2011 INFINITI QX56 Engine Problems

Need to know if there are recalls on the Q56 Infinite for the Catalytic Converter Failure. This truck had 2 and this is the second one that seems to be faulty and the truck only had 162000 miles The 1st one faulted at 151000 2024 The Infinite 2011 Q56 has been known for faulty Catalytic Converter Failure and nothing was done to recall and fix. The truck had 2 Catalytic Converters, the 1st one went out in 2024 @ 152000 miles, now it looks like my engine light is back on with error code P0420 Converter malfunction. I searched internet and it was noted that 2011 have had enormous reports about this issue. This doesn’t make since there is no recall when it is noted that the 2011 Q56 had history of faulty Catalytic Converter Failure. This cost to replace and repair is enormous and this type of part replacement repair should not be happening at 152000-162000 miles. This needs to be investigated and recall issued immediately.

NHTSA ID

11751672

Incident

Jul 18, 2026

Unknown. Timing chain issue. When car is started it makes a noise for about 10 min then goes away

NHTSA ID

11528708

Incident

Jun 21, 2023

Catalytic Converter, A/F Sensor failed on the interstate when I was driving with kids in the car. Took vehicle to the nearest dealer only to be told that this is a known problem with these vehicles and it was going to cost me $3,100 to repair.

NHTSA ID

11525041

Incident

Jun 2, 2023

I'M CURRENTLY DEALING WITH THE TIMING CHAIN NIGHTMARE SO MANY OTHERS HAVE HAD AND ARE HAVING. OF COURSE JUST AS MOST OF THE OTHERS I'M OUT OF WARRANTY AND REALLY FRUSTRATED THAT INFINITI HASN'T STEPPED UP TO THE PLATE TO ADDRESS THE PROBLEM PROPERLY AS OPPOSED TO RENAMING THE QX56 TO QX 80 TO SAVE THEMSELVES, LEAVING CONSUMERS SCRAMBLING WITH EXPENSIVE TIME CONSUMING FIXES TO A KNOWN DEFECT ON THEIR PART. WHERE'S THE ACCOUNTABILITY ON THEIR PART, DO A CERTAIN NUMBER OF PEOPLE HAVE TO DIE OR BE INJURED BEFORE THE CONSUMERS ARE PROVIDED WITH THE PROPER ASSISTANCE? WHO REALLY LOOKS OUT FOR US? A recall was done in 2016 obviously they need to expand the Vin number

NHTSA ID

11456405

Incident

Feb 1, 2022

The contact owns a 2011 Infiniti QX56. The contact stated while driving at various speeds, the vehicle would vibrate violently. Additionally, the vehicle had experienced intermittent power loss and had gone into limp mode. The contact stated that the check engine warning light was illuminated. The vehicle was taken to a local mechanic where it was diagnosed with needing the timing chain replaced. The vehicle was not repaired. The manufacturer was informed of the failure and informed the contact that the VIN was not included in a recall. The failure mileage was approximately 140,000.

NHTSA ID

11447848

Incident

Oct 1, 2021

Mileage

140,000 mi

CODE REF TSBNO. 16-015 TIMING CHAINS REPLACEMENT MANUFACTURER DEFECT AND RECALL

NHTSA ID

11415503

Incident

Jan 13, 2021

Mileage

161,798 mi

TL* THE CONTACT OWNS A 2011 INFINITI QX56. THE CONTACT STATED WHILE DRIVING 65 MPH, THE CHECK ENGINE WARNING LIGHT ILLUMINATED. THE CONTACT CONTINUED DRIVING TO HIS DESTINATION. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER SOUTHWEST INFINITI (10495 SOUTHWEST FWY, HOUSTON, TX 77074, (832) 742-1614) WHERE IT WAS DIAGNOSED WITH NEEDING THE CATALYTIC CONVERTER TO BE REPLACED. THE VEHICLE WAS REPAIRED HOWEVER, 3 YEARS LATER HE EXPERIENCED THE FAILURE. THE VEHICLE WAS TAKEN BACK TO DEALER, WHERE IT WAS DIAGNOSED WITH NEEDING THE CATALYTIC CONVERTER TO BE REPLACED FOR A SECOND TIME. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 67,000.

NHTSA ID

11388357

Incident

Jan 1, 2017

Mileage

67,000 mi

TL* THE CONTACT OWNS A 2011 INFINITI QX56. THE CONTACT STATED WHILE DRIVING 40 MPH, THE ACCELERATOR PEDAL WAS DEPRESSED HOWEVER, THE VEHICLE FAILED TO RESPOND AND DECELERATED WITHOUT WARNING. THE VEHICLE WAS COASTED TO THE SHOULDER OF THE ROADWAY AND TURNED OFF AND RESTARTED HOWEVER, THE FAILURE PERSISTED. THE VEHICLE WAS TOWED TO THE RESIDENCE. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. A DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 82,000.

NHTSA ID

11372909

Incident

Oct 31, 2020

Mileage

82,000 mi

CATALYTIC CONVERTER FAILURE ON DRIVER'S SIDE RESULTING IN CHECK ENGINE LIGHT.

