Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2020 Infiniti QX50 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2020 Infiniti QX50. The contact stated that while driving 75 MPH, the check engine warning light illuminated, and the RPM became elevated. The vehicle was taken to the dealer, where an unknown recall repair was performed. The contact stated that the engine was replaced. The vehicle was repaired, but the failure reoccurred. The vehicle was taken back to the dealer where the contact was informed that the failure was associated with the computer system which was not recalibrated after the engine replacement. The vehicle was repaired, but the failure reoccurred. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated and the message "Critical Warning - CVT Hot - Power Reduced" was displayed. In addition, the RPM became elevated, and there was an abnormal odor inside the vehicle. …
The contact owns a 2020 Infiniti QX50. The contact stated that the vehicle was repaired under NHTSA Campaign: 25V437000 (Engine and Engine Cooling) however, other failures occurred. The contact stated that after the vehicle was dropped off by the local dealer, the front passenger's side tire deflated. The vehicle was taken to a local dealer, where it was repaired. The contact stated that the underbody shield of the engine guard had detached, allowing road debris to enter the hood. In addition, the contact stated that while attempting to start the vehicle, the vehicle failed to start as intended, with a rattling sound coming from the engine. The vehicle was towed to a local dealer, where the vehicle was lost and misplaced. The manufacturer was made aware of the failure. The failure mileage was approximately 51,000.
I experienced loss of power while on the interstate and at that time I was unaware of what the issue was until I received a Recall regarding the engine. I often have my grandson [redacted]) who sits in the back seat of my 2020 QX/50. I went into the Infiniti of South of Atlanta, Union City, Georgia 30291 and I was informed by my Service Representative (Mrs. Dyamond Cobb) on September 12, 2025 @ 11:00 a.m. that this Recall has been suspended. I was given info to reach out to Infiniti Consumer Affairs Department and also to submit through on line a complaint to www.safercar.gov and I am submitting this info on line as a means to document that I am having serious concerns. I am making payments on a vehicle that could cost me and my family our life! In addition, the dealership is definitely NOT ACTING ON BEHALF OF THE CUSTOMER WHATSOEVER! …
My vehicle is affected by Recall 25V437. I am already experiencing recall-related symptoms, including stuttering, unusual engine noises, and uneven acceleration. I leased the vehicle through DFW Auto and Services INC, On August 15, 2025, at 9:35 AM, I spoke with Sam in the finance department of DFW Auto and Services INC during a 3 minute call from [phone]. I specifically asked about the recall affecting this vehicle. Sam stated that the recall had been "taken care of." This was false, as Recall 25V437 remains open and unresolved. The dealership misrepresented the recall status of my vehicle, failed to disclose that Recall 25V437 remained open, and delivered a defective product - a vehicle with a known safety defect that directly impacts usability, value, and consumer safety. On November 18, 2025, I submitted a formal complaint to the Attorney General regarding this matter. …
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 demonstrated complete failure. We had to have the vehicle towed to a Nissan dealer in our town (no Infiniti here) on 9/11/26. According to this report, " Based on the testing and findings, this no start condition relates engine mechanical issue, possible low compression from cylinders. Recent service history shows engine bearing inspection has been performed, and and engine ass'y has Infinity extended warranty". Due to the warnings of "catastrophic engine failure" per the federal recall, we believe this is a significant safety issue. We have learned of many pending cases of "inadequate diagnostics" and engine failure afterward. …
VEHICLE : IMNFINITI QX50 YEAR: 2020 LOCATION : PUERTO RICO My Infiniti QX50 has an active engine recall by VIN In 2023 the Infiniti dealer in San Juan PR documented oil sludge in the engine and performed and engine flush and internal treatment . The vehicle was returned to service and was not declare unsafe In 2024 , the same Infiniti dealer performed maintenance and again returned the vehicle to service without restriction The vehicle has now develop internal engine damage . The dealer is denying recall coverage , stating the damage is due to oil sludge and alleged lack of maintenance . The denial is inconsistent with service history , as the sludge was documented and treated while the vehicle was under dealer maintenance , and dealer performed maintenance continued after that finding. …
