2017 Infiniti Q50

I experienced an ongoing grinding/rattling noise from the wheel/brake area. The vehicle was serviced multiple times by a franchised dealer, which diagnosed the issue as brake-related and performed brake repairs. The noise was not resolved, and the vehicle was returned in the same condition. Shortly after service, an independent mechanic discovered a cracked/broken brake pad installed on the vehicle. Due to safety concerns, the manufacturer authorized inspection at a separate franchised dealership under different ownership. That inspection confirmed aftermarket brake pads, rotors, and related components of unknown origin installed on both the front and rear, missing OEM hardware, improper lubrication, and wheel bearing issues contributing to the noise. The inspecting dealer documented that the braking system must be returned to OEM specifications before safe operation and further diagnosis could continue. Despite this, the manufacturer has declined to require OEM remediation, and the vehicle continues to operate with unauthorized aftermarket brake components. The grinding noise has continued and has since shifted toward the rear. The condition is reproducible, documented by video, and confirmed by independent inspection. I believe the vehicle was returned to service in an unsafe condition involving a critical braking system.

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)

The contact owns a 2017 Infiniti Q50. The contact stated while driving at various speeds, the vehicle would shudder while the brake pedal was depressed. The contact stated no warning lights was illuminated. The vehicle was not taken to a local mechanic to be inspected. The manufacturer was not informed of the failure. The failure mileage was approximately 16,000.

TL* THE CONTACT OWNS A 2017 INFINITI Q50. THE CONTACT STATED THAT THE VEHICLE PULLED TO THE RIGHT WHILE DRIVING. ADDITIONALLY, THE VEHICLE SHOOK ABNORMALLY WHEN THE BRAKE PEDAL WAS DEPRESSED. THE VEHICLE WAS TAKEN TO MIKE WARD INFINITI (1800 LUCENT CT, HIGHLANDS RANCH, CO 80129, (303) 350-4300) AND THE CONTACT WAS INFORMED THAT THE REAR ROTORS NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE CONTACT WAS CONCERNED THAT THE CONTROL ARMS ALSO NEEDED TO BE REPLACED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND REFERRED THE CONTACT BACK TO THE DEALER. THE FAILURE MILEAGE WAS 35,000.

I PURCHASED MY 2017 INFINITI Q50 AS A CERTIFIED DEALER OWNED VEHICLE WITH 4710 MILES ON IT FROM AIRPORT INFINITI ON 12/31/2018. SINCE TAKING POSSESSION OF THE CAR, I HAVE HAD THREE SEPARATE INSTANCES WHERE MY CAR LOST POWER DURING ACCELERATION, IN WHICH ONE OF THE INSTANCES NEARLY CAUSED ME TO BE HIT BY A SEMI-TRUCK WHEN CROSSING A DIVIDED HIGHWAY. I HAVE PROVIDED VIDEOS TO THE MANUFACTURE BUT THEY HAVE REFUSED TO TAKE ACTION BECAUSE THE VEHICLE DOES NOT SET ANY DTC CODES. WHEN THIS CONDITION HAPPENS MY 3.0T Q50 ACCELERATES EXTREMELY SLOW EVEN WITH 100% THROTTLE. THE NET RESULT IS THAT WHEN I INTEND TO CROSS A DIVIDED HIGHWAY, I EXPERIENCE A 1-1.5 SECOND DELAY FROM THE TIME I PUSH DOWN THE ACCELERATOR TO WHEN THE CAR BEGINS TO MOVE, THEN THE ACCELERATION FROM 0-15MPH CAN TAKE UPWARDS OF 5-6 SECONDS. THE RESULTING FEELING IS A CAR THAT ROLLS INTO A DANGEROUS INTERSECTION AND EXHIBITS STALL LIKE CONDITIONS. ONLY ONCE DID THE CAR SET DTC CODES DURING THIS INSTANCE. THE CODES SET WERE B130D, C1A16 AND PO340. THESE CODES SET THE FIRST INSTANCE, BUT HAVE NOT SET DURING THE PAST TWO OCCURRENCES OF THE SAME ACCELERATION ISSUE. THESE INSTANCES ARE COMPLETELY RANDOM WHICH MAKE THEM EXTREMELY DANGEROUS. FOR INSTANCE, THE CAR WILL BE DRIVING COMPLETELY NORMAL, I WILL STOP AND AN INTERSECTION AND THEN WHEN I GO TO TURN OUT INTO THE INTERSECTION, I GO INTO THIS STALL CONDITION WITHOUT WARNING. THE DEALERSHIP HAS HAD THE CAR 4 SEPARATE TIMES AND EACH TIME THEY HAVE REFUSED TO FIX ANYTHING ON THE CAR, DESPITE HAVING A VIDEO OF THE OCCURRENCE AND CONFIRMING THAT THE ACCELERATION WAS ENTIRELY ABNORMAL. I HAVE NO CHOICE BUT TO DRIVE THIS CAR IF INFINITI REFUSES TO FIX IT, BUT FEEL IT IS LIKELY THAT IT WILL CAUSE INJURY OR DEATH TO ME AND MY FAMILY IF I DRIVE IT. I HAVE ATTACHED A SUMMARY OF THE DAILY LOG I HAVE BEEN KEEPING SINCE I PURCHASES THE CAR ON 12/31/2018.

