Infiniti Q50 Complaints

514 consumer complaints on file.

#11744293June 15, 2026
STEERING
Affected: Steering/Electrical/Direct Adaptive Steering, 50K miles While driving my 2017 Infinity Q50s under normal driving conditions, the vehicle suffered an instantaneous, catastrophic, and total failure of the power steering assist system without any prior warning or dashboard fault indicators. The sudden loss of steering assist immediately caused the steering wheel to become incredibly heavy and virtually locked, requiring extreme, dangerous physical exertion to maintain minimal control over the direction of the vehicle. Due to the violent and unpredictable change in steering dynamics at speed, I was forced out of my lane and ran over a curb and came moments away from experiencing a severe, life-threatening collision. The vehicle was rendered entirely undrivable and presents an immediate, catastrophic crash hazard. It had to be flatbed-towed to Infinity Valencia dealership. I am the original owner of this vehicle, and it has been meticulously maintained with exceptionally low mileage of 50,000 mile. Infinity previously issued mandatory federal safety recalls identical Direct Adaptive Steering (DAS) "steer-by-wire" software and module failures on the 2014-2016 model years (e.g., NHTSA Campaign number 16V433000). While the manufacturer asserted that the underlying engineering and software defects were fully resolved for the 2017 production year, this incident definitely proves that the catastrophic safety defect remains active, unmitigated, and present in the 2017 model year. Infinity Consumer Affairs and corporate databases currently lack proactive safety campaign for this specific VIN, leaving consumers entirely expose to a known, severe safety liability. I am filing this formal complaint to urge the National Highway Traffic Safety Administration (NHTSA) to open a formal defect investigation into the 2017 Infinity Q50/Q50s steering architecture and compel the manufacturer to expand the safety recall before this unmitigated defect results in fatal accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11743844June 13, 2026
SERVICE BRAKES, ELECTRICAL SYSTEM, ENGINE
Something happened to cause power loss. I checked the recalls and work that was supposed to be performed but didn’t get done like it was supposed to. I need to have it checked now asap! I see 2 engine replacements and also the turbos and 2 of the catalytic converters. The last 2 need replacing as well or it’s not going to be right.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11743846June 13, 2026
TIRES, TIRES:SIDEWALL
Had 2 new tires installed on the rear of the car and they both busted at the seam. Shredded the tires and damaged 4 wheels.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11742781June 8, 2026
AIR BAGS
The contact owns a 2018 Infiniti Q50. The contact stated that while driving at an undisclosed speed, the front passenger Occupant Classification System (OCS) sensor became inoperable. The vehicle was taken to the dealer, where it was diagnosed that the front passenger OCS sensor had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 59,200.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11739745May 23, 2026
ENGINE
I have had several major problems with this car's engine. Once it shut down (was detecting no oil but was full) while on the interstate. Had to replace the radiator fan assembly and module. Coolant Leaks
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11738654May 18, 2026
ENGINE
own a 2019 Infiniti Q50 3.0t Sport with approximately 80,000 miles. The vehicle began experiencing engine knocking/ticking noises, rough idle, hesitation under acceleration, shaking, and intermittent misfire symptoms. The issue continued even after replacing spark plugs and ignition components. The dealership/mechanic reported possible internal engine damage and metal shavings in the oil, indicating potential failure of internal engine components. The vehicle has been regularly maintained with oil changes completed on schedule. This appears to be a widespread issue affecting many Infiniti and Nissan vehicles equipped with the VR30 3.0 twin-turbo engine. Numerous owners online report similar symptoms including engine knocking, turbo failure, metal contamination, loss of power, and premature engine failure at relatively low mileage. The issue creates a serious safety concern because the vehicle can lose power, hesitate during acceleration, or potentially fail while driving in traffic or on highways. I am requesting that NHTSA investigate repeated engine failures involving the VR30 engine platform used in Infiniti Q50/Q60 and related vehicles.”
