Most common 2009 Mercury Mariner Hybrid problems
Share of the 21 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercury Mariner Hybrid complaints by model year
Best Mariner Hybrid years: 2010, 2009. Years to avoid: 2008. Compare all years →
NHTSA defect investigations
Federal safety investigators have looked into 2 possible defects involving the 2009 Mercury Mariner Hybrid:
Pedestrian alert sounds
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles.
Loss of power steering while driving
On May 27, 2014, amended June 2, 2014, Ford Motor Company (Ford) submitted a Defect Information Report (DIR) to NHTSA describing a safety defect that may result in a sudden loss of power steering assist while driving in approximately 746,067 model year (MY) 2008 through 2011 Ford Escape vehicles equipped with electric power assisted steering (NHTSA 14V-284, Ford 14S05).
What 2009 Mercury Mariner Hybrid owners say
Steering
Tl* the contact owns a 2009 Mercury Mariner Hybrid. While driving approximately 25 MPH, the power steering failed without warning and the steering became difficult to turn. The vehicle was not taken to be diagnosed or repaired. The vehicle was not included in NHTSA campaign number: 14V284000 (steering). Neither the dealer nor the manufacturer was notified of the failure. The approximate failure mileage was 96,000.
While making a sharp left turn on a city street the power steering assist system failed completely! I barely avoided a collision. Apparently there have been thousands of similar failures. Why hasn't Ford paid for a repair on a system which is obviously flawed and dangerous when it fails!
Speed control & acceleration
Throttle body problem. All of a sudden I had no power and barely made it home. I had to be towed to ramey Ford in princeton, wv they replaced throttle body but I had to pay $100 deductible. This car was part of a customer service arrangement worked out with NHTSA but the VIN was not included and I was told it was not covered for cost of replacement . This was a very dangerous situation and could have resulted in an accident. I feel the part should have been replaced without any charge since other vehicles in this class had the same problem. There was no offer to reimburse me for my tow since the vehicle was totally disabled. This was a problem that Ford and the NHTSA were aware of and my vehicle had the same problem as others. I feel that I should not have to pay for labor or tow to correct a defect.
I was on my way to drop my 3 month old off at daycare and then to work. I was driving down the highway going 60 MPH with the cruise control set when I feel the car start to jerk back and forth a little. I look at my gauges all are normal except the RPM gauge is jumping up and down then all of a sudden it is kick out of cruise control, and I lose acceleration and a wrench light came on. I was almost hit by 2 vehicles because of the sudden lose on speed. As I was losing acceleration, I was trying not to brake because I thought it was going to die. It did not die but I was not able to go any faster than 25 -30 MPH. I drove it straight to my mechanic and got the code p2112. This is for the throttle body. There was a recall issued on this for the Mercury mariners but it did not include the hybrids. Please help
Brakes
While driving down the road, all of the warning lights on the dash board came on and then the breaks failed. We were able to get to safety after going off the road. When taken into the Ford motor company repair shop they reset the codes and said everything was fine, no parts to repair. Less than 50 miles later, the same thing happened again injuring 3! This time it's the ABS module. After calling the Ford motor company, they refuse to admit there is any problem and no reason for a recall. We were given the NHTSA information to make a complaint and if eventually NHTSA informs Ford that they must do a recall we can be given a refund for our money spent on this repair. Our question is what happens when someone dies? Does it take that before someone is going to do something about the known Hybrid breaking problems? …
The ABS system turn off, took to shop they could not fine trouble it had reset. Today same thing ABS turn off. Will take it in if it does not reset. Both times that it turn off car was parked and I was just starting it to leave..*I would see a warning that says 'regen brake failure.' ABS just went out one day while coming home from the store, and would reset when the car sat for a while. And syre was not fun to drive, but unless it stayed off there was not much they could do at Ford to fine out what was going on. It went off and stayed off and then Ford fixed it, replaced the ABS module it has been o.k. Since then. I did not like the price of the repair at $1933.03. I do not think a women would be able to stop her car if this happen to her while driving you need too much push on the brake to stop even when going slow, and if going the speed posted two feet maybe*smch
2009 Mercury Mariner Hybrid engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 2.5L 4-cyl hybrid | CVT | FWD | 34 / 31 / 32 |
| 2.5L 4-cyl hybrid | CVT | 4WD/AWD | 29 / 27 / 28 |
EPA ratings. Class: SUV.
Frequently asked questions
Is the 2009 Mercury Mariner Hybrid a good car?
Based on 21 owner complaints filed with NHTSA, the 2009 Mariner Hybrid rates average: 31% fewer complaints than a typical year of the Mariner Hybrid at the same age. It is one of the best Mariner Hybrid years by this measure. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2009 Mercury Mariner Hybrid?
The steering — 8 complaints, 38% of all complaints for this model year. Next are the speed control & acceleration (6) and brakes (4).
How many recalls does the 2009 Mercury Mariner Hybrid have?
NHTSA lists no recalls for the 2009 Mercury Mariner Hybrid. You can still confirm with your VIN using our VIN recall check.
What are the best and worst years of the Mercury Mariner Hybrid?
The best years by complaints, compared at the same age, are 2010 and 2009. Years to avoid or approach with caution: 2008. See the full Mercury Mariner Hybrid years comparison.
At what mileage do 2009 Mercury Mariner Hybrid problems happen?
The median mileage reported in complaints is about 93,000 miles; 29% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.