2021 INFINITI Q50 Problems

In August 2026, while driving, the vehicle suddenly lost acceleration and engine power and would only travel at a very slow speed. The check engine light came on. The driver had to safely stop, turn the engine off, and restart it. After restarting, the vehicle temporarily regained acceleration and normal speed. This problem has occurred more than once and creates a serious safety risk in traffic, especially when merging or crossing intersections. An INFINITI dealer inspected the vehicle and advised that the problem may involve the turbocharger system, with repairs estimated at approximately $4,000. INFINITI Consumer Affairs was contacted about the loss of acceleration but declined financial assistance because of the vehicle's mileage/warranty status. The vehicle was previously an Enterprise rental vehicle and had prior INFINITI service history. The vehicle is available for inspection. I am requesting investigation of this sudden loss-of-power condition.I am aware that NHTSA Recall 21V-234 / INFINITI Campaign R20C5 involved certain 2021 Q50 vehicles and an ECM software condition associated with a warning light, reduced power, and possible engine stall while driving. My VIN currently shows 0 unrepaired recalls, but I am requesting verification of whether this campaign ever applied to my vehicle and, if so, when and at what mileage the ECM reprogramming was completed. My vehicle is now experiencing a Check Engine Light and sudden loss of acceleration/power while driving, which temporarily improves after the engine is shut off and restarted. I am also aware of INFINITI TSB ITB22-038D/EM22-007D concerning turbocharger replacement procedures for 2016–2024 Q50 vehicles equipped with the VR30DDTT engine. I request investigation of whether my present loss-of-power condition is related to the ECM, turbocharger/boost system, or another safety-related defect.

I purchased a new 2021 Infiniti Q50 from Infiniti of Cool Springs on September 28, 2020. There was an incident on January 13, 2022 due to a manufacturer defect that caused my car to accelerate on it’s own. I was parked at a car wash to vacuum my vehicle. I had my foot on the brake to move the gear shift into park when my car rapidly accelerated which caused me to crash through a metal fence that separated the car wash from the adjacent property. I have an added safety feature on my vehicle to prevent a forward collision with emergency breaking that also didn’t implement. There wasn’t any warnings, indications or symptoms beforehand. I had my Infiniti for 16 months with only 20,766 miles on it at the time of the incident. This malfunction could present a serious public safety issue. I or someone else could have been seriously injured in a different scenario. It was fortunate that I was stopped and no one was in front of the car. Nissan issued a recall on April 3, 2021 for the problem of rapid acceleration. The dealership without my knowledge completed the recall on my vehicle on April 1, 2021 which evidently didn’t fix the problem. Nissan and the dealership have been and are therefore aware of the problem. Infiniti Consumer Affairs nor the dealership want to assume any responsibility for the malfunction. An inspection has not been performed yet. Infiniti Consumer Affairs requires me to assume responsibility for the cost of a rental during the 6 - 8 week inspection of my vehicle along with the cost of any storage fees. The vehicle can be inspected at Infiniti of Cool Springs. It’s been there since the incident.

In August 2026, while driving, the vehicle suddenly lost acceleration and engine power and would only travel at a very slow speed. The check engine light came on. The driver had to safely stop, turn the engine off, and restart it. After restarting, the vehicle temporarily regained acceleration and normal speed. This problem has occurred more than once and creates a serious safety risk in traffic, especially when merging or crossing intersections. An INFINITI dealer inspected the vehicle and advised that the problem may involve the turbocharger system, with repairs estimated at approximately $4,000. INFINITI Consumer Affairs was contacted about the loss of acceleration but declined financial assistance because of the vehicle's mileage/warranty status. The vehicle was previously an Enterprise rental vehicle and had prior INFINITI service history. The vehicle is available for inspection. I am requesting investigation of this sudden loss-of-power condition.I am aware that NHTSA Recall 21V-234 / INFINITI Campaign R20C5 involved certain 2021 Q50 vehicles and an ECM software condition associated with a warning light, reduced power, and possible engine stall while driving. My VIN currently shows 0 unrepaired recalls, but I am requesting verification of whether this campaign ever applied to my vehicle and, if so, when and at what mileage the ECM reprogramming was completed. My vehicle is now experiencing a Check Engine Light and sudden loss of acceleration/power while driving, which temporarily improves after the engine is shut off and restarted. I am also aware of INFINITI TSB ITB22-038D/EM22-007D concerning turbocharger replacement procedures for 2016–2024 Q50 vehicles equipped with the VR30DDTT engine. I request investigation of whether my present loss-of-power condition is related to the ECM, turbocharger/boost system, or another safety-related defect.

