Problems · by component

2008 Mercury Mariner power train problems

66 owner complaints to NHTSA about the 2008 Mercury Mariner cite power train, 14% of all 461 complaints for this model year. NHTSA also lists 1 recall on this component.

Complaints
66
14% of all complaints
Crashes
0
Reported by owners
Fires
0
Reported by owners
Injuries
0
Reported by owners
01 —Owner reports

What owners say about the power train

Verbatim from NHTSA complaints, newest first
“The contact owns a 2008 Mercury Mariner. The contact stated while at a stop sign, the vehicle failed to accelerate upon depression of accelerator pedal with the oil warning light flashing on the instrument panel. The contact drove the vehicle despite the failure returning upon restarting the vehicle. The contact had the vehicle towed to an independent mechanic and was informed that the shift lever had disengaged from the transmission. The contact was then referred to the manufacturer after the mechanic discovered NHTSA Campaign Number: 15V606000 (Power Train); which the mechanic linked to the failure. The manufacturer was notified of the failure and informed the contact that the vehicle was not included in the recall. The contact was referred to the NHTSA Hotline to file a complaint. The vehicle was not repaired. The failure mileage was unknown.”
Owner complaint to NHTSAFiled Mar 4, 2025Power trainODI 11646279
“The contact owns a 2008 Mercury Mariner. The contact stated that while idled at a stop, the maintenance warning light illuminated. The contact then stated that while the accelerator pedal was depressed the vehicle failed to accelerate. The contact then stated that he had to apply pressure to the accelerator pedal to increase the RPMs to approximately 3000 to allow the vehicle to proceed forward. Additionally, the contact stated that the brake pedal had to remain depressed to stop the vehicle from rolling on an incline when the vehicle failed to shift in 2nd gear. The contact stated that the vehicle was inspected by a family friend who determined the potential failure was related to NHTSA Campaign Number: 15V606000 (Power Train). The vehicle was not repaired. The dealer nor the manufacturer was notified of the failure. The failure mileage was approximately 309,000.”
Owner complaint to NHTSAFiled Sep 21, 2023Power trainODI 11545897
“I WAS DRIVING THE VEHICLE AND I HEARD SOMETHING CLICK, VEHICLE STARTED SLOWING DOWN, GOT TO SIDE OF THE ROAD, PUT IN PARK, THEN TRIED TO GO DRIVE, NOTHING ,MOVED IT TO DR2,IT MOVED, WENT BACK TO PARK,TRIED GOING INTO REVERSE NOTHING, IT WILL MOVE IN DRIVE BUT NOT REVERSE.”
Owner complaint to NHTSAFiled Apr 26, 2021Suspension, Power trainODI 11413924
“TL* THE CONTACT OWNS A 2008 MERCURY MARINER. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 35 MPH, THE VEHICLE LOSS MOTIVE POWER AND STALLED. ADDITIONALLY, THE VEHICLE FAILED TO OPERATE WHILE IN REVERSE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO WAS UNABLE TO DETERMINE THE CAUSE OF THE FAILURE. THE LOCAL DEALER RIVERSIDE FORD (2089 RIVERSIDE DR, MACON, GA 31204) AND THE MANUFACTURER WERE NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 260,000.”
Owner complaint to NHTSAFiled Apr 26, 2021Power trainODI 11413942
“2008 MERCURY MARINER THROTTLE CONTROL POWERTRAIN LIGHT COMES ON, TRANSMISSION CANNOT GO INTO GEAR PROPERLY, IT STOPS AT 4000 RPM, AND IT STRUGGLES TO GO AT HIGHER SPEEDS,”
Owner complaint to NHTSAFiled Feb 6, 2021Power train, Vehicle speed control, Unknown or otherODI 11395005
“MY POWER STEERING WENT OUT WHILE I WAS DRIVING. I TOOK THIS VEHICLE TO MY MECHANIC AND HE SAID THAT IT WAS RELATED TO THE POWER STEERING RECALL THEY DID ON THIS TYPE OF CAR. BUT WHEN I PUT IN MY VIN IT SAID THIS CAR WAS NOT RECALLED. SO I AM WONDERING IF YOU GUYS SKIPPED OVER MY VEHICLE. I WOULD APPRECIATE IF YOU WOULD LOOK INTO THIS. THANK YOU.”
Owner complaint to NHTSAFiled Apr 19, 2020Steering, Power trainODI 11321578

Showing 6 of 66 reports. Read every report on NHTSA.gov.

Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026NHTSA vehicle page
02 —Related recalls

1 recall on this component

Power train: floor shift

Free remedy

Ford Motor Company (Ford) is recalling certain model year 2001-2008 Ford Escape and Mercury Mariner vehicles manufactured March 31, 2001, to September 1, 2009. The affected vehicles are equipped with either a 2.3L or 3.0L engine and have had their CD4E transmission replaced with remanufactured one that was rebuilt between June 11, 2015 through July 15, 2015. These service repair part transmissions have a shift lever bolt that may not be properly tightened. As a result, the shift control lever could disengage from the transmission without warning.

Power trainReported Sep 29, 2015NHTSA 15V606000
Data from NHTSA Recalls API · synced Nov 10, 2026

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