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11738665May 18, 2026
VEHICLE SPEED CONTROL
OUTPUT SPEED SENSOR on 2016 INFINITI Q50t - Took vehicle in for oil and filter change 2 days ago. I drove the car about 40 miles, without incident. Went back to same place for state inspection yesterday. I drove about 2 miles from the inspection place and park in shopping lot. Went in business to shop for about 30 minutes. Returned to vehicle and drove about 100 yards through the parking lot. The car appeared to lose power and made a jerking movement as if it didn't want to go. I drove out onto a very busy street and we were almost rear ended by other traffic. I pulled up in another parking lot to assess the problem. I could not determine what was causing the car not to pick up speed. I drove to an AutoZone: battery checked out at 90 percent good; no electrical problems noted either. I drove off about 1 block from AutoZone: the CEL came on for the first time. I went back to the AutoZone to get them to check it out. The diagnosis code is P0720: vehicle speed sensor. I went back to the inspection shop the next day and I was told the same code. I took the vehicle to the dealership and I was told that I need to replace the whole transmission. I purchased the vehicle about 8-1/2 years ago; garage kept; only put 60k miles on car since purchase. Car has approx. 108k miles now. This is not only a problem with 2014 -2015. When I purchased the car in 2018, I feel like the dealership should have informed me that this was a problem with Q50s. This is not just an issue with previous years; this is a problem with 2016 as well. This vehicle is very clean/outstanding: no accidents, no body damage, immaculate leather seats, no repairs in 8-1/2 years and all of a sudden this fault code comes up with no previous indication that the transmission was not working properly. There needs to be a RECALL for this vehicle due to this common issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11737881May 14, 2026
POWER TRAIN, ELECTRICAL SYSTEM, ENGINE
The valve body on these cars are useless. Driving down a highway and cant shift out of 3rd gear almost had a car re-end me. Today I am driving and the ECU is not responding I see the check engine light on then I'm like not again. This would be the 3rd valve body I replaced. First I replaced the whole transmission thinking that is what I needed and advised that the valve body and the transmission are one. Yet no they come in parts. Anyways today I am waiting to get home, but the car is not reading my key fob why? Then the ECU and code U0100 is popping up. Something new and turns the car off. The shifting that happen earlier was just a light bulb of I already knew what is wrong. I felt the car shift with a hunch so I looked at my dash board and saw the check engine light again and was like not again. Please not again. Now on the dash board I see AWD and chassis issue. Then online I am told electrical problem and or ECU module not reading correctly. Like what is up with these push to starts. They are becoming a headache. I need to know just why I am replacing my valve body now for the 4th time???? This all can cause an accident that my car randomly slows down.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735910May 5, 2026
ELECTRICAL SYSTEM, BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
I am submitting this complaint regarding a safety defect in my 2018 Infiniti Q50, which was manufactured prior to May 1, 2018. Despite matching the make, model, and production timeframe associated with an existing Infiniti recall for backup camera failures, my specific vehicle is not included in the recall population. The backup camera in my vehicle intermittently fails to display an image or presents a blank or distorted screen when the vehicle is placed in reverse. This defect significantly impairs rear visibility and increases the risk of a collision, particularly in situations involving pedestrians, children, or obstacles that may not be visible through mirrors alone. The backup camera is a critical safety feature, and its failure directly compromises safe vehicle operation. The exclusion of my vehicle from the recall is concerning, given that it shares the same model year, platform, and manufacturing period as those already identified as defective. This suggests that the defect may be more widespread than currently acknowledged. A malfunctioning backup camera is not a minor inconvenience as it creates a clear and preventable safety hazard. I urge the NHTSA to review this issue and consider expanding the scope of the existing recall to include all affected 2018 Infiniti Q50 vehicles, including those manufactured before May 1, 2018, that are currently excluded. Additionally, I encourage further investigation into the consistency and reliability of the backup camera systems in this model line. This complaint is submitted not only to address my individual vehicle but also to contribute to a broader understanding of a potential safety defect that may affect other drivers. I believe that multiple reports of similar issues will help prompt appropriate action to ensure public safety. Thank you for your attention to this matter.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11732566April 20, 2026
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
While operating the vehicle under normal driving conditions, the engine experienced a significant loss of power and reduced acceleration. The issue is believed to be related to turbocharger failure within the engine system. The loss of power created a safety concern, particularly when attempting to merge into traffic and maintain highway speeds. The vehicle did not respond as expected when acceleration was needed, which could increase the risk of an accident in certain driving situations. The problem has been confirmed by a dealership service department, and the vehicle is currently available for inspection. The diagnosis indicates that the turbochargers require replacement. Prior to the failure, there were limited warning signs. Any warning indicators were either minimal or appeared shortly before the issue became noticeable. The failure occurred at approximately 107,000 miles. Based on publicly available information, similar failures have been reported on this vehicle model, suggesting a possible pattern related to the turbocharger system.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11731441April 15, 2026
