Infiniti QX56 reliability: common problems by model year
Across 2 model years, the Infiniti QX56 has 127 owner-filed NHTSA complaints and 4 recalls on record. The most-reported areas are service brakes and hydraulic. 2004 drew the most complaints (106), 2007 the fewest (21).
2
Model years tracked
127
Owner complaints
4
Recalls
106
Median per year
Source: NHTSA complaints and recalls filed for Infiniti QX56 vehicles (US, public record). Typical used asking price $9,199–$11,195.
Which QX56 years have the most problems?
Complaint volume by model year. Raw NHTSA totals, not adjusted for sales volume or time on the road, so older and higher-selling years accumulate more. Every year links to its full breakdown.
Mixed sentiment with a clear generational divide. The first-generation QX56 (2004-2010) is generally viewed as a robust, reliable, and capable full-size SUV with a "bulletproof" V8 powertrain, offering significant value on the used market due to high depreciat
Premature catalytic converter failure: Very expensive repair ($1,700-$6,000 for parts), often occurs shortly after warranty expiration, can cause misfires and running rich. Frequency: very frequent.
Timing chain system failure: Causes loud whistling/whining noise, loss of power, can lead to catastrophic engine damage with metal in oil; repair costs extremely high ($4,000-$13,500). Frequency: very frequent.
Excessive fuel consumption: Real-world mileage reported as low as 11-12 MPG. Frequency: very frequent.
Electrical/battery drain issues: Batteries reported to die every 24 months; parasitic drain suspected; issues with starting, voltage fluctuations, and various electronic component failures (HVAC, dashboard lights, navigation). Frequency: recurrent.
Transmission concerns: Includes torque converter shudder at highway speeds, slipping, and isolated reports of TCM (Transmission Control Module) failures that are expensive and difficult to repair. Frequency: recurrent.
Owner insights cover all generations of the QX56. Individual model years are broken down above.