2011 Infiniti QX56 Other or unknown Problems
- Complaints
- 8about this part
- Share
- 10%of 78 total for the year
- Median mileage
- 90,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the other or unknown of the 2011 Infiniti QX56, 10% of the 78 complaints for this model year. Where a mileage was given, the median is 90,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“In june 2017, I had the vehicle into the dealership for the power train recall. In july 2017 (87k miles), I had a 420 bank 1 cat code, and replaced one catalytic converter. In december 2017 (94k miles), the 'check engine soon' light illuminated again, and the 430 code shows the other catalytic converter (bank 2) needs to be replaced. It seems the cats on these vehicles are terrible, and once one goes out, the other fails too. This is very expensive...about $2,000 each in my case. This seems too common based on the reviews I've read online now. …”
NHTSA complaint #11053551, filed 2017-12, 90,000 miles“Through my research and speaking with Infiniti mechanics there has been a known issue with timing chains and associate parts that are a hazard and a major expense to 2011-2012 infinity QX56 owners. This issue will leave you stranded somewhere!! It happens to my wife and I three times!!! I had to get it towed all three times!! The hazard is while driving on highway the engine just loses all power leaving the hazard of someone running in back of you. If you driving up an incline and this problem comes about your vehicle will stall an you can possibly start rolling backwards. …”
NHTSA complaint #10819153, filed 2016-01, 74,000 miles“Infiniti has never officially issued a recall but should have since all 2011-2013 Infiniti QX56 have catalytic converter issues that need to be replaced. It is covered if you replace before 80k miles but if you do not know about it could cost you $6,000. It is an issue with all of them that Infiniti does not want to address but should recall and help customers since it is an error they made in these models which is now fixed in newer models.”
NHTSA complaint #11097242, filed 2018-05, 100,000 miles“Catalytic converter both sides not working (112 k miles). This is a very prevalent (and very expensive) issue in most 2011-2013 QX56 (please see NHTSA complaints and Infiniti forum complaints). Is there a recall or will there be one?”
NHTSA complaint #11118205, filed 2018-08, 112,000 miles“The service engine light came on and the vehicle was checked by Infiniti service. The right side catalytic converter failed. We repaired that (about 2 weeks ago). Today, the same service engine light came on and it is the left catalytic converter. The total amount spent to repair both of the catalytic converters will be over three thousand dollars. From speaking to the mechanic and researching online, it appears that the catalytic converters failing on this vehicle is a prevalent problem. This is a very expensive issue to fix and it seems like many people are experiencing this issue. …”
NHTSA complaint #11045225, filed 2017-11, 88,000 milesOther or unknown: other model years
Other parts of the 2011 Infiniti QX56
37 complaintsFuel system
20 complaintsSuspension
9 complaintsTransmission and drivetrain
4 complaintsElectrical system
3 complaintsEngine cooling
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsAir bags
2 complaintsBody and structure
2 complaintsVehicle speed control
2 complaintsEquipment
1 complaintsSteering
1 complaints
← All problems reported for the 2011 Infiniti QX56
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology