hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
106,190 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.

2006 Mercury Mariner Hybrid engine problems

engine problem

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2006 Mercury Mariner Hybrid Owner Comments

problem #8

Jun 012016

Mariner Hybrid

  • 148,700 miles


After having a new water coolant pump (the fourth one in my Mariner hybrid) and a new throttle body being put into my car by a Ford dealership, my car is still having the same problems. Now a "service emission sys" warning has come on, and being under 150,000 miles still I contacted Ford to see what could be done since it was "fixed" by them but still has a problem related to the electrical hybrid powertrain, and Ford says there is nothing else that can be done, even though it clearly is under the warranty that they created due to the failures of both parts.

- Norfolk, VA, USA

problem #7

Jun 082015

Mariner Hybrid

  • 92,200 miles
I was driving down the street, and suddenly, the "stop safely" light came. The engine shut off and the temperature light came on in the dash. I was able to get my car started after about 30-45 seconds. I started driving again, but it shut down again a couple minutes later. It has been occurring intermittently since that day, with today being the most recent. I called Ford motors today and was informed that my car is on the recall list. They never sent a letter to me. The representative referred me to the closest dealership in my area, and advised me that any repairs will be free of charge. I don't understand why Ford motors would program this vehicle to completely shut down during travel. God forbid if this happens while driving on a highway. This is a very dangerous so called "safety feature", which needs to be discontinued in the future.

- Philadelphia, PA, USA

problem #6

Jul 172013

Mariner Hybrid

  • 125,224 miles
My son was driving to his work as an emt. I allowed him to use my mariner. Traveling approx 65mph on the 5 freeway South in sunland, he heard the rod go and saw the lights on the dash indicate the engine overheating. He pulled off the 5 freeway and parked wear it was safe and called for help. I had aaa pickup the vehicle and bring it to the mechanic in westlake village ca. They indicated to me that the engine had thrown a rod and would need to be replaced. They thought it might have run out of oil or something else, but bottom line was that the engine was destroyed. They quoted me a price of $15,000 minimum to fix, so I had it towed to my driveway where it has remained since. It wasn't' for 10 months later we would get any indication that something else might have caused this to happen. I last serviced my mariner in March & may of 2013. My new concern putting 2+2 together, is that though the car was due for an oil change, could this catastrophic event have been due to the overheated coolant system that as yet hadn't been recalled? id like to see if any other Mercury/Ford customers experienced this.

- Agoura Hills, CA, USA

problem #5

Sep 202014

Mariner Hybrid

  • 106,000 miles


The contact owns a 2006 Mercury Mariner hybrid. While driving at various speeds, the high temperature warning sensor light illuminated before the vehicle overheated and stalled. The vehicle was taken to the dealer who diagnosed that the hybrid fans were faulty and needed to be replaced. The fans were replaced and the failure was remedied. The contact also indicated that the ABS braking system malfunctioned due to a faulty ABS module that was damaged when the engine overheated. The ABS was not repaired. The manufacturer was notified of the failure. The failure mileage was 106,000. The VIN was not available.

- Berrien Springs , MI, USA

problem #4

Mar 222012

Mariner Hybrid 4-cyl

  • 104,000 miles
Car would not move at all after coming to a stop when making a left turn in the middle of an busy intersection. With the car idling at 1000 rpms, it would not move when I pressed the accelerator. I had to shut the vehicle down completely, restart it, and then it would move forward only if I pressed the accelerator immediately after restarting. If traffic did not allow immediate travel, the car would not move forward as previously described. If you could not proceed immediately this cycle would continue multiple times. This has happened on over 30 separate occasions with this vehicle. This problem caused multiple safety risks from side or rear end collisions.

- Ortonville, MI, USA

problem #3

Jul 252012

Mariner Hybrid 4-cyl

  • 69,500 miles
Driving at highway speeds, vehicle suddenly shut down and displayed a "stop safely now" message on the lcd and a warning light on the dash. The engine just shut off completely, no electric drive either. Extremely dangerous condition. This happened twice. Vehicle restarted within a minute and operated normally for about 30 minutes. This is a common problem with the Mercury mariner and Ford escape versions of this vehicle. There is extensive documentation of this issue here: www.greenhybrid.com/discuss/F26/stop-safely-now-11900/ apparently, most of these cases are caused by failing cooling pumps. I just don't see how Ford could think to program a vehicle to just shut down because a component was overheating" how about a warning light and tone"

- Bryn Mawr, PA, USA

problem #2

Jul 142012

Mariner Hybrid

  • 108,850 miles
The contact owns a 2006 Mercury Mariner hybrid. The contact stated that while driving 35 mph the vehicle stalled with the illumination of the stop engine warning light. The vehicle was unable to be restarted and was towed to a mechanic. After performing a diagnostic, they could not find a failure with the vehicle. The contact picked up the vehicle from the mechanic and on her way home the vehicle stalled again. The vehicle was able to be restarted and taken to the dealer where the contact was awaiting further diagnosis of the failure. The manufacturer was not notified O the issue. The failure mileage was 108,850 and the current mileage was 108,890.

- Bynum, NC, USA

problem #1

May 212012

Mariner Hybrid 4-cyl

  • 95,043 miles
On I-66W vehicle lost engine power at highway speed. Displayed stop safely now and master vehicle electrical hazard warning lamp. The incident was extremely harrowing for the driver as the power cutoff was unexpected and immediate. Coasted to shoulder. A restart, per the owner manual, was attempted but did not work. Transported on flatbed to Ford dealership. Dealership stated hybrid battery harness, hybrid cooling fans, and throttle body needed to be replaced and PCM reprogrammed for $1900 to ¿¿fix issue. Owner requested a new 12V front battery and warning ceased. Owner decided to do some research and test drive short distances. On 5/24 the engine cut off in an office parking lot. Vehicle was able to be restarted and go 4 miles back to residence after the carpet covering the hybrid battery was pulled up and the cabin A/C turned to high in an effort to cool the battery area (it did not feel hot but the owner believed if a temp reading was the cause a few degrees cooler might help). A wealth of info was found indicating this was a known problem and had multiple Ford technical service bulletins issued (09-18-6 Sep 09 hybrid systems - red triangle on/dtc P0A27 set¿). the owner compiled a list of 88 complaint numbers on the NHTSA site that indicate substantially similar experiences from 2005-2008 Ford escape hybrid / Mercury Mariner hybrid owners. Believe root cause is a design flaw in the PCM S/w that removes engine power when a minor deviation from the nominal battery temp range is sensed. Likely contributing issue is a poorly designed hybrid battery cooling system (battery harness, battery cooling fans, mec pump, blend door, relays). The NHTSA is urged to open an investigation into the stop safely now/master vehicle electrical hazard engine shutdowns. Vehicle is not repaired and can be made available for inspection.

- Potomac Falls, VA, USA

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