general problems of the 2008 Mercury Mariner Hybrid

11 problems related to power train have been reported for the 2008 Mercury Mariner Hybrid. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mercury Mariner Hybrid based on all problems reported for the 2008 Mariner Hybrid.

1 Power Train problem

Failure Date: 08/28/2018

Tl - the contact owns a 2008 Mercury Mariner Hybrid. The contact stated that when she put her vehicle into park it rolled. The contact stated that her vehicle exhibited the same symptoms as NHTSA campaign number: 15v606000 (power train). The vehicle was not taken to a dealer to be diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 140,000. Jc.

2 Power Train problem

Failure Date: 01/28/2018

We bought vehicle in Jan, 2018 from a private party, as a work vehicle for my husband, who is a usps rural route carrier. Two weeks after purchase, the anti-lock brake light went on, and the car would not stop when it was supposed to, which was very dangerous in winter. We believe the prior owner knew about this. The light would just go on & off with no pattern. About 1 1/2 months later, he was driving on a 2 lane hgwy (55 mph) delivering mail. He went to pull forward but the car made a brief noise and then everything just stopped working. The car wouldn't start, no electrical or lights, he could not even roll the vehicle by himself to a safe place w/out help. The electrical and propulsion simply stopped working; period. We ended up dragging it home. Dealership gave est. Amt of repairs around $18k. I found the recall in 2014 (14s19) for the same thing. The mec pump was replaced in 2014, with a "supplemental" fix in 2015 same issue. This is the exact same issue as the previous recall, which neither Mercury or any dealership wants to honor. I'm guessing there are more hybrid mariners w/ similar issues, but not enough to issue a follow-up recall. So here we are stuck in car repair purgatory. I do believe they should honor the recall now and fix the pump and replace the hybrid battery. Not sure about the brakes, but I have seen a lot of complaints about them as well - again, not enough for a recall, which again. Purgatory. My husband was very lucky. Had it been a diff time of day there would have been much more car & semi-truck traffic on the hwy (speed limit is 55) and with him literally just stopped dead in his tracks, there surely would have an imminent risk of a serious rear-end collison, with potentially deadly injuries. I am looking for help, assistance, guidance and anything else from any source possible to resolve this issue. We are at our witts end!!.

3 Power Train problem

Failure Date: 10/02/2016

Quits running while caution with explanation in middle light appears and wrench light appears. Then notification to stop at once safely. This has happened on freeway. After 15-20 minutes car will crank again but may only go a few feet and stall again, near death experience.

4 Power Train problem

Failure Date: 12/16/2014

Just after starting my car and driving down my street at ~5mph, there was a warning symbol (red triangle) and then message saying "stop safely now. " the vehicle then lost power steering, and power to the engine. I restarted the car and made it ~100ft and the same thing happened again. This also happened several times previously on the highway traveling ~65mph and with the same message "stop safely now" message appeared and immediately lost all power to steering and the engine. I went to the Ford dealership and was told to replace the hybrid coolant pump and blend doors and this fixed the problem for several months until today. I had also just taken the vehicle into the dealership for a recall on the power steering. This loss of power and ability to steer is extremely dangerous! this needs to be recalled!.

5 Power Train problem

Failure Date: 08/29/2014

My vehicle was part of the nationwide recall by Ford this summer. As instructed, I went into the dealership and my car was "given the fix". Not 1 later my power steering in my car has completely gone out. It is very difficult and dangerous to drive my car. I brought my car back to the dealership and was told that my car had already been diagnosed and "fixed" under the recall, so there was nothing further they could do. My car is actually doing the thing that the recall warned about and they sent me away. It has been 4 months, I feel like I take my life into my hands when I drive my car and Ford takes no responsibly.

6 Power Train problem

Failure Date: 08/13/2014

As I was driving down the freeway, my Mercury Mariner Hybrid displayed a "stop safely now" sign on the control panel. Not even a minute later, the car began to shut down and I had to manuever get off the freeway. When I parked the car, I sat for a moment and then the car started right up. I drove another few miles and it displayed the same message and then stopped. It started again and then did the same thing again.

7 Power Train problem

Failure Date: 06/06/2013

Tl- the contact owns a 2008 Mercury Mariner Hybrid. The contact stated while driving 65 mph, the vehicle stalled on several separate occasions without warning. The vehicle was taken to the dealer for diagnosis but they were unable to duplicate the problem. The vehicle was not repaired and the manufacturer was notified. The approximate failure mileage was 74,000. Rvk.

