2007 Mercury Mountaineer

The 2007 Mercury Mountaineer is a mid-size SUV that offers a blend of comfort and utility. Engine options included a 4.0L V6 and a 4.6L V8, both paired with a 5-speed automatic transmission. The 4.0L V6 produced around 210 horsepower and 254 lb-ft of torque, while the 4.6L V8 offered approximately 292 horsepower and 304 lb-ft of torque. Owners often praised the Mountaineer for its spacious interior, comfortable ride, and towing capacity. Common dislikes included fuel economy and some reliability concerns.

Engine

4.0L V6

• Timing Chain Rattle/Failure
  • Description/Symptoms: A rattling noise, especially on cold starts, can indicate a worn or stretched timing chain. In severe cases, the engine may misfire or not start.
  • Solution: Replacing the timing chain, tensioners, and guides is necessary.
  • Estimated Cost to Fix: $1000 - $2000+
  • Recalls: None Found
• Camshaft Position Sensor Failure
  • Description/Symptoms: Causes stalling, rough running, check engine light.
  • Solution: Replacement of the sensor.
  • Estimated Cost to Fix: $150 - $300
  • Recalls: None Found

4.6L V8

• Spark Plug Ejection
  • Description/Symptoms: Spark plugs can loosen and eject from the cylinder head, causing a loud popping noise and engine misfire. This is often due to stripped threads in the aluminum cylinder head.
  • Solution: Repairing the threads in the cylinder head with a thread insert kit or replacing the cylinder head.
  • Estimated Cost to Fix: $500 - $2000+
  • Recalls: None Found
• Timing Chain Issues
  • Description/Symptoms: A rattling noise, especially on cold starts, can indicate a worn or stretched timing chain. In severe cases, the engine may misfire or not start.
  • Solution: Replacing the timing chain, tensioners, and guides is necessary.
  • Estimated Cost to Fix: $1500 - $3000+
  • Recalls: None Found

Transmission

5-Speed Automatic (Both Engines)

• Transmission Slipping/Harsh Shifting
  • Description/Symptoms: Transmission slips between gears, shifts harshly, or fails to shift altogether.
  • Solution: Can sometimes be resolved with a fluid change and filter replacement, but often requires a rebuild or replacement of the transmission.
  • Estimated Cost to Fix: $300 - $3000+
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibrating at certain speeds, especially under load. Can also cause stalling.
  • Solution: Replacing the torque converter.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found

Suspension

• Rear Air Suspension Failure (If Equipped)
  • Description/Symptoms: Rear of the vehicle sags, compressor runs constantly or not at all, ride becomes bouncy.
  • Solution: Replacing the air springs, compressor, and/or height sensors. Converting to a traditional coil spring suspension is also an option.
  • Estimated Cost to Fix: $500 - $2000+
  • Recalls: None Found
• Front Suspension Ball Joint Wear
  • Description/Symptoms: Clunking noise from the front suspension, especially over bumps. Loose or wandering steering.
  • Solution: Replacing the worn ball joints.
  • Estimated Cost to Fix: $200 - $500
  • Recalls: None Found

Electrical

• Blend Door Actuator Failure
  • Description/Symptoms: Inconsistent or no temperature control, clicking noise from the dashboard.
  • Solution: Replacing the faulty blend door actuator.
  • Estimated Cost to Fix: $150 - $400
  • Recalls: None Found
• Instrument Cluster Issues
  • Description/Symptoms: Gauges stop working, display flickers or goes blank.
  • Solution: Repair or replacement of the instrument cluster.
  • Estimated Cost to Fix: $200 - $600
  • Recalls: None Found

Exterior

• Liftgate Strut Failure
  • Description/Symptoms: Liftgate will not stay open.
  • Solution: Replace the liftgate struts.
  • Estimated Cost to Fix: $50 - $200
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof won’t open or close, motor is noisy.
  • Solution: Replacing the sunroof motor, repairing the tracks, or replacing the entire assembly.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Summary

The 2007 Mercury Mountaineer has a variety of potential issues ranging from minor electrical faults to more significant engine and transmission problems. Engine issues such as spark plug ejection and timing chain problems can be costly to repair, especially on the 4.6L V8. Transmission issues can also be a source of expense. Suspension problems, particularly with the air suspension, are also common. While some issues are relatively inexpensive to fix, others can lead to significant repair bills. Potential buyers should carefully inspect the vehicle and be aware of these common problems.