2011 Infiniti QX56 Engine Problems
- Complaints
- 37about this part
- Share
- 47%of 78 total for the year
- Median mileage
- 100,000miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 37 complaints about the engine of the 2011 Infiniti QX56, 47% of the 78 complaints for this model year. Where a mileage was given, the median is 100,000 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Today, I was told that I have to replace the catalytic converter, which going to cost me $2,000. I am the original car owner. I researched other sites and it appears there catalytic converter issues on Infiniti 2011 - 2013 QX56 vehicles. Please look into these websites. There should be some type of recall for these vehicles regarding the catalytic converter. …”
NHTSA complaint #11091678, filed 2018-05, 100,000 miles“Engine is making loud whining noise and jerks. Noise is heard when the truck starts and is on iddle. There was a service bulletin issued in 2016 itb16-015. We were never notified of this campaign. When calling infinity corporate they denied fixing the issue because they could not see the maintenance record for the truck since it was not taken to an infinity dealer. The truck gets maintenance from other places like jiffy lube etc. Our claim was denied they said the campagin expired in february 2018.”
NHTSA complaint #11318253, filed 2020-03, 100,000 miles“We purchased this vehicle used on may 5, 2017. My wife was driving it down a city street at less than 45mph, and it broke down on us on may 23rd, and was sent in for repairs. Told it was a relay or an issue with the timing. Got the vehicle back on june 1, and here it is june 7th and at the same location as before, at the same speed, it broke down with the same issue. We've owned the vehicle for one month and been in the shop twice. Please help as this has the potential to be a very costly repair.”
NHTSA complaint #10993875, filed 2017-06, 135,000 miles“On june 1st 2020 I took my 2011 Infiniti QX56 to the shop for having the code p0087. The shop told me that I should take it to the dealership because the problems the vehicle is having are recalled under voluntary safety recall campaign. When I called my local Infiniti dealership they told me my VIN # doesn't doesn't show as recalled. They dealership provided me with the phone number of Infiniti consumer affairs. I called Infiniti affairs and told them about my vehicle they told me that they were sorry but my VIN doesn't show up on their system. …”
NHTSA complaint #11353447, filed 2020-09, 121,089 miles“The service engine soon light came on, and I brought the vehicle to holmon Infiniti in mapleshade, nj where I purchased the vehicle. The diagnosis was a bank 2 catalytic convertor failure. I had it replaced at a cost of $2,661.79 on thursday march 29, 2018. On saturday march 31, 2018, the bank 1 catalytic convertor failed. Infiniti consumer affairs provided some assistance with the second repair. They paid for the parts and I paid the labor of $1,385.63. Infiniti consumer affairs would not reimburse me for the parts for the first repair because I already paid for it . …”
NHTSA complaint #11098381, filed 2018-05, 100,000 milesRelated service bulletins
- 10152503Nov 28, 2018OBD II EVAP Tube Warranty Enhancement The update below was sent out to Regions and Retailers in August of this year. We are re-circulating this update to make regional and…
- 10136202Mar 26, 2018INTELLIGENT KEY NOT DETECTED / ENGINE WILL NOT START This bulletin has been amended to update the Applied Vehicles. No other changes were made. Please discard previous versions…
- 10119255Nov 29, 2016INTELLIGENT KEY NOT DETECTED / ENGINE WILL NOT START This bulletin has been amended to update the Applied Vehicles and make changes to the body of the bulletin. Please discard…
- 10091401Jul 15, 2016"voluntary service campaign 2011 2013 qx56 and m56; timing chain this bulletin has been amended. The claims information section has been revised. No other changes have been…
- 10091079Jul 12, 2016"timing chain voluntary service campaign the announcement from may 6, 2016 has been revised to reflect increased flat rate times and includes additional questions & answers in…
- 10192828May 24, 2016Infiniti is conducting a Voluntary Service Campaign on certain 2011-2013 QX56 and 2011-2013 M56 vehicles to replace the ?Timing Chain?.
- 10192479Nov 25, 2014SERVICE INFORMATION Starting with 2010 Model Year, Infiniti vehicles have been gradually incorporating a new type of DTC known as Permanent DTC or P-DTC. If a vehicle is equipped…
- 10192427Aug 21, 2014IF YOU CONFRIM An oil leak at the right side block ball plug behind the alternator. ACTION: Use a punch to seat the block ball plug in the hole (refer to the Service Procedure)…
- 10192294Jan 13, 2014SERVICE INFORMATION Replacement Engine Control Modules (ECMs) for many newer Infiniti vehicles are now "Blank" ECMs. Blank ECMs come without software and must be programmed (not…
- 10051787Sep 4, 2013Infiniti: whine noise from engine area. If the noise does not increase with engine speed, the timing chain system may not be the cause. *js updated 10/29/2013
Engine: other model years
Other parts of the 2011 Infiniti QX56
20 complaintsSuspension
9 complaintsOther or unknown
8 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 29, 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