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NHTSA — Power Train: Automatic Transmission Problems


pretty bad
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
3,839 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.

2010 Mercury Mariner transmission problems

transmission problem

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2010 Mercury Mariner Owner Comments

problem #2

Oct 182011

Mariner 4-cyl

  • Automatic transmission
  • miles


2010 Mercury Mariner. Consumer writes in regards to vehicle hesitation intermittently at various speeds. The consumer stated she began noticing the problem in 2011, after a 2010 update of the transmission software in a factory recall. In addition to the hesitation when trying to accelerate, there were also a few instances where the cruise control seemed to either surge or back down, as if it didn't know quite how to respond, usually, but not always, when on a slight incline. The consumer stated on one occasion, when the vehicle was in park, with the motor idling, she was unable to get the vehicle to go into to gear on the first attempt, when it did shift, it shifted very hard and noisily into gear on the 2nd attempt. Also, the vehicle would shift rough in lower gears, typically from as top or accelerating after slowing to almost a stop. The consumer went to another dealer, after the dealer where she originally purchased the vehicle from, failed to address the problems she experiencing. The second dealer informed her, the transmission valve body was damaged even before the recall came out in 2012. The part was replaced. However, the consumer experienced a hesitation in January 2013. The consumer stated after reading about an investigation of Ford vehicle, which included her model year, she was concerned about the throttle body, which had not been replaced.

- De Pere, WI, USA

problem #1

Oct 162010

Mariner 4-cyl

  • 7,678 miles
I purchased 2010 Mercury Mariner at the end of May 2010, approximately 21 weeks after purchase date my transmission failed; very harsh engagements, vehicle jerks hard between gears, looses power and pops forward when driving steady speed and when approaching an intersection to stop or turn. Safety concerns due to unknown if power failure will occur when there is oncoming traffic or if vehicle will pop me into oncoming traffic or hit someone ahead of me in traffic. Transmission issue also causes poor gas mileage. Ford dealership replaced transmission in 10/16/10 (13 days with dealership) and stated vehicle issues were corrected. I returned vehicle to dealership for continued transmission safety issues (same as noted above) on 12/06/10 (4 days with dealership), again on 1/11/11 (16 days with dealership) after I had submitted 30 demand letter on 12/15/10 to repair or repurchase vehicle and dealership advised each time transmission repair completed. Yet each time transmission issues/concerns still remain. Dealership service manager drove vehicle and agreed there are transmission issues/concerns. Ford customer relations advised a tsb would be issued prior to end of June 2011 that would correct transmission and offered an extended power train warranty of 60 months or 100,000 miles. I have sent emails to Ford customer relations inquiring on the tsb on 6/27/11, 6/29/11 and 7/7/11, no response received. No tsb to date. Ford Motor Company is not standing behind their vehicle production nor the consumer that purchased this vehicle.

- Mckinney, TX, USA

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