8 Power Train problem

Failure Date: 09/29/2012

This would be the second un-warned total loss of power on a freeway. Having coasted out of traffic on the first unwarned engine / propulsion system shut-down in fast-moving freeway traffic, managed to find wide-enough section of outside shoulder to come to a stop. But being stuck in 10pm darkness on a narrow shoulder was too dangerous to consider remaining there. Once stopped, I shifted the transmission to park, cycled ignition off then to start engine restarted, dash warning lamps came on- then cycled off normally, engine ran smoothly. Note: the only way to attempt to restart the hybrid drivetrain is to shift the transmission into park . . It doesn't work in neutral . . And there was no way I was going to try to put the trans in park in 72-75 mph freeway traffic in 10pm darkness. Accelerated moderately into merging lane, entering gap in n/b traffic to re-enter I-5 traffic hoping to get past sr-2 to more-familiar exit within 2 minutes, and at speed ~ 55 mph drive train died again (same warning tone and light. . . And same "too little too late" stop now warning text). Again had to hunt for a wide-enough section of outside shoulder to stop and take stock of dangerous situation. Shut off engine, moved trans into park tried restart - again, engine started and settled to normal operation - no warning lights remained on. Able to re-enter traffic and transition off I-5 fwy. . . But only escape was to another freeway (sr-2). Kept speed below 45mph on that freeway until able to exit freeway. This was the second un-warned total loss of power on a freeway.

9 Power Train problem

Failure Date: 09/29/2012

This would be the second un-warned total loss of power on a freeway. Having coasted out of traffic on the first unwarned engine / propulsion system shut-down in fast-moving freeway traffic, managed to find wide-enough section of outside shoulder to come to a stop. But being stuck in 10pm darkness on a narrow shoulder was too dangerous to consider remaining there. Once stopped, I shifted the transmission to park, cycled ignition off then to start ? engine restarted, dash warning lamps came on- then cycled off normally, engine ran smoothly. Note: the only way to attempt to restart the hybrid drivetrain is to shift the transmission into park . . It doesn't work in neutral . . And there was no way I was going to try to put the trans in park in 72-75 mph freeway traffic in 10pm darkness. Accelerated moderately into merging lane, entering gap in n/b traffic to re-enter I-5 traffic ? hoping to get past sr-2 to more-familiar exit ? within 2 minutes, and at speed ~ 55 mph ? drive train died again (same warning tone and light. . . And same "too little too late" stop now warning text). Again had to hunt for a wide-enough section of outside shoulder to stop and take stock of dangerous situation. Shut off engine, moved trans into park tried restart - again, engine started and settled to normal operation - no warning lights remained on. Able to re-enter traffic and transition off I-5 fwy . . But only escape was to another freeway (sr-2). Kept speed below 45mph on that freeway until able to exit freeway. This was the second un-warned total loss of power on a freeway.

10 Power Train problem

Failure Date: 05/16/2012

A "stop safely now" warning message came on when I was driving on the freeway at 60 miles per hour. The car immediately lost power and became difficult to steer. I pulled over to the right shoulder as safely and quickly as possible. This has occurred multiple times.

11 Power Train problem

Failure Date: 06/06/2010

Second unwarned total shut-down of all power on roadway - this one just 17 days after repairs and reprogramming by Ford dealership following first instance, which cut gas engine and electric motor power while traveling on los angeles freeway. This power shut-down occurred while trying to pull from parallel park spot onto busy blvd - lost all power 2 feet into traffic, able to roll back into curb before traffic reached me around semi-blind curve. After the first in-use failure on 5-17-10, I simultaneously reported the malfunction to Ford customer relations (case# 1432331380), and presented the vehicle for repair to cerritos [the following quotes from text of service record]; tech performed `eec test, revealing fault-codes: b1239, p1a0c and p0562. The tech also "found TSB (tech service bulletin) 07-25-12 with concern resolution" & he "contact[ed] Ford technical service hotline with concern. " the tech "replaced the auxiliary airflow mode door actuator and reprogrammed the traction battery control module to latest calibration 8m64-10b687-ag. Final eec test passed. " I was also informed that the part number for the replacement `airflow mode door actuator' differed from original, so the component has apparently been re-designed - but neither my wife nor I have received warnings from Ford that updates/repairs were recommended on either of our 2008 Mariner Hybrids. This originally smelled like a `silent recall' to me. . . But this doesn't even rate as a `recall', because the work performed did not prevent the second occurrence of the equivalent malfunction just 17 days later. This is a totally unacceptable failure mode for any consumer transportation vehicle, because it occurs without warning, and leaves the driver completely defenseless, and with severely-reduced response options.


Other Power Train related problems of the 2008 Mercury Mariner Hybrid


Fuel Economy of Mariner Hybrid Vehicles
Mariner Hybrid Service Bulletins
Mariner Hybrid Defect Investigations