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Failure of abs brakes on 2008 Mercury Mariner Hybrid. This has happened to my car twice. Summer of 2009 and the summer of 2010. Both times I have had to replace the master brake cylinder. Symptoms include inconsistent braking response and loss of brake fluid. Driver experiences overly sharp braking and a "grabbing" sensation as well as very soft braking and "coasting" sensation almost as if there are no brakes or very little braking. It is very hard to drive safely in this condition. Both times, repair included replacing the master cylinder with a $1500 bill. This resulted in $3000 in repair costs to avoid continuing to drive the vehicle in an unsafe condition. The master brake cylinder should not have failed once on a 2008 car much less twice and the dealership has as much told me they feel this may be a system design flaw that needs correcting through recall.
| Problem Category | Number of Problems |
|---|---|
| Service Brakes problems | |
| Brake Light On problems | |
| Brake Abs Warning Light problems | |
| Brakes Failed problems | |
| Brake Master Cylinder problems | |
| Abs Brake Fail problems | |
| Brake Drum Wheel Cylinder problems | |
| Brake Sensor problems |