2012 INFINITI QX56

The 2012 INFINITI QX56 is a full-size luxury SUV powered by a 5.6L V8 engine paired with a 7-speed automatic transmission. Known for its spacious cabin, advanced technology, and powerful performance, with 400 horsepower and 413 lb-ft of torque, the QX56 has also received positive feedback for its comfortable ride and safety features. However, some owners have reported issues with various components of the vehicle.

Engine

5.6L V8

• Ticking or Knocking Noise:
  • Description/Symptoms: A persistent ticking or knocking sound coming from the engine, especially at idle or low RPMs.
  • Solution: Replacing the hydraulic lifters or camshafts.
  • Estimated Cost to Fix: $1,500 - $2,500+
• Oil Leaks:
  • Description/Symptoms: Visible oil leaks around the engine, such as from the valve covers, oil pan, or rear main seal.
  • Solution: Repairing or replacing the leaking components and tightening the seals.
  • Estimated Cost to Fix: $300 - $1,000+
• Variable Valve Timing (VVT) Solenoid Failure:
  • Description/Symptoms: Reduced engine performance, rough idling, and illuminated check engine light.
  • Solution: Replacing the VVT solenoid.
  • Estimated Cost to Fix: $300 - $600+

Transmission

7-Speed Automatic

• Delayed or Rough Shifting:
  • Description/Symptoms: Transmission hesitation or slipping during gear changes, accompanied by jerking or shuddering.
  • Solution: Updating the transmission software, repairing or rebuilding the transmission.
  • Estimated Cost to Fix: $500 - $2,000+
• Overheating:
  • Description/Symptoms: Transmission overheating indicated by illuminated warning lights, a burning smell, or slipping gears.
  • Solution: Cooling system flush, transmission fluid change, or transmission cooler replacement.
  • Estimated Cost to Fix: $200 - $1,200+
• Transmission Control Module (TCM) Failure:
  • Description/Symptoms: Irregular transmission behavior, shifting problems, and illuminated check engine light.
  • Solution: Replacing the TCM.
  • Estimated Cost to Fix: $400 - $800+

Suspension

• Front Strut Assembly Failure:
  • Description/Symptoms: Clunking or knocking sounds from the front suspension, uneven tire wear, and reduced handling.
  • Solution: Replacing the strut assemblies.
  • Estimated Cost to Fix: $600 - $1,200+
• Air Suspension System Malfunction:
  • Description/Symptoms: Uneven ride height, suspension stiffness changes, or illuminated suspension warning lights.
  • Solution: Diagnosing and repairing the air suspension system, including replacing air bags, compressors, or sensors.
  • Estimated Cost to Fix: $500 - $2,500+

Electrical

• Battery Drain:
  • Description/Symptoms: Vehicle battery drains quickly when parked, causing starting problems.
  • Solution: Identifying and repairing electrical components that are drawing power, such as faulty relays or modules.
  • Estimated Cost to Fix: $200 - $500+
• Infotainment System Glitches:
  • Description/Symptoms: Touchscreen freezing, navigation system errors, or audio system malfunctions.
  • Solution: Software updates, resetting the system, or replacing faulty components.
  • Estimated Cost to Fix: $200 - $1,000+

Exterior

• Rear Liftgate Motor Failure:
  • Description/Symptoms: Difficulty opening or closing the rear liftgate, accompanied by a clicking or buzzing sound.
  • Solution: Replacing the liftgate motor.
  • Estimated Cost to Fix: $400 - $600+

Interior

• Climate Control Malfunction:
  • Description/Symptoms: Inability to adjust temperature or airflow, blown fuses, or faulty climate control module.
  • Solution: Repairing or replacing the climate control system components.
  • Estimated Cost to Fix: $300 - $1,500+
• Cruise Control Deactivation:
  • Description/Symptoms: Cruise control system disengages randomly, causing the vehicle to accelerate or decelerate.
  • Solution: Inspecting and repairing the cruise control system, including sensors and wiring.
  • Estimated Cost to Fix: $200 - $600+

Summary

While the 2012 INFINITI QX56 is generally a well-regarded vehicle, it has experienced some issues that can vary in severity and cost. Some common problems include engine ticking, oil leaks, transmission shifting issues, suspension strut failure, and electrical problems. Owners should be aware of these potential concerns and consider regular maintenance and timely repairs to ensure a reliable driving experience.