I PURCHASED MY 2017 INFINITI Q50 ON OCTOBER 06 2018 FROM CARVANA LLC. THE VEHICLE WAS USED AND HAD APPROXIMATELY 38K ON THE ODOMETER. WITHIN 2 WEEKS OF OWNING THE VEHICLE THE REAR BRAKES PADS NEED TO BE REPLACED AND THE ROTORS NEEDED TO BE RESURFACED. THIS WAS EXPECTED DUE TO THE HIGH MILEAGE ON A 1 YEAR OLD VEHICLE. THEN ON JANUARY 11TH 2019 I TOOK MY 2017 INFINITI Q50 IN FOR ITS OIL CHANGE AT 43,000 MILES WITH GLENDALE INFINITI IN GLENDALE CALIFORNIA. WHEN THE SERVICE WAS COMPLETED THE SERVICE ADVISOR HAD NOTIFIED ME THAT MY REAR BRAKE PADS WHERE AT 4/32'S AND WOULD NEED TO BE REPLACED WITHIN 6,000 MILES. I HAD THE BRAKE PADS REPLACED WITH THE FACTORY RECOMMENDED BRAKE PADS AT FIRESTONE IN ALHAMBRA ON 6 OCTOBER AS STATED ABOVE. I DID TAKE THE CAR BACK TO FIRESTONE IN ALHAMBRA CA FOR SQUEALING BRAKES MID DECEMBER 2018 AND IT WAS ALSO DISCOVERED THAT THE FRONT BRAKE PADS NEEDED TO BE REPLACED ALONG WITH THE ROTORS NEEDING TO BE RESURFACED. THE REAR BRAKES NOW SQUEAL AND WILL NEED REPLACEMENT FOR THE 2ND TIME IN LESS THAN 3 MONTHS. MY CAR IS USED TO DROP MY SON OFF AT DAYCARE AND MY WIFE AT WORK AND THEN TO PICK THEM BOTH UP AND SOME OCCASIONAL TRAVEL AND WORK FOR MY PART TIME JOB AS A RIDESHARE EMPLOYEE WHICH TOTAL 859 MILES IN DECEMBER. I HAVE SEEN COMPLAINTS FROM OTHER OWNERS ABOUT HAVING THE REAR BRAKE PADS WEAR PREMATURELY. I ASK ED THE SERVICE ADVISOR WITH GLENDALE INFINITI ABOUT IT AND HE SIMPLY STATED IT IS DUE TO HARSH BRAKING. I RESPONDED WITH IS THAT SO BECAUSE THEY WHERE REPLACED WITH FACTORY BRAKE PADS IN OCTOBER 2018. SINCE THE FIND THE SQUEALING IS INTERMITTENT WHEN COMING TO A STOP AND MY STOPPING DISTANCE HAS INCREASED EVEN AT LOW SPEEDS ON CITY STREETS.

TL* THE CONTACT OWNS A 2017 INFINITI Q50. WHILE MAKING A LEFT TURN AT 10 MPH, THE VEHICLE SUDDENLY ACCELERATED. THE BRAKE PEDAL WAS DEPRESSED, BUT THE VEHICLE FAILED TO STOP. AS A RESULT, THE CONTACT'S VEHICLE REAR ENDED ANOTHER VEHICLE. THE AIR BAGS DID NOT DEPLOY. THE CONTACT SUSTAINED NECK INJURIES THAT REQUIRED MEDICAL ATTENTION. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO THE DEALER (INFINITI OF MANHASSET, 1225 NORTHERN BLVD, MANHASSET, NY 11030) TO HAVE THE BRAKES DIAGNOSED, BUT NO REPAIRS WERE PERFORMED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND REQUESTED A REPORT OF THE VEHICLE'S DATA RECORDER. THE CONTACT WAS AWAITING A RESPONSE FROM THE MANUFACTURER REGARDING THE DATA RECORDER REPORT. THE FAILURE MILEAGE WAS 8,000. *TT