I own a 2020 Infiniti QX50 that is included in NHTSA Recall 25V-437 for defective engine bearings that may cause sudden engine failure. My VIN has been confirmed by the dealer as part of the active recall. I have already noticed intermittent shaking at idle and a grinding sensation during acceleration, which are early warning signs listed for this defect. I am worried these symptoms indicate my engine may be starting to fail. My Infiniti dealer told me they "see the recall as active," but that it is on hold and they cannot inspect or repair my vehicle at this time. They also stated they cannot provide me with a loaner or rental vehicle in the meantime. I believe this puts me, my family, and others on the road at risk because engine failure could occur suddenly while driving, leading to a crash. …
The contact owns a 2020 Infiniti QX50. The contact stated that while driving at undisclosed speeds, the vehicle failed to accelerate as intended and lost motive power. There were no warning lights illuminated. No further information was available. The contact received notification of NHTSA Campaign Number: 25V437000 (Engine and Engine Cooling). The vehicle was taken to an unknown local dealer, where it was determined that the timing belt needed to be replaced. The dealer informed the contact that the recall repair was not available. The contact stated that there was an unresolved dispute with the dealer. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was unknown.
Pulled out into an intersection with limited visibility. Once I got into my lane I observed a car behind me that I had not seen. I tried to accelerate to avoid being hit. My car began making a knocking sound with loss of power. The other car went around me on the shoulder to avoid a collision. Infiniti of Birmingham (Alabama) says that one of the bearings in the engine spun and there is metal shavings in the oil pan. They say I need a new engine with only 68,000 miles. They are "unsure" if Infiniti will warranty the cost of repairs. Absolutely ridiculous! Please help!
The vehicle's engine light turned on. The engine light remains on, and frequently the Malfunction and System fault See Owners Manual will display. When the malfunction message appears all the traction lights are also turned on. The RPM's in the vehicle are very accelerated, and it's difficult to drive the vehicle. The vehicle will also produce a very heavy smog smell. I took the vehicle into the retailer several times and nothing was done. The manufacturer is also not taking responsibility and stated the issue is unrelated to the engine bearing recall.
Related recalls
Engine and engine cooling › Engine › Hard parts internal/mechanical
Nissan North America, Inc. (Nissan) is recalling certain 2021-2024 Rogue, 2019-2020 Altima, 2019-2022 Infiniti QX50, and 2022 Infiniti QX55 vehicles equipped with 3-cylinder 1.5L or 4-cylinder 2.0L variable compression turbo (VC-Turbo) engines. The engine bearings may have manufacturing defects that can lead to engine failure.
Remedy: Dealers will reprogram the engine control module (ECM) software, free of charge. Owner letters were mailed April 8, 2026. Owners may contact Nissan's customer service at 800-647-7261 or Infiniti's customer service at…
NHTSA investigations
Complete loss of motive power due to engine failure
On December 13, 2023, the Office of Defects Investigation (ODI) opened PE23-023 to investigate allegations of engine failures leading to loss of motive power in model year (MY) 2021-2023 Nissan Rogue; MY 2019-2021 Nissan Altima; and MY 2019-2021 Infiniti QX50 vehicles.
Engine complaints in other QX50 years
Frequently asked questions
How common are engine problems on the 2020 Infiniti QX50?
NHTSA has 22 complaints about the engine & cooling of the 2020 Infiniti QX50, 67% of the model year's 33 complaints.
Is there a recall for 2020 Infiniti QX50 engine problems?
Yes — NHTSA recall 25V-437 (hard parts internal/mechanical, Jun 27, 2025). Recall repairs are free at authorized dealers.
At what mileage do 2020 Infiniti QX50 engine problems start?
Half of the complaints with a recorded mileage happened before about 51,000 miles, and 33% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.