Mercury Mountaineer Mercury Mountaineer

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Mercury Mountaineer repairs by problem area

Engine (24%)

Transmission and Drivetrain (15%)

Brakes and Traction Control (3%)

Suspension and Steering (28%)

Electrical and Air Conditioning (21%)

Paint, Rust, Leaks, Rattles, and Trim (5%)

Other (4%)

Chart based on 244 repairs.
See TSBs and recalls for the Mercury Mountaineer.

Mercury Mountaineer engine repair cost distribution

$2500+ (4%)

$1000 - $2499 (9%)

$500 - $999 (21%)

$100 - $499 (36%)

< $100 (30%)

Chart based on 53 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2008 Mercury Mountaineer 4dr SUV

292-horsepower 4.6L V8 6-speed automatic AWD

61000 mi

US $986
Driver's side exhaust manifold "ticking" from a leak and was replaced. Belt tensioner pully was also making a noise and replaced at the same time 
88700 mi

US $766
Car missing badly and had problems going over hills. Found bad spark plug and coil, replaced all. Belt tensioner pully bearing going bad, replaced 
55000 mi bank 4 coil went bad due to water getting inside the socket well. Have a slight knocking sound from motor I'm being told is normal but should not be, Ive never heard a motor sound like this one and 2008 at that. 
76300 mi

US $275
Had to replace main heater hose, special part, dealer only item, $200 cheepest online. $75 for labor. Clamp was just seeping coolant but can't use regular hose clamps because Ford chose plastic clamps. The whole assy. had to be replaced. 

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2008 Mercury Mountaineer 4dr SUV

210-horsepower 4.0L V6 5-speed automatic AWD

38700 mi

US $100
After a radiator flush at the dealership, my radiator started leaking. Took the car back to dealer and they pressured tested the radiator to confirm a leak in the seam. My extended warranty covered the repair except for the $100 deductible. 
42800 mi

US $101
Check engine light came on during a 90 mile trip. Took it to dealer and they discovered that the thermostat was stuck open. Replaced thermostat. 
68000 mi

US $130
Check engine light Code P0442. Found a loose connection on the sensor and the filler. There is a recall on this code but the problem was the loose electrical connection and repair was made under extended service plan. I paid a $100 deduct. 
85000 mi Car through a fault code while my wife was driving it back on a three hour trip. Because she said it was running normally I advised her to continue which she did without incident. Using my Dash Command ODBC tool I read the code as a faulty fuel pressure sensor. I cleared the code and the code has nor reappeared and the car has continued to operate properly. I am chalking it up to an intermittent loss of voltage at one of the power pins in the connector, likely due to sudden change to cold temperatures causing a temporary problem. 
85600 mi

US $738
High fuel pressure sensor failed. Required removal of throttle body and intake manifold and new gaskets all around. $390 in parts and $348 in labor and taxes. 

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2007 Mercury Mountaineer 4dr SUV

210-horsepower 4.0L V6 5-speed automatic RWD

94000 mi

US $85
Thermostat housing bad and had to be replaced including theromostat. 

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2007 Mercury Mountaineer 4dr SUV

210-horsepower 4.0L V6 5-speed automatic AWD

52300 mi Radiator was cracked. New radiator was installed. Ignition switch failed, causing lights to come on and seat to move while driving 

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2006 Mercury Mountaineer 4dr SUV

292-horsepower 4.6L V8 6-speed automatic RWD

64000 mi

US $100
Parts were ordered problems was fixed. 

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2006 Mercury Mountaineer 4dr SUV

292-horsepower 4.6L V8 6-speed automatic AWD

31000 mi TSB to remap transmission shift patterns to stop hard downshifts at slow speed. Cracked coolant hose replaced 
99000 mi Heater was not generating sufficient heat. There were intermittent bursts of heat, but the air was largely just warm. Cleared some sort of obstruction from the heater core. 
97000 mi

US $100
Heater still not generating sufficient heat. Radiator discovered to be cracked. Radiator was placed. Check engine light on due to misfiring during acceleration. The error code was non-specific. All of the spark plugs were replaced. 
24400 mi Performed TSB 07-23-2 to correct "bump Stop" and other shifting problems. Repaired cold start surge problem. Repaired cruise control problem. Repaired broken CD player with a replacement unit. 
118300 mi

US $2776
Had changed spark plugs. One broke in head. Dealer had to R&R head. Ford refused to participate in this known design problem. Lisle's extraction tool would not remove broken plug and drove it deeper into head 

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2006 Mercury Mountaineer 4dr SUV

210-horsepower 4.0L V6 5-speed automatic AWD

70700 mi

US $700
Cooler leaked, replaced hoses, coolant, water pump. 
115000 mi

US $1200
radiator leaking 
144100 mi

US $29
Thermostat,cooling 
154000 mi

US $220
Thermostat housing cracked. 
55000 mi

US $1000
Radiator developed a leak along seam, would not hold pressure had to be replaced. 