The contact owns a 2021 Infiniti Q50. The contact stated that while driving approximately 70 - 80 MPH and attempting to accelerate, the vehicle would accelerate but failed to exceed 10 MPH. The accelerator pedal had to be depressed to the floorboard for the vehicle to accelerate; however, the vehicle still failed to exceed 10 MPH. During the failure, the check engine warning light was temporarily illuminated. The contact intended to have the vehicle towed to the dealer, which was called and informed of the issue. The dealer informed the contact that the VIN was not included in NHTSA Campaign Number: 21V234000 (Engine and Engine Cooling). The failure mileage was approximately 82,000.

The contact owns a 2021 Infiniti Q50. The contact stated that while driving at undisclosed speeds, the air bag warning light illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The contact called an independent mechanic, but no assistance was provided. The manufacturer was not contacted. The failure mileage was approximately 35,000.

I was driving home on the Veterans Expressway in Tampa traveling about 65 mph when a sound like a gunshot almost caused me to lose control as I swerved out of fear - thankfully no other vehicles were nearby. I pulled over at the next exit in a public place and discovered my sunroof class had a piece of glass missing and it looked like it was pushed upwards. I knew this is not normal and never had I had this happen in any other car I owned with a sunroof. I had very small slivers of glass inside the car which cut my fingers because they were not visible, along with the tempered glass. Since it was going to rain, I drove home and put in garage to avoid water damage. I called the dealership in Sarasota and they stated this was reported by another customer in recent months. There was no warning there was a problem with my sunroof, nothing hit it, and it had been opening and closing with no problems. I’m lucky not to have crashed. In addition, flying glass that broke free created an even more dangerous situation for other drivers - thankfully the road was empty - by the time I was able to get to a gas station closer to home, the majority of the glass was missing. I researched the problem online and discovered numerous reports online suggesting this is a frequent problem with Nissan/Infiniti - apparently there is already a class action suit, but not for my model. Please investigate this dangerous problem immediately and ask Infiniti to inspect and issue recalls on their sunroofs. Unfortunately I believe they know a problem exists and have not issued a recall for the safety of their consumers. The cost to repair is in the thousands and I am without a car plus there are glass shards inside my car. **I tried to upload pictures but wasn’t able to do it from my phone - I have multiple pictures to share

The contact owns a 2021 Infinity Q50. The contact stated that the vehicle was recently purchased from a dealer. When the vehicle was purchased, the tires were replaced. The vehicle was later taken to the dealer for maintenance, and while at the dealer, the contact was informed that there were nails in the tires and that the tires needed to be replaced. The contact checked the sticker on the door panel for the tire information. The contact stated that the sticker indicated that the wheels were 18-inch rims. The vehicle was taken to the dealer to install the new tires, and the contact was informed that the rims on the vehicle were 17-inch rims. The vehicle was purchased at a CarMax dealer, and the contact asked why the 17-inch rims on the vehicle. The contact was informed that the ride would be better with the 17-inch rims and tires. The rims were not replaced. The manufacturer was not notified of the issue. The failure mileage was approximately 44,000.

In August 2026, while driving, the vehicle suddenly lost acceleration and engine power and would only travel at a very slow speed. The check engine light came on. The driver had to safely stop, turn the engine off, and restart it. After restarting, the vehicle temporarily regained acceleration and normal speed. This problem has occurred more than once and creates a serious safety risk in traffic, especially when merging or crossing intersections. An INFINITI dealer inspected the vehicle and advised that the problem may involve the turbocharger system, with repairs estimated at approximately $4,000. INFINITI Consumer Affairs was contacted about the loss of acceleration but declined financial assistance because of the vehicle's mileage/warranty status. The vehicle was previously an Enterprise rental vehicle and had prior INFINITI service history. The vehicle is available for inspection. I am requesting investigation of this sudden loss-of-power condition.I am aware that NHTSA Recall 21V-234 / INFINITI Campaign R20C5 involved certain 2021 Q50 vehicles and an ECM software condition associated with a warning light, reduced power, and possible engine stall while driving. My VIN currently shows 0 unrepaired recalls, but I am requesting verification of whether this campaign ever applied to my vehicle and, if so, when and at what mileage the ECM reprogramming was completed. My vehicle is now experiencing a Check Engine Light and sudden loss of acceleration/power while driving, which temporarily improves after the engine is shut off and restarted. I am also aware of INFINITI TSB ITB22-038D/EM22-007D concerning turbocharger replacement procedures for 2016–2024 Q50 vehicles equipped with the VR30DDTT engine. I request investigation of whether my present loss-of-power condition is related to the ECM, turbocharger/boost system, or another safety-related defect.