2009 Mercury Mariner brakes problems

Filed Dec 4, 2022 · Brakes · OH

While driving vehicle brakes all of sudden go to the floor, no pedal response. This has happened a couple of times without warning. Once when I was approaching an intersection and light changed. My brakes all of the sudden went to the floor and I had to downshift and cut my wheels toward the curb to stop from crashing. Then a couple days later attempting to get it to mechanic it was fine and pumped properly. I wrote it off as a fluke. Then a few months later it happened again. My mechanic can't seem to find the issue and has charged me for new brakes, new master cylinder, new brake line, and another part for the abs power assistant. My car still continues to have this brake malfunction on and off. Somebody is going to end up getting hurt. This obviously is some kind of part defect. Please help!

Filed Jun 30, 2022 · Brakes · 86,000 miles · GA

The contact owns a 2009 Mercury Mariner. The contact stated that while attempting to apply the brake, an excessive amount of pressure was needed to depress the brake pedal before the vehicle stopped. The contact stated that the brake pedal went to the floor. The contact had taken the vehicle to a certified mechanic who was unable to identify the cause of the failure. The vehicle had not been repaired. The contact stated that the failure was related to the federal safety agency Campaign Number: 19V904000 (Service Brakes, Hydraulic). The manufacturer was made aware of the failure and confirmed that the VIN was not included. The approximate failure mileage was 86,000.

Filed Feb 17, 2022 · Brakes · CA

Second time the power brake pedal assembly has failed. The assembly failed in 19th February 2013 and had to be replaced by Fremont Ford. The power brakes failed completely and it had to be towed in. The part is BM6Z-2455-A. The Power brake assembly electronics failed again in January 26 and I have to drive it into the dealership with failing brakes. I was informed that the part is no longer manufactured and is unavailable from Ford. Failure of brake electronics in this hybrid represents a hazard if the brakes fail from failing electronics and the car is unable to stop. We are currently searching for part from a scrapped vehicle. The car is currently at Livermore Ford 1‑925‑273‑7814. I think that the car should be recalled and defects in power brake module investigated and redesigned part should be installed before other cars brakes fail.

Filed Oct 4, 2021 · Brakes · AZ

Couple weeks back, significant other encountered issue with brake signal coming on and needed to pretty much press the brakes to the floor to get it to brake. Took it to a nearby shop and they weren't familiar with the car, so they recommended to bleed the brakes according to error code and online. Signal went away for a bit. Signal came back with no immediate brake issue. Took to the dealership and they replaced some parts which also made the signal disappear for now. The parts were: Booster brake (a booster asy - brake), a bush, a module. Assuming the part replacement effectively hid the issue like a brake bleed. Few days later while driving about 40mph later the brake signal came on, wasn't touching the brakes at the time. Went to brake and they weren't reacting normally and wasn't braking. Had to also pretty much press hard on the pedal and get the pedal to the floor to break. Pulled off to a side road and restarted the car. Issue disappeared upon restart. Assuming something that controls the brake booster turns off.

Filed Jan 19, 2021 · Brakes · 120,000 miles · MI

The brake pedal goes straight to the floor leaves you with no brakes. This is due to the ABS hydraulic control module failing same as other ones in ford and mercury's being recalled. This is terrible and dangerous and they refuse to help even though thousands of customers with mariners and escapes are having identical problems. Does multiple people have to die before they recall these? This happened while on the highway at 65mph. Terrible and dangerous.

Filed Nov 5, 2020 · Brakes · 116,175 miles · SC · crash

My daughter was involved in an accident due to faulty brakes. We have had the vehicle in to have repairs at three different shops, the last two being at ford. The first two shops could never get the brakes right. Ford finally got them to work for a period of time. They went out again. Ford had the car for another month- it takes months every time. Paid another $2445. And still no brakes. Have contacted ford corporate and they refuse to help or give me documentation to that effect. Ford cases are cas-28178357 and cas-27857368. I have two other mariners and this one just isn't right. Please advise my options. I don't want to sell or trade this with a problem that could possibly hurt or kill someone. Thanks!

Filed Oct 29, 2020 · Brakes · 90,000 miles · MI

Our son is driving this car wit 90k miles on it. Had 1200 of break work done after feeling like the pedal was going down too far and he could not stop well and then it ended up needing a new ehcu to the tune of 2600$. This is a very critical component and from what I read, there are a lot of people experiencing this problem. It should not fail and ford as not issued a recall. I called ford to see if there could be any assistance and they said no. Good cars are being junked for this reason and it is a severe safety issue.

Filed Oct 26, 2020 · Brakes · 165,000 miles · IN

When using the brakes there's a loss of about half of the brake pedal, and most likely the ABS system. The part retails for $1,747.32. The problem from talking to mechanics and searching is apparently sticking valve(s) which in turn makes the brake fluid by-pass half of the system. In other words you only have the use of part of the brake system. Our car has 170k miles but that's ~ 90% highway miles, we bought it ~6yrs ago with 15k miles, which means the brakes don't get that much use. The rear shoes were just replaced for the 1st time @ 170k and the front pads have been done once. Ford cares so much about the lives of people driving their cars that they continue to sell the same part (modulator valve - ford (9l8z-2c346-c)) without any engineering changes/updates, even though this is a common problem across car lines and even trucks. They have issued a recall, #19s54 for select 2006-10 ford fusion, mercury milan and lincoln mkz vehicles that exhibit the same issue, "a normally closed valve inside the hydraulic control unit may stick open, which could result in extended brake pedal travel, potentially increasing the risk of a crash.". An interesting point in the recall is this: "the system will be pressure-flushed with dot 4 brake fluid and the dot 3 reservoir cap will be replaced with a new dot 4 cap." our vehicle has a dot3 cap, is dot3 what causes the problem with "stuck or slow-responding valves" per recall, and dot4 keeps valves from sticking or becoming slow acting because of the viscosity difference between the 2? From amsoil "dot 3 is the most common type used in cars and trucks today. Dot 4, however, is gaining popularity due to widespread use of anti-lock braking systems and traction control, which benefit from dot 4 fluid?s lower viscosity." this: "as of 2006, most cars produced in the u.s. Use dot 4 brake fluid." except for ford apparently.

Filed Aug 16, 2020 · Brakes · 150,000 miles · KS

After ABS activated brake padel became soft. My vehicle has a simlar problem expained under ''safety recall 19s54 ' anti-lock brake system hydraulic control unit valve function''. Eventhough ford recalled several unites, my VIN did not list under the recalled units.

Filed Nov 26, 2018 · Brakes, Electrical · 98,291 miles · NM

While traveling approximately 35 MPH, driving in a straight line on a city street in traffic, the ABS abruptly applied the brakes - hard! The ABS light came on and a "check brake system" warning message was displayed. Also, the electrical system shut down and the engine lost power. After about 5 seconds, power was restored and vehicle was able to proceed. This occurred approximately 8 times over a two mile distance. During the last 4 times, the engine died, lost power completely, and needed to be turned off and restarted to continue. This failure was a dangerous safety hazard. Vehicle was towed to albuquerque lincoln volvo. The problem was diagnosed as a failed ABS module, 9l8z. The dealer replaced the ABS module with a faultly module. A second ABS module was installed and the vehicle was deemed repaired. The dealer did not return the defective part for analysis.