2009 Mercury Mariner Mercury Mariner 2009

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2009 Mercury Mariner repairs by problem area

Engine (25%)

Transmission and Drivetrain (30%)

Brakes and Traction Control (4%)

Suspension and Steering (7%)

Electrical and Air Conditioning (27%)

Paint, Rust, Leaks, Rattles, and Trim (2%)

Other (5%)

Chart based on 56 repairs.
See TSBs and recalls for the 2009 Mercury Mariner.

2009 Mercury Mariner repair cost distribution

$2500+ (2%)

$1000 - $2499 (2%)

$500 - $999 (8%)

$100 - $499 (25%)

< $100 (63%)

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Chart based on 52 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2009 Mercury Mariner

Engine not specified

Mercury Mariner in Ohio, United States
Jan 2011 - Mar 2011
Feb 2011

23000 mi

US $10000
I was told there was no problem or they could not replicate it & they all do that. called Ford and told them I have had this SUV in the repair shop 5 times for the same thing and it still doesn't shift right. It gets stuck in gear. Slipsout 

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2009 Mercury Mariner 4dr SUV

240-horsepower 3.0L V6 6-speed automatic FWD

Mercury Mariner in Texas, United States
Dec 2009 - Dec 2012
May 2010

13700 mi
TSB to reprogram transmission for better shifts from 1-2 and 2-3, reducing long term wear on the transmission. 
Dec 2010

21000 mi
Check Engine list was due to Camshaft Position Sensor failure. Part replaced under warranty and was included in a TSB for Marniers made prior to April 2009. 
Feb 2011

22700 mi
Slow to engage gear from stop or accel out of corners. Dealer topped off fluid. A week later I pulled the battery cable to reset and the problem is gone for now. Fluid was a bit low, I suspect may have 1/2 shaft leak problem. 
Aug 2011

29000 mi
Slow transmission leak, TSB called for replacing filler tube/dipstick with updated part. So far, no leak. 
Mercury Mariner in Maryland, United States
Dec 2008 - Jun 2011
Nov 2009

16000 mi
One of the two right front speakers of the Audiophile system damaged at normal volume.  
Jan 2010

18000 mi
Driver side automatic temp control was faulty; would heat up quickly, slowly subside, then turn cold without changing the temperature. 
Mercury Mariner in New York, United States
Jan 2011 - Aug 2016
Feb 2011

12000 mi
Right front axle replaced by Ford to fix a leak in the axle seal. They tried to just replace the seal on two occasions and failed. Ford authorized the whole axle replacement. 
Sep 2014

32000 mi

US $115
replace Blower resistor ( Climate Control ) 
May 2015

35600 mi

US $35
valve stem replaced on lf tire 

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2009 Mercury Mariner 4dr SUV

240-horsepower 3.0L V6 6-speed automatic AWD

Mercury Mariner in Michigan, United States
Oct 2011 - May 2013
Jun 2012

46000 mi

US $900
Evaporator developed hole; A/C would not take a recharge; Dealership suspected road hazard, would not warranty. First diagnosed as leaking shock; later identified as bad gaskets causing leaks throughout drivetrain. 
Aug 2012

48000 mi

US $700
Evaporator developed a hole again, had to be replaced. Purchased a metal mesh grill and had it installed over the front surface of the evaporator. The grill design appears to provide very little protection. 
Dec 2012

53000 mi

US $100
Vehicle struggled under WOT acceleration. Ignition coil packs had to be replaced. 
Mercury Mariner in Virginia, United States
Mar 2012 - Jun 2013
Sep 2012

41000 mi

US $78
Error Code P00012, Camshaft Position - Timing Over-Retarded (Bank 1). I was due an oil change as well. Come to find that low oil will cause the Error Code, which cleared after properly filling the sump. 
Mercury Mariner in Massachusetts, United States
Mar 2009 - Aug 2012
May 2011

17000 mi
Loud clicking noise coming from behind dash, when defrost is on then turned off . 
Sep 2011

19000 mi
Loud squeal from dash, took 2 years to find source. Cabin air filter was never installed & 2 years of crap was sucked into AC/heater blower. It took dealer 3 days to find out filter was a option. I fought with dealer, was covered by warranty. 
Mercury Mariner in Michigan, United States
Jun 2009 - Aug 2015
Mar 2014

58000 mi

US $414
Oil leak at left axle. Replaced seal, bushing & axle inner hub. 
Mercury Mariner in Michigan, United States
Jul 2009 - Jun 2022
Oct 2009

3000 mi
Vehicle wouldn't start, then after starting ran very rough. Computer replaced. 
Mar 2010

