2021 Infiniti QX50: sudden loss of power

Filed Jun 29, 2026 · Electrical, Engine · CT · crash · 3 injuries

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. Before this incident, repeated drivability and safety-related concerns were reported to Infiniti/dealer service departments, including vibration during acceleration, abnormal gas pedal vibration, lack of acceleration, poor power response, jerking/jolting, rough ride, abnormal noises, front-end noise, and safety/reliability concerns. Some concerns were documented in service records. Prior repairs included front passenger-side wheel bearing replacement and cooling fan/IPDM-related warranty work, but the drivability/power-response concerns continued. UNKNOWN whether the manufacturer completed a full post-incident inspection. The vehicle has been reviewed by police and insurance-related parties to the extent related to the collision. This complaint is being filed because the condition appears to involve a safety defect causing loss of power response and system fault warnings while driving. I am currently waiting on the police report, the report number has been provided.

Filed Feb 11, 2026 · Engine · CA

My 2021 Infiniti QX50 is subject to Recall 25V437000 for engine bearing defects that can cause engine failure, loss of power, and fire. During the recall inspection, Cerritos Infiniti found metal debris. They first diagnosed this debris as being in the engine oil and recommended immediate engine replacement. Days later, they reversed this diagnosis, claiming the debris was only on the removed oil pan from "technician scraping" and that the engine is safe. Infiniti Corporate reviewed the dealer's evidence, denied the warranty claim for an engine replacement, and refuses to provide me with any technical documentation—photographs, video, or analysis—that would verify which diagnosis is correct. They have refused my request for an independent inspection by a Field Technical Representative at a different dealership. The dealer has now threatened $60/day storage fees to coerce me into accepting the vehicle back without any verifiable proof of engine safety. I am being forced to choose between paying punitive fees or driving an unverified vehicle with known, documented risks of catastrophic failure and fire. I am filing this complaint not to seek an engine replacement, but to request that the federal safety agency investigate whether Cerritos Infiniti and Infiniti Corporate have violated federal safety recall requirements by: 1. Failing to provide owners with complete and accurate information about the results of recall inspections; 2. Destroying evidence (the original contaminated oil/filter) before an independent review could occur; 3. Coercing owners into accepting potentially unsafe vehicles through punitive storage fees; 4. Failing to perform the required recall remedy—which, if "specific debris" is found, requires engine replacement—and instead substituting an unverified, undocumented "second oil change" as an informal remedy.

Filed Jan 29, 2026 · Engine · FL

I proactively brought my Infiniti QX50 to the dealership for inspection due to the recall. The service department found metal in the engine, which they stated is related to a known recall issue. The service department told me that I need an engine replacement, but Infiniti has denied engine replacement despite this finding. According to the recall, metal inside the engine presents a risk of sudden engine failure, including loss of power while driving, which increases the risk of a crash. The recall exists to prevent this exact outcome, yet the manufacturer is refusing the recommended remedy. I am concerned about vehicle safety and believe this condition should qualify for engine replacement under the recall.

Filed Dec 13, 2025 · Electrical, Engine · GA

Around 530pm At the corner of Briarcliff Rd NE Atlanta Ga and N Druid Hills Rd NE Atlanta GA As I was about to accelerate after the Red Light turned green, my car experienced a significant loss of power. Several warning lights came on, the engine light came on and a warning that said System Default came on. I was almost rear ended but was able to put on my hazards and coast to the side of the road, where I turned the car off and back on. It continued to display the warning and system default message as well as loss of power. I was able to coast into the parking garage at work and park. I am a healthcare worker and my shift ends at midnight. I have a 30 minute drive home and I’m afraid my car may do the same thing-lose power- and that can be catastrophic on the interstate. This is not the first time this has happened. I took my car to Infiniti and they said the recall was cancelled for now. I have two small children that I have to transport in my car and it is unsafe. We need a solution asap!

Filed Oct 25, 2024 · Engine, Transmission · MA

Without any warning or indicator light on the dash, the vehicle lost power when pulling out of our driveway - we live on a main road and were very lucky not to be hit by upcoming traffic. The car went into limp mode and would not accelerate past 20mph. We have been fighting with Infiniti for the last three weeks as no one can find the problem and they finally said a new engine was needed. There is on 35,000 miles on this car and we had to fight to have this replacement covered under warranty. Now that parts are back ordered and we are not receiving any help. We are three weeks without a vehicle and have no loaner vehicle. No one at Infiniti can give a timeframe for the resolution of this issue, what caused this issue and we are now very fearful that this will happen again - even with an engine replacement. This was very scary for our family and we are amazed that there was no indicator light or warning. The car didn't make any noises and was running great and then all of a sudden it would not go. Very alarming to say the least!