2008 Mercury Mariner Hybrid Vehicle speed control Problems
- Complaints
- 11about this part
- Share
- 9%of 116 total for the year
- Median mileage
- 91,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 11 complaints about the vehicle speed control of the 2008 Mercury Mariner Hybrid, 9% of the 116 complaints for this model year. Where a mileage was given, the median is 91,000 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.
“Pcm, stop safely now & shut-down problem and I have a red triangle illuminated on the cluster accompanied by an audible chime. In addition, the message center will indicate stop safely now and the powertrain control module will command the vehicle to shut down. This is where ever you are and it happens really quickly it is for sure a safety hazard.... I don't understand why this has not been recalled, since so many have reported the same problems throughout the years.”
NHTSA complaint #10610456, filed 2014-07, 62,300 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“Had the throttle body fixed once two months ago because I was going 45, my SUV. Hazard light came on and it said to slow down and pull over safely. Then it has happened three more times since I got it fixed, my SUV is in the shop again, I paid 845 last time and I still have $15,000 left to pay on my car. I can't afford to keep paying to get this fixed, let alone the safety issue.the lady two times it happened I had my baby in the car on the freeway and I was in the middle lane and it was raining... It was frightening.”
NHTSA complaint #10644922, filed 2014-10, 112,000 miles“While my wife was driving our 2008 Mercury hybrid mariner on a highway at a speed of approximately 45 MPH, a warning light appeared on the dash (red triangle with and exclamation point) and the vehicle began slowing down in a manner that prevented her from controlling the speed of the vehicle. My wife, fortunately, was able to pull to the side of the highway without incident. The ford dealership's diagnostic test revealed a faulty electronic throttle body and the dealership recommended immediate replacement for safety reasons. …”
NHTSA complaint #10639027, filed 2014-09, 57,870 miles“Driving home from work at 6 pm on monday and I was going 35 MPH and the SUV hazard light came on and then said pull over safely now and I lost power and couldn't accelerate. Im glade I wasn't on the freeway. Took my SUV into ford and they said it was the throttle body. They are fixing it now $845 later im hoping its not going to happen again, but what I have read to a lot of people that have fixed theirs, the problem persists. Im not feeling very comfortable driving my SUV on the freeway, and I have to drive it on there 5 days a week for work. …”
NHTSA complaint #10622393, filed 2014-08, 110,000 milesVehicle speed control: other model years
Other parts of the 2008 Mercury Mariner Hybrid
34 complaintsEngine
28 complaintsSteering
24 complaintsElectrical system
22 complaintsFuel system
18 complaintsTransmission and drivetrain
16 complaintsEngine cooling
13 complaintsOther or unknown
5 complaintsElectronic stability control
2 complaintsHybrid propulsion system
2 complaintsBody 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 Oct 31, 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