2009 Mercury Mariner Hybrid brakes NHTSA complaints: Service Brakes, Hydraulic

NHTSA — Service Brakes, Hydraulic Problems


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
37,850 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2009 Mercury Mariner Hybrid brakes problems

brakes problem

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2009 Mercury Mariner Hybrid Owner Comments

problem #1

Sep 012011

Mariner Hybrid 4WD 4-cyl

  • 37,850 miles


This vehicle has lost brakes 3 times. My now 17 year old daughter is the driver! the first time the brake pedal went to the floor and pumping it would not help. Putting the car in neutral and using the emergency brake was the only way to stop the car. A non-Ford car technician told us it was a possible brake booster issue and the best thing to do would be for it to happen again and bring it to Ford for the codes to be read. I drove the car for over a week and it would not repeat the problem. The second time was also around 40 mph and pushing the brakes as hard as possible would only slightly stop the car and it would keep jumping forward. My daughter had to stop with the E-brake. I took it to Ford for diagnosis and repair. Ford replaced the vacuum pump/hose assembly. Then 2 days later, she lost brakes again. Had to use E-brake to stop in busy traffic. The southeast region Ford technician came to diagnosis this car. After 9 days at the shop the brake booster assembly was replaced. We have been told again that this should take care of the problem. Fyi ( each time the car lost brakes, by turning off the car and back on again it would regain them). I am now driving this car to determine if the issue is in fact taken care of. This has been a very scary situation - especially since my daughter is the driver of this vehicle. When reading automobile blogs it appears brakes are an issue not only with the Mariner hybrid, but the escape hybrid as well. I would like this investigated.

- Greenville, SC, USA

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