Infiniti QX50 knocking problems

Filed Oct 13, 2026 · Engine, Transmission · GA

On October 11, 2026, while driving my 2019 Infiniti QX50, I experienced a sudden loss of engine power. The check-engine light began flashing, the engine started shaking and making a knocking noise, and the vehicle would not accelerate beyond approximately 20 mph despite pressing the accelerator. This unexpected loss of power created a serious safety concern because I could no longer maintain normal driving speeds. In February 2026, at approximately 170,450 miles, my vehicle underwent an inspection at Infiniti of South Atlanta under the federal safety agency safety recall 25V437, involving defective engine bearings. The dealership informed me that the vehicle passed because insufficient metal debris was found in the oil pan to qualify for engine replacement. Approximately eight months later, on October 12, 2026, the same dealership inspected my vehicle at 197,467 miles. The technician's notes documented failed connecting rod bearings and an injector failure. The dealership recommended replacing the engine long block, turbocharger, and associated components. The vehicle remains at the dealership, unrepaired and available for further inspection by arrangement. I am concerned that the engine experienced a bearing failure after previously passing an inspection under a safety recall involving defective engine bearings. The relationship between this failure and the recall has not yet been determined. I request that the federal safety agency review this incident and investigate whether the failure may be related to recall 25V437 or the effectiveness of the completed recall remedy.

Filed Mar 31, 2026 · Engine · 139,602 miles · CA

I am filing a safety complaint regarding my 2019 Infiniti QX50 experiencing engine failure consistent with known bearing defects. On February 13, 2026, while driving from [XXX] to [XXX] on the highway, my vehicle began shaking severely, producing a rattling/knocking noise from the engine, and losing power while in motion. This created a dangerous driving condition and required the vehicle to be towed. The vehicle was taken to a repair shop in [XXX] , where it was diagnosed with engine bearing failure. The shop indicated that this issue was consistent with a known defect and that there was an active recall related to engine bearings at that time. Based on that information, the vehicle was towed to Bob Moore Infiniti in [XXX] for recall inspection and repair. Initially, the dealership indicated that there was an issue and that it was associated with a recall. However, they later reversed their position and stated that the vehicle was “fine” and did not perform any recall repair, despite the ongoing symptoms and prior diagnosis. The vehicle continues to exhibit the same dangerous symptoms, including shaking, engine knocking, and loss of power, and remains diagnosed by another repair facility as having engine bearing failure. This is a serious safety concern because the vehicle can lose power unexpectedly while driving at highway speeds. Additionally, there appears to be inconsistency in how this known defect is being handled, as my vehicle was initially identified as affected but later denied repair. I am requesting further investigation into engine bearing failures in the Infiniti QX50, as well as inconsistent recall application for this defect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 1, 2026 · Engine · HI

Hearing knocking from the engine and Infiniti of Honolulu has refused to schedule an inspection for over 6 months

Filed Jan 19, 2026 · Engine · GA

I took my vehicle into Roswell Infiniti to repair/replace the engine bearings as instructed on the recall notice and as it has been making noises and I have experienced rough driving. The workers did not repair or replace the bearings. And when I reported rough driving and problems with the engine, they offered to charge me $175 for a diagnostic fee. The engine is still driving rough and making knocking noises.

Filed Nov 5, 2025 · Driver assistance, Engine · FL

The contact owns a 2019 Infiniti QX50. The contact received notification of the federal safety agency 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 an undisclosed speed, there was an abnormal knocking sound coming from the engine. Most recently, while stopped at a traffic light or stop sign, the automatic emergency braking system indicated that the vehicle in front was too close, even though the vehicle was at a safe distance. Several unknown warning lights were illuminated. The local dealer was not contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The failure mileage was unknown.

Filed Oct 3, 2025 · Engine · 16,700 miles · LA

The contact owns a 2019 Infiniti QX50. The contact stated that while driving at various speeds, there was an abnormal knocking sound coming from the vehicle. There was no warning light illuminated. The contact then received notification of the federal safety agency Campaign Number: 25V437000 (Engine and Engine Cooling); however, the part for the recall repair was not yet available. The contact called the dealer and was informed that a diagnostic test needed to be performed to determine the cause of the failure. The manufacturer was notified of the failure but offered no assistance. The vehicle was not repaired. The failure mileage was approximately 16,700.

Filed Sep 30, 2025 · Engine · 81,000 miles · DE

The contact owns a 2019 Infiniti QX50. The contact stated that while driving 60 MPH, there was an abnormal knocking sound coming from the vehicle with the check engine warning light illuminated. The vehicle was taken to two separate dealers. The vehicle was later towed to an independent mechanic, and a diagnostic test was performed and diagnosed with engine failure. Upon investigation, the mechanic discovered the federal safety agency Campaign Number: 25V437000 (Engine and Engine Cooling); which the contact linked to the failure. The contact called the dealer about the recall and informed the dealer that the vehicle had experienced the failure. The contact was informed that a diagnostic test was needed to verify the defect. The manufacturer was notified of the failure but offered no assistance. The vehicle remained with the independent mechanic unrepaired. The failure mileage was approximately 81,000.

Filed Sep 15, 2025 · Engine · 67,000 miles · NJ

The contact owns a 2019 Infiniti QX50. The contact stated that while driving approximately 55 MPH, the vehicle was vibrating, and the vehicle stalled. There was no warning light illuminated. The contact attempted to pull over and felt that the vehicle had lost power steering assist functionality. The contact stated that extra effort was needed to steer the vehicle. The vehicle was shifted to park(P), and the check engine and oil warning lights illuminated. The contact attempted to restart the vehicle, but there was an abnormally loud knocking sound coming from the engine. The contact had the vehicle towed to a local dealer, where it was diagnosed but was not yet repaired. The contact was aware of the federal safety agency Campaign Number: 25V437000 (Engine and Engine Cooling). The manufacturer was informed of the failure, and the contact advised the manufacturer that the VIN was included in the recall, and the contact was informed that there was no fix for the issue. The failure mileage was approximately 67,000.

Filed Sep 3, 2025 · Electrical, Engine · CT

Vehicle Issue Summary – 2021 INFINITI QX50 I purchased a 2021 INFINITI QX50 in March 2024. Recently, I received notice of an active safety recall (the federal safety agency 25V437) related to the VC-Turbo engine bearings. In addition to the recall alert, I’ve also experienced several concerning symptoms: 1) A knocking noise when reversing. 2) The malfunction indicator light turning on and off intermittently. 3) Other irregular behaviors that raise concerns about engine performance and overall safety. Given the recall and these symptoms, I’d like to schedule an immediate inspection and any necessary repairs. My job requires me to drive multiple children on a daily basis and is a safety concern for the family I work for. This effects my work situation tremendously and my ability to perform my job responsibilities.

Filed Aug 27, 2025 · Engine · IL

I was driving at the intersection of South I-55 and I-355 on the left most lane at 70 mph. All of a sudden, my car started knocking and since there was no shoulder to the left I had to move to the right by managing to get through multiple lanes to get to shoulder safely. Given the issue with engine, it would not accelerate so I had to safely decelerate and come to a stop. I called the towing company and they towed my car to the dealership. This car had a recall when the dealer contacted me and I had them take a look at 98K miles and they stated everything was fine. Following few weeks later, the engine completely gave out. The dealer is working with manufacturer to get the engine replaced. However, he is not sure who will pick up cost for replacing turbo. Turbo is part of the engine and should also be replaced under the recall. Needless to say, this was a dangerous situation and I am glad the situation had a safe outcome.