Infiniti Qx50 Engine Problems
157 owner complaints filed with NHTSA across 11 model years.
Complaints by Year
Worst year: 2019. Best year: 2025.
Owner Reports
A representative sample of complaints filed with NHTSA.
While driving my 2019 Infiniti QX50, the engine suddenly lost significant power and entered failsafe (limp) mode due to a diagnosed VCR actuator fault (diagnostic codes P11A8-00 and P11AC-00). The sudden power loss caused a single-vehicl...
On June 16, 2026, a 2021 Infiniti QX50 experienced a safety-related malfunction while being driven at approximately 15–20 mph. The vehicle suddenly jerked, lost power response, displayed multiple warning lights, showed a “System Faul...
The contact owns a 2019 Infiniti QX50. While the contact's son was driving at an undisclosed speed, the engine seized with several unknown warning lights illuminated. The contact stated there was smoke and fire coming from the engine com...
so after my initial report about my engine catching fire on the highway, I received an invoice for $5,000 for a used engine with 80k miles on it; plus another $2800 for the service fee. I already put down about $3900 for the engine repai...
The engine blew up on the expressway. And this has happened for many other qx50 drivers.
There are 2 check engine codes that came up as an issue for my vehicle, out of the blue: P0720 and P0500. I reached out to my mechanic and he couldn't fix it. So my plan was to take it to the dealership at the end of this month; however,...
WHILE DRIVING, THE VEHICLE WILL DECLINE IN ACCELERATION AND YOU CAN NOT INCREASE ACCELERATION. WHEN TURNING THE VEHICLE OFF, THE CAR WILL PROCEED AT A SLOW PACE. INFINITI DEALER TOLD ME THAT I NEEDED TO LET THE CAR WARM UP FOR 30 MINUTES...
TL* THE CONTACT OWNS A 2014 INFINITI QX50. THE CONTACT PURCHASED THE VEHICLE FROM INFINITI OF ORLAND PARK (8751 W 159TH ST, ORLAND PARK, IL 60462), BUT WAS INFORMED THAT SHE COULD NOT TAKE OWNERSHIP BECAUSE IT NEEDED UNKNOWN RECALL REPAI...
While driving on the highway the vehicle would not accelerate and the oil pressure light came on. After pulling over we noticed a slight burning smell and cut the engine. After a few minutes we tried to start the car again and it would n...
We received the federal recall information and took the vehicle to the nearest Infiniti dealer (96 miles away) on 9/2/26. Diagnostics were performed and were told that the car "passed" the inspection. Two days later, the engine demonst...
#11753348 - on 7/1/2026, Infiniti Dealer found metal shavings actively present in my oil pan during a recall inspection. They passed the vehicle as good condition stating nothing found per a vehicle inspection report given to me. On Ju...
Engine lost all power and car seemed to be locked in low gear while attempting to drive down the road. Took the car to Infiniti dealership which said there was a recall and they inspected the vehicle. Mechanic inspected the vehicle and s...