2010 Mercury Mountaineer

Introduction

The 2010 Mercury Mountaineer is a mid-size SUV that offers a comfortable ride and ample space for passengers and cargo. It is available with a choice of two engines and two transmission options:

• 4.0L V6 engine: 210 horsepower and 250 lb-ft of torque
• 4.6L V8 engine: 292 horsepower and 315 lb-ft of torque
• 5-speed automatic transmission
• 6-speed automatic transmission (available with 4.6L V8 engine only)

Owners appreciate the Mountaineer’s roomy interior, powerful engine options, and excellent towing capacity. However, some have reported various issues with the vehicle.

Engine

4.0L V6

• Timing chain tensioner failure: The timing chain tensioner can fail, causing the timing chain to skip or break. Symptoms include engine noise, rough running, and a loss of power. The solution involves replacing the timing chain tensioner and possibly the timing chain itself. Estimated cost to fix: $500 - $1,000+
• Intake manifold gasket leak: The intake manifold gasket can leak, causing a loss of engine coolant. Symptoms include overheating, a decrease in engine performance, and a sweet smell from the engine compartment. The solution involves replacing the intake manifold gasket. Estimated cost to fix: $200 - $300+

4.6L V8

• Spark plug failure: The spark plugs can fail prematurely, causing misfires and a loss of engine power. The solution involves replacing the spark plugs. Estimated cost to fix: $100 - $200+
• EGR valve failure: The EGR (exhaust gas recirculation) valve can fail, causing engine performance problems and increased emissions. The solution involves replacing the EGR valve. Estimated cost to fix: $250 - $400+

Transmission

5-speed automatic

• Transmission shudder: The transmission may shudder or vibrate during acceleration or gear changes. The solution may involve replacing the transmission solenoids or the torque converter. Estimated cost to fix: $500 - $1,500+
• Transmission slipping: The transmission may slip or lose power while driving. The solution may involve rebuilding or replacing the transmission. Estimated cost to fix: $1,500 - $3,000+

6-speed automatic

• Transmission overheating: The transmission may overheat and enter limp mode. The solution involves replacing the transmission cooler. Estimated cost to fix: $200 - $400+
• Shifting problems: The transmission may shift erratically or refuse to shift. The solution may involve replacing the transmission control module or the transmission itself. Estimated cost to fix: $500 - $2,000+

Suspension

• Sway bar links: The sway bar links can wear out or break, causing noise and poor handling. The solution involves replacing the sway bar links. Estimated cost to fix: $100 - $200+
• Strut mount bearing failure: The strut mount bearings can fail, causing noise and a deterioration in ride quality. The solution involves replacing the strut mount bearings. Estimated cost to fix: $200 - $400+

Electrical

• Alternator failure: The alternator can fail, preventing the battery from charging. Symptoms include dim headlights, a flickering dashboard, and a dead battery. The solution involves replacing the alternator. Estimated cost to fix: $300 - $500+
• Battery drain: The battery may drain prematurely, unable to hold a charge. The solution may involve testing and replacing the battery or diagnosing and repairing the electrical system. Estimated cost to fix: $100 - $500+

Exterior

• Rear liftgate hinge failure: The rear liftgate hinges can fail, causing the liftgate to sag or fall off. The solution involves replacing the liftgate hinges. Estimated cost to fix: $500 - $700+
• Tailgate seal leak: The tailgate seal can leak, allowing water to enter the cargo area. The solution involves replacing the tailgate seal. Estimated cost to fix: $100 - $200+

Interior

• Dashboard rattles: The dashboard can develop rattles or squeaks, especially over rough roads. The solution may involve tightening loose screws or replacing trim pieces. Estimated cost to fix: $100 - $300+
• Seat heaters not working: The seat heaters may fail to work properly, or only work intermittently. The solution may involve replacing the seat heater element or the wiring harness. Estimated cost to fix: $200 - $500+

Summary

The 2010 Mercury Mountaineer has received mixed reviews from owners. While some praise its comfort, power, and towing ability, others have reported various issues with its engine, transmission, suspension, electrical system, and interior. The severity of the issues and the cost of repairs can vary depending on the specific problem encountered.