Problems · NHTSA complaints

2009 Mercury Mariner Hybrid problems

Owners filed 21 complaints about the 2009 Mercury Mariner Hybrid with NHTSA between Aug 2010 and May 2019. The most-cited component is steering (8).

Complaints
21
Filed with NHTSA
Crashes
2
Reported by owners
Fires
0
Reported by owners
Injuries
0
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Steering8
  2. Vehicle speed control6
  3. Engine4
  4. Fuel/propulsion system3
  5. Electrical system3
  6. Service brakes2
  7. Power train1
  8. Electronic stability control (esc)1
  9. Service brakes, hydraulic1
  10. Service brakes, electric1

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 9, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20102
20112
20121
20130
20141
20153
20165
20173
20182
20192

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Steering

8 reports1 crash
“VEHICLE STEERING IS INTERMITTENTLY GOING OUT AND DRIVER IS UNABLE TO TURN THE VEHICLE. I HAVE CONTACTTED FORD AND THERE IS AN EXISTING RECALL (14S05) FOR THIS VERY ITEM AND MY VEHICLE (YEAR, MAKE & MODEL) IS LISTED BUT THEY SAY MY SPECIFIC VEHICLE DOES NOT QUALIFY.”
Owner complaint to NHTSAFiled May 21, 2019SteeringODI 11209102

Vehicle speed control

6 reports1 crash
“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”
Owner complaint to NHTSAFiled Aug 30, 2017Power train, Vehicle speed control, EngineODI 11020561

Engine

4 reports
“2009 MERCURY MARINER HYBRID WITH 93000 MILES DRIVING 50 MPH ON A SIX-LANE BLVD. HESITATES BRIEFLY, THEN ACCELERATOR CEASES TO FUNCTION COMPLETELY. DESPITE THE EXTREMELY DANGEROUS SITUATION, WE MANAGED TO MANEUVER THE CAR OFF THE ROAD TO SAFETY. WARNING LIGHT (TRIANGLE WITH EXCLAMATION POINT) AND WARNING MESSAGE "STOP SAFELY NOW". THE CAR COMPUTER KNOWS THERE IS A PROBLEM, WHY DOESN'T FORD? THEY CONDUCTED A "CUSTOMER SATISFACTION PROGRAM" FOR MILLIONS OF ESCAPE AND MARINER OWNERS FOR THIS VERY ISSUE - THROTTLE BODY DEFECT - BUT NOT HYBRIDS. WHY NOT? IT COST US $300 AND NEARLY A MULTI-CAR ACCIDENT. FORD NEEDS TO BE HELD ACCOUNTABLE FOR MANUFACTURERS DEFECTS IN ALL CARS, NOT JUST SOME. PUTTING FAMILIES IN HARM'S WAY BECAUSE FORD DOESN'T HAVE THE INTEGRITY TO TAKE RESPONSIBILITY FOR THEIR VEHICLE ISSUES IS COMPLETELY UNACCEPTABLE. THIS SHOULD BE INVESTIGATED, AND FORD NEEDS TO BE HELD LIABLE.”
Owner complaint to NHTSAFiled Nov 7, 2016EngineODI 10924881

Fuel/propulsion system

3 reports
“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. *TR”
Owner complaint to NHTSAFiled Dec 4, 2016Vehicle speed control, Fuel/propulsion systemODI 10929802

Electrical system

3 reports
“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 MANGER AT THE FORD MOTOR COMPANY CUSTOMER SERVICE DOESN'T THINK IT'S AN ISSUE WORTH LOOKING INTO ONLY TO SAY THAT A VEHICLE WITH HIGH MILEAGE SHOULD BE TAKEN CARE OF AND REPAIRED BY THE OWNERS. NOT THAT FORD IS RESPONSIBLE FOR FAULTY PARTS! PLEASE NHTSA DO SOMETHING ABOUT THE HYBRID BREAKING SYSTEM BEFORE MULTIPLE PEOPLE CONTINUE TO BE INJURED OR ARE KILLED!”
Owner complaint to NHTSAFiled May 21, 2015Electrical system, Electronic stability control (esc), Service brakesODI 10717782

Service brakes

2 reports
“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.' *THE 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”
Owner complaint to NHTSAFiled Oct 26, 2016Service brakesODI 10919135
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.