2008 Mercury Mariner brakes NHTSA complaints: Service Brakes, Hydraulic

NHTSA — Service Brakes, Hydraulic Problems

CarComplaints.com Seal Of This Might Hurt

CarComplaints.com Notes: The 2008-2011 Mercury Mariner has a dangerous problem with the power steering that Ford says they fixed when they didn't -- at least not 100%.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
37,333 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.

2008 Mercury Mariner brakes problems

brakes problem

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2008 Mercury Mariner Owner Comments

problem #3

Aug 242011


  • 56,000 miles


Traveling at 35 mph and up, sometimes the vehicle would shutter and shake. Found a broken ring on the axle caused this problem. Took a few visits to the dealer to find it. It is very scary when it happens and you must pull over and shut the car off. Sometimes it would be weeks before it happened. Also, happened on the highway. This should have been covered under a safety recall. I had to pay for this repair.

- Epsom, NH, USA

problem #2

Jun 292010

Mariner 4-cyl

  • miles
2008 Mercury Mariner. Consumer states safety issues with rotors the consumer took the vehicle to a mechanic to have the vehicle inspected. The mechanic stated the rotors for the front disc brakes were worn, pitted and rusted and needed to be replaced. It was verified when it was discovered that the brake pedal pulsed at speeds of 30 or 40 mph. The consumer then took the vehicle to the dealer who then asserted that the mechanic was wrong and that all vehicles have rust on their rotors. The consumer then took the vehicle back to his mechanic because of a continued pedal pulsation beginning at 30- 40 mph. The consumer then went to another dealership, who did indeed agree that the front rotors were rusted, pitted and unsafe. Also the rear drums were cracked and needed to be replaced. The ABS was inoperative due to the tone rings had fallen off.

- Brecksville, OH, USA

problem #1

Jun 222010


  • 56,000 miles
In December of 2009 I reported an incidence of unintended acceleration. Since then we have not been using the cruise control much. Yesterday I activated the cruise control at 60mph on a long flat area. There is a mountain pass and curves between that area and our home. I hit the brake and slowed down around the 35 mph curves. On the down grade I took it out of over drive and dropped down a gear. The road flattens out again at the bottom but I did not reengage the cruise control. At one point at an intersection I had to brake to ten miles per hour or less for an oncoming car. Just after making a left turn onto our street the car began rapidly accelerating on its own. I didn't have my foot on the gas pedal. Since the road is straight I allowed it to accelerate to see what it would do. It went from 10 mph to 50 mph before my wife asked, "why are you accelerating? I replied, " I'm not. It's doing it on its own." It disengaged as soon as I hit the brake pedal. There is no way this was caused by a floor mat. I was only going about 10mph when it began accelerating and I took my foot off the pedal. The last time I complained to Ford the car was under warranty and had less than 36,000 miles on it. Ford said they couldn't do anything about it since it was intermittent and they hadn't experienced the problem. Another safety problem we have had with the car: When it had 26,000 miles on it the front end began shaking when braking. Ford said the front rotors were warped and resurfaced them under the warranty. They refused to change the pads or install new rotors. About 15,000 miles later it began vibrating again at speeds above 50mph. Now the vibration is severe. We are looking at a complete brake overhaul. We have never detected the brakes being overheated while the car was being driven. Another problem we had was that the trans cooler went out at 26,000 miles. Ford installed a new one under warranty but refused to drain and replace the transmission fluid.

- Bonanza, OR, USA

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