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Fuel systemPart report

2008 Mercury Mariner Hybrid Fuel system Problems

Complaints
18about this part
Share
16%of 116 total for the year
Median mileage
66,700miles
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.

NHTSA recorded 18 complaints about the fuel system of the 2008 Mercury Mariner Hybrid, 16% of the 116 complaints for this model year. Where a mileage was given, the median is 66,700 miles.

Example complaints

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

“My 2008 Mercury Mariner Hybrid has a dangerous high speed stall condition. It is very serious and puts the vehicle and occupants in a situation that causes a very high risk of a crash. This said, my vehicle is not covered in the current recall? Why not?”

NHTSA complaint #10640472, filed 2014-10, 100,000 miles

“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. …”

NHTSA complaint #11170270, filed 2019-01, 136,500 miles

“Returning from florida to georgia and passed a vehicle at about 70mph and released the accelerator but vehicle kept accelerating. I pressed the brake pedal but vehicle kept accelerating. I pressed the accelerator again and vehicle finally stopped accelerating. Additionally, stop safely now message intermittently occurs at highway speeds and around town in traffic and slows the vehicle to perhaps 10-15mph and tells me to pull over. This has happened randomly at unspecific times and in heavy traffic which could be dangerous. …”

NHTSA complaint #10716173, filed 2015-05, 71,000 miles

“While driving the vehicle shuts off with a red triangle and the display says to pull off safely. This has happened about 6 times already. I have taken it back to the ford dealer and they replaced the throttle body because there is a sensor that fails in the unit and they explained the factory calibrates the whole unit with a steep price tag. Lucky I still have 5000 miles till warranty expires. I guess a number of times it was not a big deal to pull over on the shoulder and restart the vehicle and carry on. …”

NHTSA complaint #10619541, filed 2014-08, 95,000 miles

“This has occurred twice. The first time, (9-6-2010), driving in bumper-to-bumper traffic on the freeway- the light, stop safely now comes on and you cannot use the gas pedal and you have to try to get to the shoulder safely as the car has no power. I waited for half an hour and restarted the car and was able to get to where I had to go. Took it to dealer and they couldn't find anything wrong with it. The 2nd occurrence (march 31, 2012), same thing happened except I was on the freeway with everyone going at least 65 miles per hour and had to get to the shoulder without any power. …”

NHTSA complaint #10454771, filed 2012-04, 51,000 miles

Fuel system: other model years

YearComplaintsShare of year
2010111%
2009314%
20081816%
200726%
200639%

Other parts of the 2008 Mercury Mariner Hybrid

Brakes
34 complaints
Engine
28 complaints
Steering
24 complaints
Electrical system
22 complaints
Transmission and drivetrain
16 complaints
Engine cooling
13 complaints
Vehicle speed control
11 complaints
Other or unknown
5 complaints
Electronic stability control
2 complaints
Hybrid propulsion system
2 complaints
Body and structure
1 complaints

← All problems reported for the 2008 Mercury Mariner Hybrid

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 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