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2005 Mercury Mountaineer

Engine not specified

208000 mi

US $90
CEL on for EGR malfunction - Replaced EGR with new Motorcraft EGR. Self performed in 1 hour. easy. 

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2005 Mercury Mountaineer 4dr SUV

239-horsepower 4.6L V8 5-speed automatic RWD

149000 mi

US $20
condensation in sparkplug area 
158000 mi condensation in sparkplug area again, just dry it out 

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2005 Mercury Mountaineer 4dr SUV

239-horsepower 4.6L V8 5-speed automatic AWD

110000 mi

US $70
Air pressure sensor warning light. Replaced two sensors. Warning light still on after 400 miles. 
155300 mi

US $300
had to replace coil 
157500 mi

US $1192
fuel pump 
158100 mi

US $622
1 coil, 8 plugs, 6 boots 

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2005 Mercury Mountaineer 4dr SUV

210-horsepower 4.0L V6 5-speed automatic RWD

103400 mi Thermostat housing. 

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2005 Mercury Mountaineer 4dr SUV

210-horsepower 4.0L V6 5-speed automatic AWD

108300 mi

US $100
Plastic thermostat housing block sprung a leak. 
111500 mi

US $200
Changed serpentine belt, belt tensioner, and idler pulley due to belt squealing. 
95000 mi

US $4500
The engine DIED the,after I fixed the transmission. end of the truck. 
103300 mi

US $175
Idler tension pulley and belt. 

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2004 Mercury Mountaineer 4dr SUV

239-horsepower 4.6L V8 5-speed automatic RWD

66000 mi

US $20
CEL came on 2 days after I bought the truck-dang!. Autozone diagnosed code as low coolant temp. I bought a thermostat and gallon of antifreeze at my local mom & pop parts store and replaced the thermostat in under an hour in my garage. 
135000 mi EGR pressure code. Check engine light. Not effecting vehicle performance. 

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2004 Mercury Mountaineer 4dr SUV

239-horsepower 4.6L V8 5-speed automatic AWD

157300 mi

US $350
Both Idler Pulleys need to be replaced. Bearings were shot. 
181300 mi

US $210
Engine would skip on cylinder #8. Spark plug & coil was replaced. Engine oil filter adaptor was leaking oil through the gasket. The gasket was replace & oil change performed. 

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2004 Mercury Mountaineer 4dr SUV

210-horsepower 4.0L V6 5-speed automatic AWD

91600 mi

US $550
Car was idling rough and stalling at stops. CE light on. Fuel Pressure sensor failed, promptly diagnosed and replaced. Part had to be ordered through Ford dealer, no aftermarket part.  
128000 mi

US $420
Won't start. Got full tuneup (plugs and wires) and changed fuel filter 
134000 mi

US $180
Mass air flow sensor failed 
96000 mi

US $1100
Cracked flywheel replaced 
77000 mi

US $175
Rusted exhaust flange, replaced with new split clamp 

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2003 Mercury Mountaineer 4-door

6-cylinder automatic AWD

96000 mi

US $400
Oil leak several gaskets replaced. Still leaking oil so looks like motor mount gasket which is very costly & not worth it since its 11 years old. It's still a great car,drives & looks great. 
98000 mi Oil leak 

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2002 Mercury Mountaineer 4dr SUV

239-horsepower 4.6L V8 5-speed automatic RWD

148000 mi

US $1700
Plastic intake manifold cracked, well known problem for the 4.6l v8 ford engines 

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2002 Mercury Mountaineer 4dr SUV

239-horsepower 4.6L V8 5-speed automatic AWD

167900 mi

US $700
Cracked intake manifold 
48200 mi

US $65
Thermostat locked up. No heat. 
195900 mi

US $700
Vacuum leak 
135000 mi

US $260
Belt tensioner needed replacement. 

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2002 Mercury Mountaineer 4dr SUV

210-horsepower 4.0L V6 5-speed automatic AWD

133000 mi

US $2200
TIMING CHAINS TENSIONERS!!! 
160000 mi

US $600
fuel pump replaced 
166000 mi

US $515
water tube broke. 

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2000 Mercury Mountaineer 4dr SUV

215-horsepower 5.0L V8 4-speed automatic AWD

160500 mi

US $420
radiator was leaking antifreeze and trans fluid 

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See TrueDelta's information for all Mercury models.

Mercury Mountaineer Engine Problems

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 Mercury Mountaineer problems occur, check out our car reliability stats.