2017 Infiniti Q50 Brakes Problems

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.

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.