I WAS DRIVING MY 2009 MERCURY MARINER AND SUDDENLY LOST THE ABILITY TO ACCELERATE. A WRENCH LIGHT ILLUMINATED ON MY DASH AND THE ONLY THING I COULD DO WAS COAST TO A STOP. PUSHING THE GAS PEDAL DID NOTHING. I WAS ABLE TO VERY SLOWLY GET THE CAR TO A PARKING LOT (IT MOVED AT AN IDLE SPEED, BUT WOULD NOT ACCELERATE OTHERWISE). WHEN I GOT TO THE PARKING LOT, I TURNED THE CAR OFF. AFTER WAITING A…
2009 Mercury Mariner powertrain problems
moderate 39 complaints filed with NHTSA · avg repair $2,500
Complaints
39
Recalls
0
Crashes
0
Avg fix
$2,500
What owners are reporting 4 most recent
TL* THE CONTACT OWNS A 2009 MERCURY MARINER. THE CONTACT STATED THAT WHILE DRIVING 65 MPH, THERE WAS A NOISE HEARD FROM THE ENGINE. THE VEHICLE WAS TAKEN TO A MECHANIC WHO INSPECTED THE VEHICLE AND DISCOVERED THAT THERE WAS NO TRANSMISSION FLUID IN THE REQUIRED RESERVOIR. THE MECHANIC INFORMED THE CONTACT THAT THE SEAL FROM THE TRANSMISSION WAS LEAKING FUEL AND REFERRED HER TO A TRANSMISSION SPECI…
DRIVING MY 2009 MARINER PREMIER ABOUT 35/45 MPH WHEN WRENCH SYMBOL COMES ON INDICATING THROTTLE CONTROL POWERTRAIN / TRANSMISSION PROBLEM CAR IS NOT ACCELERATING PROPERLY AND TRANSMISSION IS JERKING WHEN I STEP ON THE GAS PEDAL AND THE CAR SHAKES VIBRATES AND FEELS UNDER POWERED. GOT HOME AND PARKED IT. STARTED IT UP AND NOW CHECK ENGINE LIGHT IS ALSO ON. IS THIS COVERED BY THE RECALL FOR EXTEND…
WHILE DRIVING DOWN THE ROAD ANYWHERE FROM 20-55 MPH, THE CAR SEEMS TO STALL OUT AND THE ACCELERATOR NO LONGER WORKS. YOU HAVE TO PULL OVER AND SHUT THE VEHICLE OFF AND IT WILL START AGAIN. SOMETIMES THE SAME PROBLEM WILL OCCUR AGAIN WITHIN SECONDS, MINUTES, OR DAYS LATER.
Common questions
How serious is the powertrain problem on the 2009 Mercury Mariner?
It's a documented issue but not catastrophic. 39 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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