8000 mi
Brakes pulling to the right 
Mar 2011

16000 mi
Serious transmission seal leak. Shifting problem with transmission. 
Apr 2011

16000 mi
Seal leak reappeared after more than a week. Fixed again. 
Jan 2012

24200 mi
Transmission was shifting very roughly in cold weather in the early morning. 
Jul 2012

27500 mi
Transmission Seals leaked 
Dec 2012

30000 mi
Rough shifting, Transmission Leak. Fourth repair for this problem. 
Jan 2013

25700 mi
Rough shifting and fluid leak. Repair corrected the problem, but it has returned in the past several days. 
Jun 2013

36000 mi
Rough shifting, fluid leak 
Jul 2014

59700 mi
Rough Shifting, fluid leak 
Dec 2014

67000 mi

US $100
Liftgate latch stopped functioning 
Dec 2015

85000 mi

US $240
Battery required replacement 
Dec 2017

105000 mi
Routine lube, oil and filter 
Mar 2018

109000 mi

US $52
Routine Lube Oil and Filter 
Apr 2018

110000 mi

US $1868
Leaks repaired and recharge Both stabilizer bars were loose. 
Jan 2022

151000 mi

US $1200
Exhaust Manifold 
Jun 2022

156000 mi

US $450
Stabilizers needed to be replaced. 

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2009 Mercury Mariner 4dr SUV

171-horsepower 2.5L I4 6-speed automatic FWD

Mercury Mariner in South Carolina, United States
Mar 2009 - Sep 2009
Apr 2009

18000 mi
Navigation system locked down along with radio 
Mercury Mariner in Texas, United States
Oct 2014 - Nov 2022
Jan 2015

US $950
ABS Module Failed. Lost ABS. Replaced ABS with OEM model. 
Jul 2016

58700 mi

US $125
Windshield Washer Pump failure. Required replacing washer pump. 
Nov 2022

79000 mi

US $200
Battery Corrosion and failure. 2+ year old battery. Easy Replacement. 
Mercury Mariner in Texas, United States
Jul 2008 - Jun 2022
Dec 2009

27000 mi
Transmission not shifting right. Shop took out unit and bench checked. Found metal shavings. Parts were on back order. Ford sent whole new tramsmission. Ford took care of. Still under warranty. Did not cost me a cent. Replaced a motor mount and sub member. 
Mar 2013

95000 mi

US $200
Leaking trans fluid from driver side cv joint coming out of trans. 
Oct 2015

153477 mi

US $35
Rear window above trunk weather stripping leaking. Replaced weather stripping. 
May 2016

167000 mi

US $500
Struts and shocks, were performing poorly 
Jun 2016

169000 mi

US $68
Valve cover gasket replaced because it was leaking oil. 
Aug 2016

162000 mi

US $68
Driver side. Rear door regulator. Cable in regulator broke. 
Jul 2017

193000 mi

US $114
Thermostat letting car run too cool. Replaced thermostat. Water pump leaking. Replaced water pump. 
Nov 2017

203000 mi

US $28
Blend door actuator was hunting. 
Jan 2018

206600 mi

US $150
Vehicle would not start when key was turned sometimes. Replaced steering column ignition housing flange switch. Ford part 9L8Z-3511-A. 
Mercury Mariner in Virginia, United States
Feb 2010 - Jun 2011
Apr 2010

13700 mi
auto transmission now subject to recall, noticed by owner earlier 

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2009 Mercury Mariner 4dr SUV

171-horsepower 2.5L I4 6-speed automatic AWD

Mercury Mariner in Ohio, United States
Jun 2013 - Dec 2013
Jul 2013

61200 mi

US $60
Linkage bushings worn causing rattle 

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2009 Mercury Mariner 4dr SUV

153-horsepower 2.5L I4 Hybrid CVT FWD

Mercury Mariner in Michigan, United States
Oct 2009 - Jun 2018
Oct 2016

118000 mi

US $480
Left heater actuator defective 

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2009 Mercury Mariner 4dr SUV

153-horsepower 2.5L I4 Hybrid CVT AWD

Mercury Mariner in Colorado, United States
Jul 2010 - Sep 2019
Aug 2013

96300 mi

US $75
Replaced air flow mix motors in dash. 
Jan 2016

US $130
Fuel Fill neck no longer sealed; attempted "quick fixes" with no results, replaced the fuel fill neck. 

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See TrueDelta's information for all Mercury models.

2009 Mercury Mariner Repair Histories

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently 2009 Mercury Mariner problems occur, check out our car reliability stats.