YearToAvoid

2005 Mercury Mountaineer Transmission & Powertrain Problems

NHTSA has 19 owner complaints about transmission problems in the 2005 Mercury Mountaineer, 23% of all 82 complaints for this model year. That is #3 highest transmission complaint count among 6 Mountaineer model years. These complaints report 1 crash. Median mileage at failure: 48,151 miles.

Transmission & Powertrain complaints
19
23% of 82
Crashes reported
1
Fires reported
0
Injuries reported
0
Median mileage
48,151 mi
Related recalls
0

When 2005 Mercury Mountaineer transmission complaints were filed

First complaint Feb 14, 2006, latest Aug 3, 2023.

2005 Mercury Mountaineer transmission & powertrain complaints: complaints filed per month2Feb 2006Mar 2008Jan 2010Dec 2010Feb 2013Feb 2023
19 complaints filed with NHTSA from Feb 2006 to Aug 2023; peak Mar 2008 (2).

Transmission & Powertrain recalls for the 2005 Mercury Mountaineer

No safety recalls on record for this model year.

Transmission & Powertrain complaints by Mountaineer model year

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

  1. 200519 (23%)
  2. 200639 (33%)
  3. 200725 (31%)
  4. 20089 (9%)
  5. 20090 (0%)
  6. 20102 (15%)

Frequently asked questions

Does the 2005 Mercury Mountaineer have transmission problems?
NHTSA has 19 owner complaints about the transmission in the 2005 Mercury Mountaineer, 23% of all complaints for this model year, including 1 that report a crash. Median mileage at failure is 48,151 miles.
Which Mercury Mountaineer year has the most transmission complaints?
The 2006 Mercury Mountaineer has the most transmission complaints (39), compared with 19 for the 2005.
Is there a transmission recall for the 2005 Mercury Mountaineer?
No NHTSA recall campaign for the 2005 Mercury Mountaineer 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.