2017 INFINITI Q50 Engine Problems

My vehicle has been stalling and burning/leaking oil internally for some time now with white smoke coming from the rear. Well Infiniti sent a post card and stated that the emission warranty is extended for 120,000 miles which my vehicle has had the issue for some time and it was already over 120k miles at the time of the loss. The issue Infiniti reported in their postcard is, you may experience issue with the turbocharger, Overtime there is a possibility for the turbocharger thrust bearing to wear and leak oil internally. The most likely conditions you will experience are excessive white smoke from the exhaust, MIL-On an in rare cases reduced engine power or damage to the internal components. My vehicle is experiencing all these issues reported and the company, Infiniti, knows this is an issue and did not issue a recall the extended warranty instead, most people will not qualify for which will require people to thousand of dollars replacing the turbocharger assembly and engine control model. I got a quote and was told 8000 dollars unfortunately I cannot have repairs done. I believe it was January 2025 when the post card came from Infiniti identifying the issue

The engine and turbo system failed in my 2017 Infiniti Q50 Signature Edition (VIN [XXX] ). The vehicle remains at CarMax Naperville, where it has been since March 2025. Internal repair orders show CarMax performed two failed inspections in August 2020 before selling the vehicle as “CarMax Certified” on September 3, 2020. The vehicle should not have passed certification. Shortly after purchasing the vehicle, I noticed it was pulling hard to the right. During my first tire rotation and oil change, the technician informed me that all four tires were severely dry-rotted and unsafe to drive on. CarMax had represented the vehicle as fully inspected and road-ready. These conditions suggest the vehicle had sat for an extended period after a prior four-point accident and should have never been certified for sale. None of this was disclosed to me at purchase. In March 2025, the engine failed. CarMax later reported that a replacement engine was installed, part #10102-6HN3A (single-turbo) instead of the required #10102-5CH2D (twin-turbo VR30DDTT). This engine does not match the original factory specifications for my VIN. Infiniti of Naperville confirmed that my vehicle qualifies for a free extended turbo and engine warranty (TSB P4A05/P4A06), but CarMax declined to use the required OEM one-time-use parts, voiding that coverage. CarMax has refused to provide inspection reports, diagnostic data, emissions test results, or engine serial numbers despite over forty written requests. I have no documentation confirming what work was performed or whether the vehicle is safe or compliant with emissions standards. The car has now been sitting at CarMax for over seven months, with rusted brakes and unknown mechanical condition. They are just concerned about me coming to get the car. This raises serious concerns about safety, emissions compliance, and potential consumer fraud involving improper certification and undisclosed prior damage. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Subject: Urgent: Check Engine Light After Vehicle Return I am contacting you regarding my vehicle, I dropped it off the dealer for oil change & they informed me it was recalled so they have to fix it, but they returned it to me with engine light on. They mentioned after fixing the recall the engine light came on…tested it and showed thermostat, but to pay 249 for them to diagnose because it’s a different problem, but that issue wasn’t there when I took my car. I have never had the check engine light on. I want my car back without the check engine light on. They now saying it’ll be $2700 to fix that. I said, no. They mentioned giving me a discount and it’ll be 1800 and they’ll cover labor. I said, all I want is my car back the way it was when I brought it. Then they changed it to $3400 I am very concerned about this and would like to understand why the vehicle was returned to me in this condition. I ask that you please review this issue and arrange for a prompt inspection and resolution — at no additional cost — as this may be related to the recent service or handling by your team. Please respond as soon as possible with next steps. I’d prefer to resolve this directly with your service department, but I will escalate the matter if necessary. Sincerely, [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I bought my q50 in 2020. In 2023 one of my turbo chargers began experiencing failure. This defect caused the car to drive in limp mode where it would not accelerate and caused a hazard to myself and other drivers on the road. The failure did not display any lights on my dash and I only came to know the component failed after the physical symptoms it presented and having it diagnosed by infinit. Infiniti has now issued an extended warranty for up to 120k miles on the part for owners with the defective turbos. The warranty letter also states that if owners previously replaced the part out of pocket they could seek reimbursement with proof of the repair and proof of ownership. I submitted my documents to Infiniti and they have since closed my case without reimbursement because they claim one of their associates made a mistake in beginning the claims process with me. I have attempted to continue to pursue reimbursement and Infiniti won’t return my calls. I know for certain my car and the turbo repairs qualify for this reimbursement. I believe Infiniti is attempting to work around officially recalling the cars impacted by the bad component and the warranty is being provided in its place however I also believe they are giving me such a hard time with this in hopes that I’ll just roll over and give up on the reimbursement

