YearToAvoid

2008 Mercury Mariner Hybrid Reliability Data: Problems & Recalls

Avoid The 2008 Mercury Mariner Hybrid has a complaint index of 100, the highest of the six model years with data, and ranks worst overall (rank 1 of 6). NHTSA lists 116 complaints, led by engine issues (44 complaints, 38%), with no recalls filed.

Based on NHTSA complaints per model-year, not a reliability rating. Methodology

YearToAvoid Scorecard

Complaint Index
100/100
#1 of 6 Mariner Hybrid years
Verdict
Avoid
vs. other years of this model
Complaints
116
unique NHTSA reports
Recalls
0
distinct NHTSA campaigns
Crashes
2
reported in complaints
Fires
0
Injuries
0
Top issue
Engine
Best nearby year
2010
rated Best
NHTSA overall rating
Not rated
EPA combined MPG
30
31.5 city / 28.5 hwy
Injuries / deaths
0 / 0

Top 2008 Mercury Mariner Hybrid problems

Share of this year’s NHTSA complaints by component group. Groups with 15+ complaints have their own page.

  1. Engine44 (38%)
  2. Brakes35 (30%)
  3. Steering24 (21%)
  4. Electrical System22 (19%)
  5. Fuel System20 (17%)
  6. Transmission & Powertrain16 (14%)
  7. Other5 (4%)
  8. Structure & Body1 (1%)

A complaint can list more than one component, so shares add up to more than 100%. Shares are % of complaints.

What owners report

  • Gasoline engine and electric motor shut down together while driving, showing a "stop safely now" warning with no prior warning.
  • Vehicle stalled at highway speeds and displayed the same "stop safely now" message, sometimes recurring multiple times during a single drive.
  • Brakes failed to slow the vehicle during hard braking or at low parking-lot speeds, in some cases leading to a collision.
  • ABS and check-brake warning lamps illuminated along with inconsistent brake response, described as alternating hard grabbing and soft coasting sensations.
  • Steering lost power assist briefly during turns, then returned suddenly with more force than expected.
  • Left-rear brake vibration occurred under medium pedal pressure, rattling interior trim without a consistent trigger.
2008 Mercury Mariner Hybrid complaints: complaints filed per quarter122010 Q12011 Q32013 Q12014 Q32016 Q22017 Q42019 Q2
116 complaints filed with NHTSA from 2010 Q1 to 2023 Q4; peak 2014 Q3 (12).

2008 Mercury Mariner Hybrid recalls

No safety recalls on record for this model year.

2008 Mercury Mariner Hybrid fuel economy and fuel cost

City
31.5 MPG
Highway
28.5 MPG
Combined
30 MPG
Annual fuel cost (EPA)
$2,175
15,000 mi/yr
Fuel
Regular
Current regular gas
$4.32/gal
national avg.

EPA figures; median across configurations of this model year. Estimate your own cost with the fuel cost calculator.

2008 compared with other Mariner Hybrid years

Complaint Index by model year (0 = fewest issues, 100 = most)0255075100200620072008200920102012
Complaint Index: 0 = fewest issues, 100 = most, relative to other years of this model. Avoid Caution Good Best
YearVerdictIndexComplaintsRecallsMPG
2006Good4034027
2007Caution6031027
2008Avoid100116030
2009Avoid8021030
2010Best209030.5

All Mercury Mariner Hybrid years: best and worst →

Frequently asked questions

Is the 2008 Mercury Mariner Hybrid reliable?
Based on NHTSA owner complaints, the 2008 Mariner Hybrid has the highest complaint index (100) of the six model years tracked and carries an Avoid verdict relative to other years. Engine problems make up the largest share at 38% of complaints.
What is the biggest problem with the 2008 Mercury Mariner Hybrid?
Engine issues are the top problem area, with 44 complaints (38% of the total) and a median mileage at failure of 66,700 miles.
Does the 2008 Mariner Hybrid have any recalls?
NHTSA lists zero recalls for the 2008 Mariner Hybrid.
Which Mariner Hybrid model years are better than 2008?
The 2010 model year has the lowest complaint index (20) and a Best verdict, while 2006 also rates Good with an index of 40, both notably lower risk than the 2008's index of 100.

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.