2008 INFINITI QX56

2008 INFINITI QX56

Overview

The 2008 INFINITI QX56, a full-size luxury SUV, is generally considered a robust vehicle, particularly known for its powerful V8 engine and comfortable ride. As with any vehicle of this age and size, some common areas may require attention. This analysis focuses on documented mechanical and electrical issues beyond routine maintenance, providing insights into potential reliability concerns for owners and prospective buyers. The QX56’s platform shares components with Nissan’s Titan pickup, contributing to its sturdy construction. However, its age means that certain systems, especially those related to electronics and suspension, may be more prone to wear.

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Engine

5.6L VK56DE V8

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: N/A

Transmission

5-Speed Automatic (RE5R05A)

Harsh Shifting / Delayed Engagement

• Symptoms: Jerking or clunking during gear changes, delayed engagement when shifting into drive or reverse.
• Solution: Transmission fluid and filter change, valve body inspection/rebuild, or transmission replacement.
• Cost: $300 - $800 (fluid/filter), $1,500 - $4,000 (rebuild/replacement)

Suspension

Independent Front Suspension / Multi-Link Rear

Air Suspension Leaks (if equipped)

• Symptoms: Vehicle sagging on one side, compressor running excessively, “air suspension warning light” illuminated.
• Solution: Repair or replace air springs, air lines, or compressor.
• Cost: $400 - $1,200 per corner (springs), $500 - $1,000 (compressor)

Worn Ball Joints / Tie Rod Ends

• Symptoms: Clunking noises over bumps, steering wander, uneven tire wear.
• Solution: Replacement of worn suspension components.
• Cost: $300 - $700 per side

Electrical

Body Control Module (BCM)

Intermittent Electrical Gremlins

• Symptoms: Various non-critical electrical systems malfunctioning (e.g., power windows, interior lights, keyless entry), “check engine” light may illuminate without a clear cause.
• Solution: Diagnosis and reprogramming or replacement of the BCM.
• Cost: $500 - $1,500

Infotainment System

Navigation System Malfunctions

• Symptoms: Screen freezing, unresponsiveness, or failure to boot up.
• Solution: Software update, screen replacement, or head unit replacement.
• Cost: $300 - $1,000

Exterior

Body Panels and Trim

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: N/A

Interior

Leather Upholstery

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: N/A

Climate Control System

Blend Door Actuator Failure

• Symptoms: Inability to control temperature or direct airflow (e.g., only hot air, air only from defroster vents).
• Solution: Replacement of the blend door actuator(s).
• Cost: $200 - $500

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Summary Verdict

The 2008 INFINITI QX56 is a generally reliable large SUV, with its robust 5.6L V8 engine being a strong point. The most commonly reported issues tend to be related to the transmission, particularly the 5-speed automatic, which can exhibit harsh shifting. Suspension components, especially the air suspension system if equipped, can develop leaks or wear over time. Electrical gremlins, often stemming from the Body Control Module or infotainment system, are also noted. Interior climate control blend door actuators can fail, affecting temperature regulation. While not overwhelmingly problematic, potential buyers should be aware of these areas and factor in potential repair costs, especially for a vehicle of this age.