YearToAvoid

2009 Mercury Mariner Transmission & Powertrain Problems

NHTSA has 44 owner complaints about transmission problems in the 2009 Mercury Mariner, 14% of all 315 complaints for this model year. That is #3 highest transmission complaint count among 7 Mariner model years. Median mileage at failure: 69,000 miles.

Transmission & Powertrain complaints
44
14% of 315
Crashes reported
0
Fires reported
0
Injuries reported
0
Median mileage
69,000 mi
Related recalls
0

When 2009 Mercury Mariner transmission complaints were filed

First complaint Nov 17, 2009, latest Feb 9, 2023.

2009 Mercury Mariner transmission & powertrain complaints: complaints filed per month4Nov 2009Jan 2012Feb 2013Aug 2013Dec 2013Jul 2014Jan 2016Jan 2018
44 complaints filed with NHTSA from Nov 2009 to Feb 2023; peak Aug 2013 (4).

Transmission & Powertrain recalls for the 2009 Mercury Mariner

No safety recalls on record for this model year.

Transmission & Powertrain complaints by Mariner model year

Raw complaint counts per model year; newer years have had less time to accumulate complaints.

  1. 200515 (22%)
  2. 200611 (17%)
  3. 200711 (33%)
  4. 200866 (14%)
  5. 200944 (14%)
  6. 201060 (22%)
  7. 201124 (28%)

Frequently asked questions

Does the 2009 Mercury Mariner have transmission problems?
NHTSA has 44 owner complaints about the transmission in the 2009 Mercury Mariner, 14% of all complaints for this model year. Median mileage at failure is 69,000 miles.
Which Mercury Mariner year has the most transmission complaints?
The 2008 Mercury Mariner has the most transmission complaints (66), compared with 44 for the 2009.
Is there a transmission recall for the 2009 Mercury Mariner?
No NHTSA recall campaign for the 2009 Mercury Mariner is classified under transmission & powertrain. Complaints alone do not trigger a recall; check the full recall list and your VIN.

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.