Vehicle shut down while driving on the interstate, immediately losing all power. Message on dash read "stop safely now". this is a very dangerous issue. Driving on the interstate at 65 mph & losing all ability to accelerate or maintain speed is very scary. Making matters worse, this occurred during a pouring rainstorm & in a construction zone. I pulled over and turned off ignition. I was able to restart the vehicle. It then shut down repeatedly every 2 miles. The only way to restart was to pull over and turn off the ignition. I gimped it to the car dealer. Now have a $700 bill to fix the airflow mode door actuator and the motor cooling pump. We were told there was a short that was keeping the cooling pump from working. Thus the engine was overheating and shutting off. Having read similar complaints, I am concerned that this is a common issue with this vehicle.

- Omaha, NE, USA

2008 Mariner hybrid / 67000miles. Engine failure. Was able to limp off highway. After waiting several minutes car restarted and was able to drive approx. 5 miles before it shut off again. Drove to dealer with several shutdowns. Dealer states car needs electronic cooling pump and cht sensor at a cost of $1275. Car is still sitting in dealership waiting for my decision to repair or not. Car was not abused. Mostly only one passenger. Car was serviced regularly as per specs at dealership.

- Monroe Twp, NJ, USA

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.

- Long Beach, CA, USA

On-freeway gas engine/electric motor shut-down. Driving in morning rush-hour traffic approximately 15 minutes after cold start in 60-degree weather, both the gasoline engine and the electric motor propulsion systems shut-down together without prior warning while the vehicle was in motion - "stop safely now" was the `too-little-too-late' info on the instrument panel. Neither power mode would restart with trans in neutral (I refused to try cycling ignition key to off, and risk steering lock). Fortunate to coast onto shoulder, where I had to move gear selector to park, turn ignition key full-off and then back to start, at which time normal operation resumed. Total loss of both power sources while in-use on a freeway ' and unable to re-activate without shifting transmission into park is absolutely inexcusable and unacceptable!

- Long Beach, CA, USA