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Electrical systemPart report

2007 Mercury Mariner Electrical system Problems

Complaints
7about this part
Share
21%of 33 total for the year
Median mileage
75,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 7 complaints about the electrical system of the 2007 Mercury Mariner, 21% of the 33 complaints for this model year. Where a mileage was given, the median is 75,000 miles.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“Takata recall I was on the express way in motion and the car shut down meaning that all of the gadges shut down. Then the car just coast until I could pull over without being hurt or hurting other drivers. Nothing showed up just shut down.”

NHTSA complaint #10971929, filed 2017-04, 116,245 miles

“My son was using our car he drove it to work... All was fine...he used the car to go get lunch in the shopping center... Drove back from the shopping center to a parking spot outside his job location... He then completed his shift at dick's sporting goods where my wife and I met up with him...we all proceeded to our car and truck which were parked across from one another...my wife and son got in the Mercury I got in my truck... My son tried to start the Mercury but it would not turn over...my wife tried still would not turn over ... …”

NHTSA complaint #10949952, filed 2017-02, 100,006 miles

“The engine shut down while on the highway and a light appeared on the dash saying stop safely now . I stopped, turned off the engine, and turned it back on. I took it to a an authorized ford repair shop and they said they weren't sure what the problem was. I didn't have another problem for 9 months and then the same thing happened. Again no problem for about 2 months and then it happened again repeatedly. After pulling over and restarting the same problem would reoccur about every 15 miles. I made it to a ford dealership. They are now replacing the coolant pump. …”

NHTSA complaint #10446134, filed 2012-02, 75,000 miles

“2008 Mercury Mariner hybrid no crank. Vehicle was found to have damaged high voltage wiring harness. Harness runs along underneath the passenger side of the vehicle cabin. Harness is partially encased pvc. Pvc was damaged possibly due to road hazard hitting underneath the vehicle. High voltage harness was damaged resulting in entire harness being replaced. Ford would not pay for repair. This is a serious issue and possibly a design flaw. I still have the harness in my possession and would be willing to provide it for purpose of investigation.”

NHTSA complaint #10267617, filed 2009-05, 37,900 miles

“This problem occurs on my 2007 Mercury Mariner hybrid with less than 2,500 miles. When there is a front seat adult passenger the light on the dash intermittently lights to state pass airbag off . The only other time this light is illuminated is briefly during start up. It is the intermittent nature of this light coming on and going off when there is a passenger that causes anxiety for the driver and passenger. There have only been adult passengers in this vehicle. …”

NHTSA complaint #10174039, filed 2006-11, 150 miles

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
201167%
20102911%
2009227%
2008276%
2007721%
200646%
20051015%

Other parts of the 2007 Mercury Mariner

Transmission and drivetrain
11 complaints
Engine
7 complaints
Vehicle speed control
4 complaints
Air bags
2 complaints
Engine cooling
2 complaints
Suspension
2 complaints
Brakes
1 complaints
Other or unknown
1 complaints
Seat belts
1 complaints
Steering
1 complaints
Tires
1 complaints

← All problems reported for the 2007 Mercury Mariner

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology