There are 5 owner-reported speed control & cruise complaints for the 2014 Infiniti Q50in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Speed sensor Is faulty on infiniti q50...had it replaced 9/28/22 for 3700.00 now on 3/03/23 I was told I need to replace the transmission for 7300.00 I research speed sensor it seem 2014 to 2015 infiniti q50 are having issues with speed sensor. I have read multiple complaints about this issue. It should be a recall on the speed sensor. Infiniti/Nissan know it I will never purchase a another Infiniti/Nissan vehicle again.
I brought a lemon from premier auto kc out in Kansas city, Kansas! I was sold a lemon and have had major problems with the car since
The contact owns a 2014 Infiniti Q50. The contact stated while driving approximately 45 MPH, the vehicle independently decelerated to 10 MPH. The contact depressed the accelerator and observed that the RPMS was elevated however, the vehicle failed to respond. The contact pulled off the road into a parking lot and turned off the vehicle. The contact stated that when she restarted the vehicle, the vehicle jerked while driving and failed to exceed 20 MPH. The contact stated there was no warning light illuminated. The vehicle was taken to the local dealer where it was diagnosed and determined that the valve body assembly needed to be replaced. The vehicle had not been repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 133,000.
MY POWER STEERING BELT SNAPPED OFF. PRIOR TO THAT, MY BRAKE PEDAL WAS LOOSE ENOUGH TO MOVE IT UP AND DOWN ROUGHLY A 1/4 OF AN INCH WITH MY FOOT. THE ONLY WAY TO ENGAGE THE CRUISE CONTROL WAS TO HOLD THE BRAKE PEDAL UP WITH MY FOOT, THEN IN ORDER TO KEEP THE CRUISE CONTROL ENGAGED WAS TO KEEP HOLDING THE BRAKE PEDAL UP WITH MY FOOT BECAUSE IT WOULD SENSE THAT THE DRIVER SLIGHTLY TAPPED THE BRAKE PEDAL TO DISENGAGE IT IF I STOPPED HOLDING IT UP MANUALLY. I HAD TO HAVE THE BRAKE PEDAL BOLT TIGHTENED. IT HAS HAPPENED AGAIN AND I CAN'T REACH THE BOLT, SO I HAVE TO PAY TO HAVE IT FIXED AGAIN ALONG WITH THE OTHER ISSUES. THE OTHER ISSUE IS MY A/C BLEND DOOR IS NOT OPERATING, WHICH IS CAUSING THE TWO DRIVER SIDE A/C VENTS TO BLOW WARM AIR OUT OF THEM WHILE EVER OTHER VENT BLOWS ICE COLD . NOT FUN IN THESE INCREDIBLY HOT AND HUMID GEORGIA SUMMERS.
THIS VEHICLE HAS AN ELECTRONIC BRAKING SYSTEM THAT HAS MADE THIS CAR HANDLE ERRATICALLY AND EXTREMELY UNSAFE IN TRAFFIC SITUATIONS. WHILE TRAVELING AT SPEED IF TRAFFIC IN FRONT OF YOU HAPPENS TO BRAKE OR SWERVE IN FRONT OF YOU THIS CAR WILL BRAKE UNCONTROLLABLY WITHOUT NOTICE MAKING IT NEARLY IMPOSSIBLE TO AVOID A COLLISION OR CHANGE LANES TO MANEUVER AROUND ON OBSTACLE OR CAR. MYSELF AND MY WIFE ARE VERY SCARED TO DRIVE THIS CAR AND IN FREEWAY TRAFFIC YOU CANNOT SAFELY CHANGE LANES. WE FEEL IT IS ONLY A MATTER OF TIME BEFORE THIS POORLY DESIGNED SYSTEM WHICH CANNOT BE DISABLED WILL RESULT IN COLLISIONS OR DEATH. THIS HAS HAPPENED MORE THAN A DOZEN TIMES SINCE PURCHASE IN APRIL 2014. WE NO LONGER FEEL SAFE DRIVING THIS CAR.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026