POWER TRAIN, VEHICLE SPEED CONTROL
The transmission speed sensor has failed needs a new valve body. It seems like a very common problem with this car and it’s a $3000 fix according to my mechanic. I think there needs to be a recall issued considering everybody on this website is reporting the same problems.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730686April 12, 2026
ENGINE
The twin turbo failure is a known issue with Infiniti. I took my vehicle to the dealership and it was diagnosed with having a passenger side turbo failure. I have 145K miles on my vehicle. It is outside of the warranty period and very expensive to repair. Infiniti knows there is a problem regarding turbo failure in the Infiniti Q50 and the consumer is forced to deal with expensive repairs $7K for one turbo per the dealership. Had I been made aware of there being a problem, I would not have purchased an Infiniti.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730143April 9, 2026
ENGINE
The vehicle experienced a failure while driving, producing heavy smoke and requiring the car to be stopped immediately. The “Low Oil Pressure – Stop Vehicle” warning light illuminated on 2/19/2026. The vehicle was subsequently taken to an Infiniti dealership for inspection. Upon evaluation, the dealer determined that both turbochargers have failed and are leaking oil. The turbochargers are covered under an existing warranty extension; however, the engine has failed also. The vehicle experienced a catastrophic engine failure at approximately 50,230 miles, after which both the engine and turbochargers were replaced under warranty with the cause listed as undetermined. Both the original and replacement engines have now failed in the same manner, with turbochargers leaking oil and producing visible smoke, indicating a likely recurring defect or unresolved underlying issue. The replacement engine failed after only 40,000 miles, further raising reliability concerns. Infiniti quality actions (P4A05 and P4A06) identify turbocharger oil leakage as a known issue, aligning with the current failure. The dealership has confirmed the turbochargers are leaking oil but will only replace them if a full engine replacement is authorized by me at a cost of $15,556.49.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729283April 5, 2026
SERVICE BRAKES, SUSPENSION, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
On April 2nd I took my vehicle into the dealer for recall servicing. After leaving the dealer I had my vehicle inspected the next day by a third party repair shop and my brake caliper was missing the main bolt that connects to the brake pad. Brake pads were also less than 5% wear remaining. Myself and others were put in serious danger if my brakes had failed due to this serious oversight and disregard. My suspension also was unsafe in the rear but the dealer carried out a multi point inspection stating everything passed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11728782April 2, 2026
ENGINE AND ENGINE COOLING
See attached document for complaint.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11728681April 1, 2026
POWER TRAIN
Ever since I got the vehicle transmission is trying to give out on the vehicle takes too long to shift gears, takes more rpm to shift gears
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11725568March 19, 2026
ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER
Odometer Fraud. The contact purchased a 2018 Infiniti Q50. It was discovered that there were three separate mileage discrepancies. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 50,370; however, at the time of registration, it was discovered that the mileage had been rolled back from 54,000 to 28,630 miles. The mileage before the vehicle was purchased was 47,650.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723190March 10, 2026
AIR BAGS, SEATS
The passenger seat occupant sensor is on. Dealer confirmed the code is related to a bad sensor so even if someone is sitting in the passenger seat and we are in an accident the airbag will not deploy. The dealer said a recall exists for earlier models but not for the 2017 even though they say it’s the same components. They want to charge me between $6,000 to $8,000 to repair which is almost as much as the car is worth. This unfortunately is cost prohibitive at this time so we are driving with the known risk. The light has been on for a couple of years now as we were hoping an additional recall would come out but it hasn’t which is why I am submitting this report.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723136March 9, 2026
FUEL/PROPULSION SYSTEM
The problem is on the recall, I understand my car is not on the VIN recall list but it's the same problem. Potential Recalls for 2017 Q50: Fuel Pump Control Module (2.0L engines): Improper software may cause the engine to stall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11722204March 5, 2026
POWER TRAIN:AUTOMATIC TRANSMISSION
The contact owns a 2015 Infiniti Q50. While driving at various speeds, the transmission was slow to shift. The vehicle failed to properly accelerate while depressing the accelerator pedal, and the check engine warning light remained illuminated. The vehicle was taken to a local transmission mechanic to be diagnosed, and it was determined that the gear ratio and speed sensor inside the transmission valve body were faulty, and that the valve body needed to be replaced. The valve body was replaced, and the failure was repaired; however, one week later, the failure reoccurred. The vehicle was taken back to the mechanic, and it was informed that the transmission needed to be replaced. The vehicle was not yet repaired. The manufacturer and local dealer were not contacted. The failure mileage was 99,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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