2007 INFINITI QX56

Here is a breakdown of common problems and complaints for the 2007 INFINITI QX56, categorized by system, engine, and transmission options, formatted as requested.

The 2007 INFINITI QX56 is a full-size luxury SUV known for its powerful engine and spacious interior. It came standard with a 5.6L VK56DE V8 engine producing 320 horsepower and 393 lb-ft of torque. This engine was paired exclusively with a 5-speed automatic transmission. Owners generally appreciate the QX56’s towing capacity and comfortable ride, but some dislike its large size and fuel consumption. Common complaints revolve around reliability issues related to the suspension, brakes, and certain electrical components.

Engine

5.6L VK56DE V8

• Timing Chain Tensioner Failure
  • Description/Symptoms: Rattling noise from the front of the engine, especially on startup. This can lead to timing chain slap and eventually engine damage.
  • Solution: Replacement of the timing chain tensioners, guides, and chains.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found
• Exhaust Manifold Cracks
  • Description/Symptoms: Ticking noise, especially when the engine is cold. Can eventually lead to exhaust leaks and reduced engine performance.
  • Solution: Replacement of the exhaust manifold(s).
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Oil spots under the vehicle, burning oil smell. Common leak locations include valve cover gaskets, oil pan gasket, and rear main seal.
  • Solution: Replacement of the leaking gasket or seal.
  • Estimated Cost to Fix: $200 - $800+ depending on the location
  • Recalls: None Found

Transmission

5-Speed Automatic

• Transmission Slipping/Harsh Shifting
  • Description/Symptoms: Delayed or jerky shifts, especially between 1st and 2nd gear, or 2nd and 3rd gear. Transmission may slip under heavy acceleration.
  • Solution: In some cases, a fluid change can help, but often requires valve body replacement or a complete transmission rebuild/replacement.
  • Estimated Cost to Fix: $300 (fluid change) to $2,500 - $4,500+ (rebuild/replacement)
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibration, especially at low speeds or during acceleration. Can also cause stalling.
  • Solution: Replacement of the torque converter.
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found

Suspension

• Rear Auto-Leveling Suspension Failure (Air Suspension)
  • Description/Symptoms: Rear of the vehicle sagging or sitting lower than the front. Air compressor running constantly or not at all. Ride quality is poor.
  • Solution: Replacement of the air springs, air compressor, or ride height sensors. Conversion to traditional coil springs is also an option.
  • Estimated Cost to Fix: $500 - $2,000+ depending on the component(s) needing replacement. Conversion to coil springs $1,000 - $1,500+
  • Recalls: None Found
• Front Strut/Shock Failure
  • Description/Symptoms: Bouncy or unstable ride, excessive body roll during turns, premature tire wear.
  • Solution: Replacement of the front struts/shocks.
  • Estimated Cost to Fix: $400 - $800+
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: The vehicle does not start after sitting for a short period.
  • Solution: Replacing the battery, or diagnosing the cause of the battery drain.
  • Estimated Cost to Fix: $200-$500+ depending on the component(s) needing replacement.
  • Recalls: None Found
• Alternator Failure
  • Description/Symptoms: Battery warning light on, dimming headlights, difficulty starting.
  • Solution: Replacement of the alternator.
  • Estimated Cost to Fix: $400 - $700+
  • Recalls: None Found

Exterior

• Rear Liftgate Strut Failure
  • Description/Symptoms: Rear liftgate will not stay open or opens very slowly.
  • Solution: Replacement of the liftgate struts.
  • Estimated Cost to Fix: $100 - $300+
  • Recalls: None Found

Interior

• Navigation Screen Failure/Malfunction
  • Description/Symptoms: The navigation screen goes blank, freezes, or displays incorrect information.
  • Solution: Replacement of the navigation unit or sending it in for repair.
  • Estimated Cost to Fix: $300 - $1,000+
  • Recalls: None Found
• Climate Control Issues
  • Description/Symptoms: Inconsistent heating or cooling, blend door actuator failure (causing only hot or cold air), or fan motor malfunction.
  • Solution: Repair or replacement of the faulty components.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Summary

The 2007 INFINITI QX56, while offering luxury and performance, suffers from a range of reliability concerns. Engine issues, particularly related to timing chain tensioners and exhaust manifolds, can be costly. Suspension problems, especially with the auto-leveling system, are also common and can lead to expensive repairs. Electrical issues can range from minor annoyances to serious drivability problems. While not all QX56s will experience these issues, potential buyers should be aware of these common complaints and factor them into their purchasing decision. Overall, the severity of potential issues ranges from moderate to severe, and the cost of repairs can be significant.