Problems · NHTSA complaints
2012 Infiniti QX56 problems
Owners filed 59 complaints about the 2012 Infiniti QX56 with NHTSA between Oct 2011 and Jun 2026. The most-cited component is engine (24).
Complaints
59
Filed with NHTSA
Crashes
1
Reported by owners
Fires
0
Reported by owners
Injuries
0
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Engine24
- Electrical system9
- Fuel/propulsion system7
- Air bags5
- Suspension4
- Engine and engine cooling4
- Structure4
- Power train4
- Service brakes3
- Seat belts1
- Service brakes, hydraulic1
- Vehicle speed control1
- Other / unknown7
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 8, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
1
2
2
0
5
6
2
8
12
10
4
4
1
0
0
2
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2011 | 1 |
| 2012 | 2 |
| 2013 | 2 |
| 2014 | 0 |
| 2015 | 5 |
| 2016 | 6 |
| 2017 | 2 |
| 2018 | 8 |
| 2019 | 12 |
| 2020 | 10 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 0 |
| 2025 | 0 |
| 2026 | 2 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Engine
24 reports
“The contact owns a 2012 Infiniti QX56. The contact stated while driving 30 MPH and depressing the accelerator pedal, the vehicle started shaking violently. The contact stated that the check engine warning light was illuminated. The contact took the vehicle to the local dealer, where it was diagnosed with needing the timing chain to be replaced. The vehicle was not repaired and continued to experience the failure. The manufacturer had been informed of the failure. The failure mileage was approximately 87,000.”
Electrical system
9 reports
“TL* THE CONTACT OWNS A 2012 INFINITI QX56. THE CONTACT STATED THAT THE BATTERY FAILED PREMATURELY. THE VEHICLE WAS TAKEN TO AN UNKNOWN DEALER, AND AN INDEPENDENT MECHANIC, TO HAVE A DIAGNOSTIC PERFORMED. THE DIAGNOSTIC TEST WAS UNABLE TO LOCATE A FAILURE CODE THEREFORE, THE BATTERY WAS REPLACED SEVERAL TIMES. THE VEHICLE WAS TAKEN BACK TO THE UNKNOWN DEALER AND THE CONTACT WAS INFORMED THAT THE BATTERY FAILURE COULD BE CAUSED BY PARASITIC DRAIN OR A RELAY FAILURE. THE FAILURE RECURRED SEVERAL TIMES. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 83,000.*DT*JB”
Fuel/propulsion system
7 reports
“HAD NO PRIOR ISSUES, DRIVING DOWN THE HWYAT 65 MILES PER HR.. CAR FAILED. COSTED TO SIDE OF ROAD MADE IT TO REPAIR SHOP AND THE FUEL PUMP WENT OUT, WHICH AFFECTED THE TIMMING CHAIN AND BROKE THE TEETH, WHICH HAS AFFECTED THE MOTOR. THIS IS A DESIGN DEFECT THAT HUNDRED OTHER FOLKS ARE HAVING. I COULD HAVE LOST MY LIFE WITH THIS VEHICLE”
Air bags
5 reports1 crash1 related recall
“MY AIR BAG LIGHT WAS ON. I TOOK MY VEHICLE TO THE DEALERSHIP TO FIND OUT WHAT WAS THE PROBLEM. THE ISSUE THAT THEY REPORTED TO ME WAS "PAST CODE FOR AIR BAG PASSENGER SIDE: WILL NEED TO REPLACE DIAGNOSTICS MODULE TO BEGIN DIAGNOSIS."”
Suspension
4 reports
“While driving my vehicle with my family, I experienced a sudden and dangerous loss of control. I was able to safely maneuver the vehicle off the roadway without injury. After inspection, it was determined that the subframe had fractured due to severe rust, which was not previously identified. The failure occurred without warning and directly impacted the ability to control the vehicle, creating a significant safety hazard. No warnings or messages indicated a problem existed prior to the failure.”
Engine and engine cooling
4 reports
“The contact owns a 2012 Infiniti QX56. The contact stated that while driving at 56 MPH, the vehicle slowed down and failed to respond as intended. An oil change was performed; however, the failure persisted. The contact stated that the high-pressure fuel pump was leaking, causing the timing chain to fail. The check engine warning light illuminated, and the failure progressed, causing the vehicle to stall. The vehicle was not diagnosed or repaired by a dealer or independent mechanic. The vehicle failed on the side of the road and was towed to the residence. The contact used an OBD scanner and retrieved DTC: P0021, P0011, and P0300. The manufacturer was contacted about the failure, and Customer Service Program Number: P6305. The VIN was provided, and the contact was informed that the vehicle was not covered under the campaign and that the campaign had expired. The failure mileage was approximately 175,000.”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 8, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.