NHTSA ID

11361434

Incident

Nov 22, 2019

Mileage

69,577 mi

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. THE BOTTOM LINE IS THAT EVERY SINGLE THING THAT I RESEARCHED AND FIND THE WRONG OF THE VEHICLE COMES BACK WITH A VOLUNTARY RECALL. LIKE THE FUEL SYSTEM, TIMING CHAIN, VVT SOLENOIDS, HIGH PRESSURE FUEL PUMP. I USE VEHICLE IN THE CITY AND HIGHWAY.

NHTSA ID

11353447

Incident

Jun 1, 2020

Mileage

121,089 mi

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 ID

11318253

Incident

Feb 1, 2020

Mileage

100,000 mi

TL* THE CONTACT OWNS A 2011 INFINITI QX56. THE CONTACT STATED THAT WHILE DRIVING ON AN INCLINE APPROXIMATELY 50 MPH, THE VEHICLE LOSS MOTIVE POWER WITH AN ABNORMAL SOUND COMING FROM THE ENGINE COMPARTMENT. THE VEHICLE WAS TOWED TO THE DEALER INFINITI OF GWINNETT, (3090 SATELLITE BLVD, DULUTH, GA 30096), TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE TIMING CHAIN NEEDED TO BE REPLACED. THE CONTACT ALSO STATED THAT THE VEHICLE WAS PREVIOUSLY REPAIRED IN 2016, BY HAYES CHRYSLER/DODGE OF LAWRENCEVILLE LOCATED AT (719 DULUTH HWY, LAWRENCEVILLE, GA 30046), FOR A SIMILAR FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 169,000.

NHTSA ID

11317204

Incident

Jan 22, 2020

Mileage

169,000 mi

TL* THE CONTACT OWNS A 2011 INFINITI QX56. THE CONTACT STATED THAT THE CHECK ENGINE WARNING LIGHT ILLUMINATED UPON START-UP. THE VEHICLE WAS TAKEN TO TWO SEPARATE INDEPENDENT MECHANICS TO BE DIAGNOSED. THE CONTACT WAS INFORMED OF DIAGNOSTIC TROUBLE CODES: P0420- P0430 CATALYST SYSTEM INEFFICIENCY. THE VEHICLE WAS NOT REPAIRED. A LOCAL DEALER WAS NOT CONTACTED HOWEVER, THE MANUFACTURER WAS MADE AWARE OF THE FAILURE, CASE NUMBER: 35634299. THE APPROXIMATE FAILURE MILEAGE WAS 78,000.

NHTSA ID

11297314

Incident

May 1, 2019

Mileage

78,000 mi

TL* THE CONTACT OWNS A 2011 INFINITI QX56. WHILE DRIVING 60 TO 65 MPH, THE VEHICLE JERKED AND AN ABNORMAL NOISE WAS HEARD FROM THE ENGINE AREA. ALSO, THE SERVICE ENGINE INDICATOR ILLUMINATED. THE CONTACT HAD TO DECELERATE DUE TO THE NOISE. THE CONTACT DROVE THE VEHICLE TO AN INDEPENDENT MECHANIC TO BE DIAGNOSED, BUT NO FAILURE CODE WAS FOUND INITIALLY. THE MECHANIC RESET THE CODES, TEST DROVE THE VEHICLE, PERFORMED A SECOND DIAGNOSTIC TEST, AND LOCATED FAILURE CODES FOR THE TIMING CHAIN, CATALYTIC CONVERTER, AND EXHAUST SYSTEM. THE MANUFACTURER INFORMED THE CONTACT THAT THE VEHICLE WAS NOT INCLUDED IN THE UNKNOWN MANUFACTURER RECALL FOR THE ENGINE TIMING CHAIN AND CATALYTIC FAILURE. THE VEHICLE WAS NOT TAKEN TO A DEALER. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 200,500.

NHTSA ID

11276857

Incident

Oct 16, 2019

Mileage

200,500 mi

THE CATALYTIC CONVERTER BANK 1 NEEDS TO BE REPLACED. THIS SEEMS TO BE A COMMON ISSUE WITH TURN 2011-2013 INFINITY QX 56 AND INFINITY SHOULD HAVE ISSUED A RECALL FOR THE FAULTY CONVERTERS.

NHTSA ID

11241886

Incident

Aug 2, 2019

Mileage

102,074 mi

TIMING BELT AND CATALYTIC CONVERTER FAILURE CONFIRMED MY INFINITI OF MARIETTA

NHTSA ID

11203798

Incident

Mar 1, 2019

Mileage

213,000 mi

TL* THE CONTACT OWNS A 2011 INFINITI QX56. THE CONTACT HEARD AN ABNORMAL NOISE COMING FROM THE VEHICLE. THE VEHICLE WAS TAKEN TO PEARSON INFINITI (11701 MIDLOTHIAN TURNPIKE, MIDLOTHIAN, VA 23113, 1-(804) 527-0300) WHERE IT WAS DIAGNOSED THAT THE TIMING CHAIN NEEDED TO BE REPLACED. THE CONTACT WAS INFORMED THAT THE DEALER WOULD CHECK TSB NUMBER: 16-015 AND VOLUNTARY SERVICE CAMPAIGN: P6305 TO DETERMINE THE GUIDELINES TO REPAIR THE VEHICLE. THE VEHICLE WAS AT THE DEALER WAITING TO BE SERVICED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS NOT AVAILABLE.

