2021 Infiniti QX50 Engine Problems

Mileage when the problem started

• Under 25k
  00%
• 25k–50k
  114%
• 50k–75k
  114%
• 75k–100k
  343%
• 100k–150k
  114%
• 150k+
  114%

Owner reports

Selected complaints filed with NHTSA by 2021 Infiniti QX50 owners, lightly cleaned up (personal details are redacted by NHTSA).

The contact owns a 2021 Infiniti QX50. The contact stated that the vehicle was taken to a dealer for an oil change; however, the dealer informed the contact that the turbocharger needed to be replaced. The vehicle was repaired; however, while driving at an undisclosed speed, there was an abnormal sound coming from the engine compartment. No warning lights were illuminated. The vehicle was taken back to the dealer for an oil change, and the dealer informed the contact that the engine needed to be replaced. The dealer stated that there were metal flakes in the oil pan and that the flakes were believed to be caused by inconsistent oil changes. The vehicle was not repaired. The contact was notified that the VIN was included in NHTSA Campaign Number: 25V437000 (Engine and Engine Cooling); however, the dealer informed the contact that parts were not yet available for the recall repair. …

The contact owns a 2021 Infiniti QX50. The contact stated that while driving at an undisclosed speed, there was an abnormal sound coming from the engine compartment, prompting the contact to discontinue driving the vehicle. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the engine bearings, resulting in damages to the engine. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 25V437000 (Engine and Engine Cooling). The VIN was included, but the vehicle was not repaired. …

The contact owns a 2021 Infiniti QX50. The contact received notification of NHTSA Campaign Number: 25V437000 (ENGINE AND ENGINE COOLING); however, the part to do the recall repair was not yet available. The contact stated that while driving at 55 MPH, there was an abnormal sound coming from the engine. The check engine warning light was illuminated, and the vehicle jerked while driving and failed to accelerate as intended while depressing the accelerator pedal. The contact called the local dealer and explained the failure. The contact was informed that the vehicle could not be inspected if the failure was due to the recall. The vehicle was not diagnosed or repaired. The contact stated that the failure persisted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. …

The contact owns a 2021 Infiniti QX50. The contact stated that while driving at an undisclosed speed, there was an abnormal sound coming from under the hood. No warning light was illuminated. The vehicle was taken to a local dealer, where it was diagnosed and metal shavings were found in the oil pan. Upon further investigation, the contact associated the failure with NHTSA Campaign Number: 25V437000 (Engine and Engine Cooling); however, the repair was denied due to the criteria not being met, a lack of maintenance records, and sludge in the oil pan. The vehicle was previously taken to a local independent mechanic to be diagnosed and there was no sludge in the oil pan from a previous maintenance service. The contact was adamant that the VIN was previously associated with the recall, but was removed. The manufacturer was made aware of the failure. …

The contact owns a 2021 Infiniti QX50. The contact received notification of NHTSA Campaign Number: 25V437000 (Engine and Engine Cooling); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The vehicle was taken to the dealer, who referenced the Collision Avoidance System; however, did not diagnose the vehicle for any failure. The dealer confirmed that the recall repair was not yet available. The contact stated that while starting the vehicle, the check engine warning light illuminated. The vehicle was turned off and then restarted to deactivate the check engine warning light. The manufacturer was not made aware of the issue. The failure mileage was approximately 28,500.

The contact owns a 2021 Infiniti QX50. The contact stated that while attempting to start the vehicle, the vehicle failed to start and was inoperable. The check engine warning light was illuminated. The contact received notification of NHTSA Campaign Number: 25V437000 (Engine and Engine Cooling); however, the part to complete the recall repair was not yet available. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The contact was referred to Roadside Assistance to tow the vehicle to the dealer. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The approximate failure mileage was 59,000.

The contact owns a 2021 INFINITI QX50. The contact stated while operating the vehicle at an undisclosed speed, she stated she heard a loud sound coming from the motor, she pulled over and attempt to restarted the vehicle but it would not turn on. The vehicle was towed where it was diagnosed that the vehicle engine oil had metal shavings in the oil, the vehicle was brought in for regular maintenance and a recall repair. The vehicle engine was replaced under NHTSA Campaign Number: 25V437000 (ENGINE AND ENGINE COOLING) however, after the repair, the issue had reoccurred. The manufacturer was notified of the failure. The failure mileage was 95,193.

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 Fault - See Owner's Manual" message, and became unresponsive/difficult to control. The engine remained on, but the vehicle did not respond properly. The vehicle struck a fixed object/rock. A police report was filed/requested, and medical evaluation was sought afterward. The suspected failed or malfunctioning systems are the engine/powertrain response, electrical system, and related control systems. The vehicle should be available for inspection upon request and should be preserved before any diagnostic codes, freeze-frame data, event data, modules, or electronic records are cleared, reset, repaired, overwritten, or destroyed. …

1. The engine is the system that is malfunctioning. There was a recall on my vehicle. I was told to bring the vehicle in for the metal found in oil. Infiniti denied to replace my engine which was stated during the recall that the engine would be replaced. My vehicle was returned to me without receiving an engine per the recall. 2. My safety is at risk because the engine can fail which can cause me to lose controls of the vehicle and not be able to prevent an accident. That also places others at risk. My engine could also blow up at any given time. 3.The problem has been confirmed by the Infiniti dealership (service department) during both inspections. 4.The vehicle has been inspected by the manufacturer. Infiniti had denied to expect responsibility per the recall and denied to replace my engine per their recall. …

Component or System Failed: Engine failure. The vehicle is available for inspection at Sewell Infinity in Dallas, TX. Safety Risk: The engine failure The loss of acceleration created a serious safety risk. The vehicle was unable to accelerate properly in traffic, which could have caused an accident on the freeway. Fortunately, I was able to get back home and have the vehicle towed. Problem Reproduced/Confirmed: The dealership has confirmed the engine failure after their inspection. Inspection: The vehicle has been inspected by the dealership. Warning Lamps/Messages: There were no prior warning lamps or error messages before or after the engine failure. The failure occurred suddenly without warning. Additional Information: NHTSA shows my VIN [redacted] ) has an active, incomplete recall (Manufacturer Recall Number R25B2, NHTSA Recall Number 25V-437) related to engine failure. …

Related recalls

NHTSA investigations

Engine complaints in other QX50 years