2015 INFINITI QX80

The 2015 INFINITI QX80 is a full-size luxury SUV known for its spacious interior, powerful engine, and comfortable ride. It is equipped with a 5.6-liter V8 engine producing 400 horsepower and 413 lb-ft of torque, paired with a 7-speed automatic transmission. Owners often praise its smooth power delivery, luxurious features, and ample cargo space. However, some common complaints include its large size making it difficult to maneuver, lower than average fuel economy, and some reliability concerns.

Engine

5.6L V8 Engine

• Timing Chain Failure
  • Description/Symptoms: Engine rattling noise, especially upon startup. Check engine light may illuminate. Performance may decrease.
  • Solution: Replacement of timing chain, tensioners, and guides.
  • Estimated Cost to Fix: $2,500 - $4,000+
  • Recalls: None Found
• Oil Consumption
  • Description/Symptoms: Excessive oil consumption, requiring frequent oil top-offs between scheduled oil changes. Blue smoke from the exhaust may be present.
  • Solution: Diagnosis to determine the cause of oil consumption (e.g., piston rings, valve stem seals). Repair or replacement of affected components.
  • Estimated Cost to Fix: $1,500 - $5,000+ (depending on the cause and severity)
  • Recalls: None Found
• Catalytic Converter Failure
  • Description/Symptoms: Check engine light illuminated, potential for reduced engine performance and fuel economy. Sulfur smell from exhaust.
  • Solution: Replacement of faulty catalytic converter(s).
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

Transmission

7-Speed Automatic Transmission

• Transmission Slipping/Harsh Shifting
  • Description/Symptoms: Transmission slips between gears, harsh or delayed shifts, or failure to shift properly.
  • Solution: Diagnosis of the transmission to determine the cause (e.g., valve body issues, worn clutches). Repair or replacement of affected components.
  • Estimated Cost to Fix: $500 (for minor repairs) - $4,000+ (for major repairs or replacement)
  • Recalls: None Found

Suspension

• Air Suspension Failure (if equipped)
  • Description/Symptoms: Vehicle sagging on one or more corners, air compressor running continuously, suspension warning lights illuminated.
  • Solution: Diagnosis of the air suspension system to identify the faulty component (e.g., air struts, air compressor, air lines). Replacement of the affected component.
  • Estimated Cost to Fix: $500 - $2,000+ per strut
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Battery drains quickly, requiring frequent jump starts. Difficulty starting the vehicle.
  • Solution: Diagnosis to identify the source of the parasitic drain (e.g., faulty module, wiring issue). Repair or replacement of the affected component.
  • Estimated Cost to Fix: $100 - $500+ (depending on the cause)
  • Recalls: None Found
• Navigation/Infotainment System Issues
  • Description/Symptoms: System freezing, not responding to touch inputs, or displaying incorrect information.
  • Solution: Software update, or replacement of the head unit.
  • Estimated Cost to Fix: $200-$1,500
  • Recalls: None Found

Exterior

• Liftgate Malfunction
  • Description/Symptoms: Power liftgate failing to open or close properly.
  • Solution: Repair or replacement of the liftgate motor, struts, or latch mechanism.
  • Estimated Cost to Fix: $300 - $1,000+
  • Recalls: None Found

Interior

• Seat Heater Malfunction
  • Description/Symptoms: Seat heaters not working or overheating.
  • Solution: Diagnosis to identify the faulty component (e.g., heating element, switch, module). Repair or replacement of the affected component.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Summary

The 2015 INFINITI QX80 can be a reliable and luxurious SUV but is prone to some potential issues, including engine problems like timing chain failure and oil consumption, as well as transmission issues, air suspension failures (if equipped), and electrical problems. Repair costs can vary widely depending on the severity of the issue, ranging from a few hundred dollars for minor repairs to several thousand dollars for major engine or transmission work. Potential buyers should have a pre-purchase inspection performed by a qualified mechanic to identify any existing or potential problems.