2010 INFINITI QX56

The 2010 INFINITI QX56 marked a significant departure from its predecessor, moving to a Nissan Patrol-based platform. It was only available with a 5.6-liter V8 engine (VK56VD) producing 400 horsepower and 413 lb-ft of torque, paired with a 7-speed automatic transmission. Owners often praised the QX56 for its spacious interior, luxurious features, and strong towing capability. Common criticisms include its large size, relatively poor fuel economy, and some reliability concerns.

Engine

5.6L VK56VD V8

• Timing Chain Tensioner Failure
  • Description/Symptoms: Rattling noise from the engine, especially on startup. The noise may diminish as the engine warms up. Can lead to more severe engine damage if left unaddressed.
  • Solution: Replacement of the timing chain tensioners and potentially the timing chain itself.
  • Estimated Cost to Fix: $1500 - $3000+
  • Recalls: None Found
• Fuel Injector Issues
  • Description/Symptoms: Rough idle, misfires, poor fuel economy, check engine light. Can be caused by dirty or failing fuel injectors.
  • Solution: Cleaning or replacement of the fuel injectors.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Transmission

7-Speed Automatic (RE7R01A)

• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibration during acceleration, particularly at lower speeds. May also experience slipping or difficulty shifting.
  • Solution: Replacement of the torque converter. In some cases, it may be necessary to rebuild or replace the entire transmission.
  • Estimated Cost to Fix: $800 - $4000+
  • Recalls: None Found
• Valve Body Issues
  • Description/Symptoms: Harsh or erratic shifting, delayed engagement, slipping between gears, or complete loss of certain gears.
  • Solution: Replacement or rebuild of the valve body. May also require flushing the transmission fluid.
  • Estimated Cost to Fix: $500 - $2000+
  • Recalls: None Found

Suspension

• Hydraulic Body Motion Control (HBMC) System Leaks
  • Description/Symptoms: The QX56 has a hydraulic body motion control system that keeps the vehicle level. Leaks can cause the vehicle to not be level and handling performance to suffer.
  • Solution: Repair or replace the HBMC components that are leaking, such as hoses, accumulators, or struts.
  • Estimated Cost to Fix: $500 - $2000+
  • Recalls: None Found
• Air Suspension Compressor Failure (if equipped)
  • Description/Symptoms: Vehicle sagging, especially overnight. Failure of the air suspension compressor to inflate the air springs. “Suspension Fault” warning light on the dashboard.
  • Solution: Replacement of the air suspension compressor. Also, inspect for leaks in the air lines or air springs.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Electrical

• Navigation/Infotainment System Malfunctions
  • Description/Symptoms: Freezing, slow response, or complete failure of the navigation or infotainment system. May also experience issues with the display screen.
  • Solution: Software updates, replacement of the head unit, or repair of faulty wiring.
  • Estimated Cost to Fix: $100 - $1500+
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: Battery draining overnight or within a few days of inactivity. Difficulty starting the vehicle.
  • Solution: Diagnose and repair parasitic drain. Common causes include faulty relays, aftermarket accessories, or a failing alternator.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Exterior

• Power Liftgate Malfunction
  • Description/Symptoms: The liftgate is not opening or closing properly. The liftgate might make strange noises as it opens or closes.
  • Solution: Replacement of the liftgate motor or the struts holding the liftgate up.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Interior

• Seat Heater Failure
  • Description/Symptoms: Seat heaters not working or only working intermittently.
  • Solution: Replacement of the heating element or the seat heater control module.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Summary

The 2010 INFINITI QX56 is known for its luxury and capabilities, but it’s not without its potential problems. The most significant issues tend to revolve around the engine, transmission, and suspension systems. Timing chain tensioner failure and torque converter issues can lead to expensive repairs. Electrical gremlins and interior component failures are also concerns to be aware of. Overall, the severity of potential issues ranges from moderate to severe, and the cost of repairs can be significant. Prospective buyers should have a pre-purchase inspection performed by a qualified mechanic to identify any existing or potential problems.