YearToAvoid

2009 Mercury Mariner Hybrid Reliability Data: Problems & Recalls

Avoid The 2009 Mercury Mariner Hybrid ranks 2nd worst of 6 model years, with a complaint index of 80 and 21 complaints, rated Avoid. Engine problems make up 43% of complaints, followed by steering issues at 38%.

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

YearToAvoid Scorecard

Complaint Index
80/100
#2 of 6 Mariner Hybrid years
Verdict
Avoid
vs. other years of this model
Complaints
21
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 / 29 hwy
Injuries / deaths
0 / 0

Top 2009 Mercury Mariner Hybrid problems

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

  1. Engine9 (43%)
  2. Steering8 (38%)
  3. Brakes4 (19%)
  4. Electrical System3 (14%)
  5. Fuel System3 (14%)
  6. Transmission & Powertrain1 (5%)

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

What owners report

  • Vehicle fails to respond to brake pedal input, going soft or to the floor with warning lights and audible alerts before the failure.
  • Power steering cuts out for one to two seconds during turns, sometimes causing the wheel to feel locked at low speed.
  • Engine loses throttle control both at highway speed and pulling away from a stop, with a dashboard wrench warning light appearing.
  • Vehicle loses power on the freeway at high speed, dropping acceleration ability, an issue some owners tie to the electronic throttle body.
  • Vehicle unexpectedly loses the ability to stop at low speed near intersections, forcing drivers to steer around obstacles or use the emergency brake.
2009 Mercury Mariner Hybrid complaints: complaints filed per month2Aug 2010Oct 2011Jan 2015Jan 2016Nov 2016Feb 2017Mar 2019
21 complaints filed with NHTSA from Aug 2010 to May 2019; peak Oct 2018 (2).

2009 Mercury Mariner Hybrid recalls

No safety recalls on record for this model year.

2009 Mercury Mariner Hybrid fuel economy and fuel cost

City
31.5 MPG
Highway
29 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.

2009 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
2007Caution6031027
2008Avoid100116030
2009Avoid8021030
2010Best209030.5
2012No verdict010—

All Mercury Mariner Hybrid years: best and worst →

Frequently asked questions

Is the 2009 Mercury Mariner Hybrid reliable?
Based on NHTSA owner complaints and recalls, the 2009 Mariner Hybrid ranks 2nd worst of 6 model years for this model, with a complaint index of 80 out of 100 and 21 total complaints. It is rated Avoid relative to other Mariner Hybrid years.
What are the most common problems with the 2009 Mercury Mariner Hybrid?
Engine problems are the top complaint area, accounting for 43% of complaints with a median failure mileage of 88,181. Steering problems follow at 38%, with a median failure mileage of 107,500.
Does the 2009 Mercury Mariner Hybrid have any recalls?
NHTSA lists 0 recalls for the 2009 Mercury Mariner Hybrid in this data.
Which Mariner Hybrid model years are worse or better than 2009?
The 2008 model year is worse, with a complaint index of 100 and 116 complaints, rated Avoid. The 2010 model year is rated Best with a complaint index of 20 and only 9 complaints.
What is the fuel economy of the 2009 Mercury Mariner Hybrid?
EPA rates the 2009 Mercury Mariner Hybrid at 30 mpg combined (31.5 city, 29 highway), with an annual fuel cost of $2,175.

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.