NHTSA ID

11152776

Incident

Sep 1, 2018

TL* THE CONTACT OWNS A 2011 INFINITI QX56. WHEN THE VEHICLE WAS STARTED, AN UNUSUAL NOISE WAS HEARD FROM THE ENGINE AND THE CHECK ENGINE INDICATOR ILLUMINATED. THE VEHICLE WAS TAKEN TO NALLEY INFINITI MARIETTA (404-994-4328, LOCATED AT 2020 COBB PKWY SE, MARIETTA, GA 30060) WHERE IT WAS DIAGNOSED THAT THE TIMING BELT NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE WAS NOT REPAIRED. THE VIN WAS NOT PROVIDED. THE FAILURE MILEAGE WAS APPROXIMATELY 120,000.

NHTSA ID

11151748

Incident

Nov 8, 2018

Mileage

120,000 mi

TL* THE CONTACT OWNS A 2011 INFINITI QX56. WHILE OPERATING THE VEHICLE, A RATTLING NOISE WAS PRESENT COMING FROM THE ENGINE COMPARTMENT. THE RATTLING NOISE BECAME MORE PREVALENT AFTER STARTING THE ENGINE. THE VEHICLE WAS EXAMINED BY AN INDEPENDENT MECHANIC WHO INDICATED THAT THE TIMING BELT WAS FAULTY. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED, BUT NO ASSISTANCE WAS OFFERED. THE LOCAL DEALER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 90,000.

NHTSA ID

11149471

Incident

Oct 1, 2017

Mileage

90,000 mi

TL* THE CONTACT OWNS A 2011 INFINITI QX56. THE CONTACT HEARD AN ABNORMAL NOISE WHEN THE VEHICLE WAS BEING FUELED AND THE CHECK ENGINE WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS NOT TAKEN TO A DEALER OR AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 126,557.

NHTSA ID

11142892

Incident

Oct 17, 2018

Mileage

126,557 mi

"TAKATA RECALL" ONLY OWNER OF 2011 QX56, ALWAYS ON TIME WITH PROPER MAINTANCE. AFTER A RECALL ON THE TIMING CHAIN 2 DAYS AFTER PICKING UP VEHICLE THE SERVICE ENGINE LIGHT CAME ON, I CALLED THE DEALER THEY ADVISED IT WAS NORMAL TO GIVE IT A FEW DAYS. AFTER 3 DAYS LIGHT SES LIGHT CAME OFF, THEN ABOUT 8 MONTHS LATER THE SERVICE ENGINE SOON LIGHT WAS BACK, GOT IT CHECKED AND IT'S THE CATALYTIC CONVERTER.

NHTSA ID

11140523

Incident

Oct 6, 2018

Mileage

106,000 mi

TIMING CHAIN FAILURE AND ALSO CATALYTIC CONVERTERS FAILED.

NHTSA ID

11123584

Incident

Aug 24, 2018

Mileage

97,000 mi

TL* THE CONTACT OWNS A 2011 INFINITI QX56. WHILE OPERATING THE VEHICLE AND DEPRESSING THE ACCELERATOR PEDAL, A SQUEALING AND CLAPPING TYPE NOISE WAS HEARD FROM THE ENGINE COMPARTMENT. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER (COULTER INFINITI, 6225 EAST TEST DR., MESA, AZ 85206) WHERE IT WAS DIAGNOSED THAT THE TIMING CHAIN WAS FAULTY. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VIN WAS NOT AVAILABLE. THE FAILURE MILEAGE WAS 78,000.

NHTSA ID

11120586

Incident

Aug 10, 2018

Mileage

78,000 mi

MY VEHICLE NEEDS TWO CATALYTIC CONVERTERS REPLACED IN ORDER TO PASS SMOG. INFINITI DEALER WANTS $5600 TO MAKE THIS REPAIR! THIS IS A COMMON PROBLEM FOR THIS VEHICLE AND SHOULD BE A RECALL ITEM.

NHTSA ID

11110803

Incident

Jan 2, 2018

Mileage

110,000 mi

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". HAD I KNOWN ABOUT THIS APPARENTLY COMMON PROBLEM, I WOULD NOT HAVE PAID FOR THE FIRST ONE WITHOUT CONTACTING THEM FIRST. IT APPEARS TO BE A KNOWN ISSUE IF THEY WERE WILLING TO GIVE ME ANY ASSISTANCE AT ALL, AND I WOULD THINK THAT WOULD BE EXTENDED TO REPAIRS ALREADY PAID FOR BY THE CONSUMER.

NHTSA ID

11098381

Incident

Mar 21, 2018

Mileage

100,000 mi