YearToAvoid

2008 Mercury Mariner Transmission & Powertrain Problems

NHTSA has 66 owner complaints about transmission problems in the 2008 Mercury Mariner, 14% of all 461 complaints for this model year. That is the highest transmission complaint count among 7 Mariner model years. Median mileage at failure: 62,061 miles.

Transmission & Powertrain complaints
66
14% of 461
Crashes reported
0
Fires reported
0
Injuries reported
0
Median mileage
62,061 mi
Related recalls
1

When 2008 Mercury Mariner transmission complaints were filed

First complaint Sep 23, 2008, latest Mar 4, 2025.

2008 Mercury Mariner transmission & powertrain complaints: complaints filed per quarter42008 Q32011 Q42013 Q22015 Q22016 Q42018 Q42021 Q1
66 complaints filed with NHTSA from 2008 Q3 to 2025 Q1; peak 2017 Q4 (4).

Transmission & Powertrain recalls for the 2008 Mercury Mariner

  1. NHTSA 15V606000Sep 29, 2015Transmission & Powertrain57 vehicles

    Power train:automatic transmission:lever and linkage:floor shift

    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.

    Risk: If the shift lever disengages from the transmission, a driver may be unable to shift gear positions and the indicated shift position may not represent the gear position the vehicle is in. Should a disengagement occur while the vehicle is being driven, when the driver goes to stop and park the vehicle, the gear selection indicator may show that the transmission is in the "PARK" position, but the vehicle transmission may not actually be in the "PARK" gear position. If the vehicle is not in the "PARK" position there is a risk the vehicle will roll away as the driver and other occupants exit the vehicle or anytime thereafter. A vehicle rollaway increases the risk of injury to exiting occupants and bystanders.

    Remedy: Ford will notify owners, and dealers will inspect the transmissions and either tighten the manual shift lever bolt or replace the manual shift lever assembly. These repairs will be performed free of charge. The recall began on October 23, 2015. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 15S28.

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 2008 Mercury Mariner have transmission problems?
NHTSA has 66 owner complaints about the transmission in the 2008 Mercury Mariner, 14% of all complaints for this model year. Median mileage at failure is 62,061 miles.
Which Mercury Mariner year has the most transmission complaints?
The 2008 Mercury Mariner has the most transmission complaints (66), compared with 66 for the 2008.
Is there a transmission recall for the 2008 Mercury Mariner?
Yes — 1 NHTSA recall campaign for the 2008 Mercury Mariner concerns the transmission: 15V606000.

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.