2009 Mercury Mariner transmission NHTSA complaints: Power Train:Automatic Transmission

NHTSA — Power Train: Automatic Transmission Problems


fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
12,196 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2009 Mercury Mariner transmission problems

transmission problem

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2009 Mercury Mariner Owner Comments

problem #3

Dec 092009

Mariner 4WD 6-cyl

  • 15,000 miles


2009 Mercury Mariner. The rear end of the vehicle makes a squealing noise upon acceleration I took the car back to the Ford dealership in hillsdale. The vehicle was in the shop 12/9/2009 through 12/16/2009. Unable to fix the noise, Ford Motor Company had them tear down the transmission and replace the drive chain. When I picked up the car I was told that the noise was still there and that Ford engineering said it should not be a problem. The noise was still consistent and has grown increasingly louder. Since this initial complaint I have received a recall notice for the transmission solenoid regulator valve. The vehicle has been accelerating when it shouldn't and not accelerating when it should, like when merging into traffic when the transmission would not perform properly.

- Adrian, MI, USA

problem #2

Jan 102010

Mariner 4-cyl

  • Automatic transmission
  • 8,500 miles
Vehicle is a 2009 Mercury Mariner premium (fwd, ivct 2.5 L I4 DOHC, 16 valve, gasoline, automatic transmission [6F midrange], pfi). On 01/10/2010 the throttle body/powertrain indicator icon and service engine soon icon displayed solid illumination after engine warmup. On 01/14/2010, the dealership read the ombd-II malfunction codes and notified owner that the entire automatic transmission assembly (Ford part no. 7000) needed to be replaced. At Ford parts web site, it states that this part is recalled, but no further information is provided; however, this part was received by the dealership and is being installed.

- Hazel Crest, IL, USA

problem #1

Oct 162009


  • 13,088 miles
The contact owns a 2009 Mercury Mariner. While driving approximately 65 to 70 mph on normal road conditions; the transmission slipped with excessive vibration. The engine began to rev and the RPM's were high. Suddenly, pressure was applied to the accelerator pedal, however, the response was minimal. The contact was able to drive onto the emergency lane and resume normal operation. An authorized dealer confirmed that the failure was contributed to the transmission over drive piston. The vehicle was repaired. The failures occurred whenever 5th and 6th gear were engaged. The identical failures occurred on two separate occasions after the service repairs were performed on the vehicle. In addition, the vehicle rolled while stationary on an incline. The contact had concerns of the safety risk involved. The failure and current mileages were 13,088.

- Gainsevoort, NY, USA

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