My car has a start and stop problem and the dealer reprogram the ecm but it didn't work got back on the road and almost got hit twice bc my car went into limp mode. And they won't fix up unless I pay even know it's a recall and my drive shaft has a recall but they said that was close out

In October of 2023 I was driving onto the high way and my car just started to slow down I could not accelerate that gas while I was on the highway which is very dangerous when you are on the highway. My car turn off completely the engine light started to blink. All the lights were blinking. The only thing that was on was my radio. I could not move the car I was having. Trouble putting the car into park. Everything was stuck. Good thing I was not in the middle of the highway and not on a really busy highway but it was late at night. Drivers on the high way and myself are out at risk I could not even put my hazards on. A car could have crash into me and serious injury’s could have happen. I was stuck and was having trouble putting the car in park. Could not go into neutral. For a car to come to a sudden stop not be able to put the car in park that can be a risk factor due to if the car turn back on going into neutral on its own. The car was fixed with new engine at an auto body In July or August 2024 Now the engine light is on again the car will not even turn on. All the oil leaked out. Infiniti did my last oil change and said it was due at 117k which that is my current reading. When the oil all leaked out the car had a steering issue it crashed into a guardrail. That is the second time the car slow down had some type of issue is a big risk factor In August 2024 when the oil came out the car that can cause a fire and lost of steering the car crashed into rail with us in it. I did not have any warning signs about this going to happen. The car has not been driven since

Independent service center ran diagnostics and Code that pops up is the P0090. FUEL PUMP .no inspection by dealership when requested. We called dealership and they wanted to charge for inspecting vehicle. When driving vehicle stalls,in the middle of traffic. Check engine light turned on .No exaleracion when I press gas pedal. Very dangerous it stalled in the middle of traffic with children in vehicles.. the car goes to limp mode and didn't want to move . The muffler smokes and when checked the engine oil smells like gas.

The engine in this car needs to be replaced. The main bearing is failing, head gasket blew, and coolant has leaked into the engine. About August 30, 2023 I had a sudden coolant loss followed by temperature spike. If the engine had seized while driving, it could have caused a loss of power and locked up the drive train. After sitting while i tried to determine the coolant loss and temp spike, i made arrangements with a local infiniti dealer about jan 9 with a drop off date of jan 22 or 23. The dealer has confirmed the bearing, oil, coolant issue. There were no warning lights or check engine lights before the issue occurred.

When i was driving in highway, all of a sudden gas paddle stop working no matter how hard i press it is not taking gas paddle and not picking up speed. I was panicking, lucky nobody behind me. Nothing bad happen, but this is very dangerous in my opinion.

Turbos blow prematurely, and the motor can end up with porus block at any mileage

The car needed new sprockets after 105K miles. I haven't seen anyone else have this problem, so my car maybe a lemon. But just in case more people start reporting it, I just want to make sure it's on record. The dealership has no idea why they'd fail, as I have had regular, full synthetic oil changes. It's a hefty repair.

