YearToAvoid

2011 Infiniti QX56 Fuel System Problems

NHTSA lists 20 Fuel System complaints for the 2011 Infiniti QX56, 26% of that year's 78 total complaints, the highest share among the years shown. Median mileage at failure was 102,000. No related recalls are listed in this data.

Fuel System complaints
20
26% of 78
Crashes reported
0
Fires reported
0
Injuries reported
0
Median mileage
102,000 mi
Related recalls
0

Typical fuel system symptoms owners report

  • Fuel line fittings or clamps near the back of the engine on the driver's side leak fuel steadily, sometimes forming a puddle under the vehicle.
  • Fuel gauge readings jump erratically between empty and full within seconds, which owners tie to a faulty fuel level sensor.
  • Owners report catalytic converter failures that trigger a check engine light and a P0420 code, sometimes after replacing an oxygen sensor.
  • Some drivers experienced stalling or loss of power along with P0090 and P0087 codes, traced to a failing high pressure fuel pump.
  • A few owners describe a fuel odor under the hood combined with the accelerator failing to respond, linked to a possible fuel rail sensor failure.
  • One owner reported the fuel tank draining much faster than expected, getting far fewer miles per tank than normal.

When 2011 Infiniti QX56 fuel system complaints were filed

First complaint Oct 19, 2015, latest Jun 2, 2023.

2011 Infiniti QX56 fuel system complaints: complaints filed per month2Oct 2015May 2017Oct 2018Aug 2019Jul 2020Feb 2022
20 complaints filed with NHTSA from Oct 2015 to Jun 2023; peak Jul 2016 (2).

Fuel System recalls for the 2011 Infiniti QX56

No safety recalls on record for this model year.

Fuel System complaints by QX56 model year

Raw complaint counts per model year; newer years have had less time to accumulate complaints.

  1. 200525 (31%)
  2. 20066 (8%)
  3. 20071 (5%)
  4. 20089 (17%)
  5. 20092 (29%)
  6. 20100 (0%)
  7. 201120 (26%)
  8. 20127 (12%)
  9. 20132 (6%)

Frequently asked questions

How common are fuel system complaints on the 2011 Infiniti QX56?
NHTSA lists 20 Fuel System complaints for the 2011 QX56, which is 26% of the 78 total complaints filed for that model year, the highest share among the years shown in this data.
Is there a recall for the 2011 Infiniti QX56 fuel system?
This data shows no related recalls listed for the 2011 QX56 fuel system, though several owners reference an earlier 2010 fuel sensor recall on other model years.
At what mileage do fuel system problems typically show up on the 2011 QX56?
The median mileage at failure across these complaints is 102,000 miles.
Did any 2011 QX56 fuel system complaints involve fires or crashes?
No. NHTSA records zero crashes, zero fires, and zero injuries among the 20 fuel system complaints for the 2011 QX56.

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.