Engine failure due to porous motor and oil deprevation related to a tsb

The contact owns a 2017 Infiniti Q50. The contact stated that while his son was driving at approximately 45 mph, the vehicle shut off without warning. Due to the failure, his son lost complete control of the vehicle and drove into a ditch. The air bags did not deploy. The contact's son was not injured as a result of the accident and did not seek medical treatment. The police were not called to the scene and a report was not filed. Due to the failure, the vehicle was towed from the scene to an independent auto repair shop. The contact was informed by the auto repair shop the serpentine belt had shredded inside the engine which caused the failure. They also informed him that there was a service bulletin on the vehicle in relation to the failure. The contact's son reached out to the manufacturer where they both agreed to an unknown settlement. The vehicle had been repaired. The failure mileage was 28,097.

Mileage: 28,097

CAMSHAFT POS SENSOR WENT OUT DURING DRIVING. CAR LOST POWER AND JERKED. HAD CAR LOOKED AT BY INDEPENDENT SERVICE STATION AND HEARD KNOCKING. BROUGHT CAR TO DEALERSHIP AND WAS DETERMINED TO HAVE A BLOWN ENGINE. WAS SPECIFICALLY TOLD THAT THE TURBOS WERE 'EATING' THE OIL AND NOT ALLOWING OIL TO FLOW TO LOWER END OF MOTOR. WHICH CAUSED FAILURE TO MAIN BEARING IN CYLINDER 3. CAR NEEDS A NEW ENGINE. SERVICE DEPARTMENT HAS SEEN THIS BEFORE WITH SAME YEAR MAKE AND MODEL OF VEHICLE

Mileage: 99,000

WHILE DRIVING ON A HIGHWAY (I95, SPEED 55 MPH) THE ENGINE SUDDENLY DIED, WAS ABLE TO PULL OVER AND RESTART THE ENGINE, WHICH NOW MADE A TERRIBLE MECHANIC NOISE. COULD DRIVE OFF TO A SMALLER ROAD WHERE THE ENGINE STALLED AGAIN. HAD TO TOW THE CAR TO THE DEALER, WHO ADVISED THAT THE ENGINE NEEDED TO BE CHANGED. TWO WEEKS LATER THE ENGINE WAS FINALLY CHANGED BUT NOW THIS TIME THEY STATED THAT THE TURBOS NEEDED TO BE CHANGED. THE PARTS WERE, HOWEVER, ON BACK ORDER - DEALER CANNOT SAY HOW LONG BEFORE IT CAN BE REPAIRED. AFTER 3 WEEKS AND MANY PHONE CONVERSATIONS I STILL DO NOT HAVE A CAR. THIS IS AFTER ALL A NEW (18000 MILES) >50K CAR BUT APPARENTLY IT WAS NOTHING BUT A LEMON.

Mileage: 18,000

I HAVE A INFINITI Q50S REDSPORT 2017 ACTUALLY HAVE 34000 MILES IN THE ODOMETER. THIS CAR HAVE A FACTORY DEFECT THAT INVOLVES ENGINE PARTS IN THIS CASE SERPENTINE BELT, BELT TENSIONER AND PULLEYS. THERE IS A TSB AT THIS TIME FOR THIS ISSUE BUT IN THE MAJORITY OF CASES THE CARS STILL SHOWING UP THE ISSUE. MAJOR ISSUE AT THIS TIME IS THAT SERPENTINE BELT BROKES WHILE CAR IS ON MOVE. THE CAR NEEDS TO BE STOPPEND SINCE ENGINE OVERHEAT AND ALSO BATERRY LIGHT GOES ON. THE BELT TENSIONER GET STUCK AND PULLEYS IN SOME OF THE CASES MELT DOWN. IN MY CASE MY CAR HAS VISITED 2 TIMES WITH THE SAME ISSUE. THERE IS A TSB THAT PRETEND TO FIX THAT ISSUE REALIGNING THE AC COMPRESSOR. AT THIS TIME THERE IS FEW HOUNDREDS MAYBEE MORE CARA AFFECTED. I THINK THIS IS A MAJOR ISSUE SINCE THE SERPENTINE BELT BROKE AND ENGINE STOP BEING FUNCTIONAL DUE OVERHEATING. THIS CAN CAUSE A MAJOR ACCIDENT OR OTHER SECURITY PROBLEM.