Infiniti QX50 Complaints

283 consumer complaints on file.

#11648896March 18, 2025
POWER TRAIN, ENGINE
My qx50 is currently back in the shop. So far I’ve spent about $12,000 on engine and transmission repairs and the NHTSA doesn’t seem to be doing anything about it. Now it needs a new “ignition coil” for another $1,000. I’m just at a loss for words!! I’m attaching the “Review of services” that was conducted earlier this month, when my Infiniti was in the shop and the diagnostic codes that came up when I had to have the vehicle towed there, less than a week later.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11646423March 5, 2025
ENGINE, POWER TRAIN
On February 28, 2025, while driving home form work in my 2019 Infiniti QX50, on a 4 lane highway, I slowed to turn across 2 lanes of oncoming traffic to a side county road. I made it across the highway and the vehicle immediately lost all power. I coasted to a stop on the side of the road. I tried to restart the car and it would not start. I called for a tow and had it taken to the nearest repair shop. The vehicle was inspected and I was informed the engine was blown and would need to be replaced. Prior to this happening, there were no sounds, indicators or warnings of any possible issues. I have owned the vehicle since February 2020. It has always been maintained on schedule (records available). In fact, the vehicle was thoroughly inspected by Infiniti in October of 2024, when I had to have the rear lift gate motor replaced. I was told everything looked good, timing belt had no wear, there were no leaks or concerns. The only recommended services at that time were to change the brake fluid and antifreeze. The vehicle is available for any and all requested inspection.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11644494February 24, 2025
ENGINE
My Infiniti started making a slight ticking noise. The next day, the car abruptly stalled out while going down the highway causing the vehicle to loose speed and experience engine failure. Luckily, I was able to steer the vehicle to a more manageable location out of traffic. I had lost engine power and steering. After a certified mechanics diagnosis, the engine was declared blown. The bearings and rods have failed and the engine is no longer in repairable condition. The vehicle was serviced per manufacture regularly and there had been no signs of engine failure to that date.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11643569February 18, 2025
ENGINE
Engine destroyed itself upon acceleration on highway. Variable Compression system malfunctioned, metal shavings found in oil, and engine no longer starts. Check engine light flashed after acceleration, and then engine lost all power. Car coasted to a stop as the engine couldn't make power.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11642405February 13, 2025
AIR BAGS
On December 24, 2024 I was in a car accident where my car did make impact twice after spinning out of control due to black ice. The first impact occurred hitting a car then the final impact occurred when the car was flung into the metal barricade after spinning. The air bags did NOT deploy during this accident and I was very concerned for my safety and my life.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11642329February 12, 2025
ENGINE
Bought the car from Infiniti and drove it a month,got my first oil change and that sam day my engine lock up first I heard the lifters and then the car shut down as I was trying to pull over ,I was 2,000 miles over my warranty
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11634479January 6, 2025
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
The contact owns a 2020 Infinity QX50. The contact stated that while driving on the highway at 70 MPH, the vehicle started making an abnormal sound, and the vehicle stopped unintendedly. The contact was grateful that she was not involved in an accident because there was traffic nearby. The contact was able to continue driving the vehicle. No warning lights were illuminated. The vehicle was taken to a local dealer to be diagnosed; however, a cause for the failure was not found. Additionally, the contact stated that the instrument indicated that there was a vehicle nearby erroneously. The contact considered that the failure was caused by a glitch. The manufacturer was not notified of the failure. The approximate failure mileage was 30,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11633917January 3, 2025
ENGINE
On January 1, 2025 at about 10:30pm, while driving at about 40 miles per hour the engine made some knocking noises and then suddenly lost power, forcing the car to be pulled over to the side of a dangerous road. When I opened the hood of the car there was a small amount of smoke. There was no advanced warning that there was a problem with the engine, it just stopped running causing a dangerous situation. I had the car towed to Infiniti of Massapequa and was told the next day that the car needed a new engine. I was told by the dealer that there was metal in the oil and it appears the main bearing broke. The car is only about 6 years old with approximately 26,200 miles and has been extremely well maintained with the dealer, including scheduled oil changes with full synthetic oil. I am trying to get Infiniti to cover the full engine replacement cost since the warranty expired about two months ago. However, they still want to charge me $7,560 plus tax. The Infiniti service report is still pending the repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11631446December 18, 2024
ELECTRICAL SYSTEM, FORWARD COLLISION AVOIDANCE: WARNINGS
Multiple electronic and sensor issues with the display screens and infotainment center. Time/time zone change from 12-hour format to military time off and on sometimes multiple times a day. Dash board routinely goes black and not displaying any information. HUD proximity alerts continually go off/flashing when no vehicles are around, tagging the same areas on a specific street that was empty. The sensor system engages the braking system after a faulty proximity alert or a vehicle is outside the normal range. Navigation system map blacking out Inability to disconnect Bluetooth calls using the steering wheel end button and the end button on the screen. The infotainment screen would not respond to menu button for the audio and climate control nor could you access it through the touchscreen menu. The radio would stop working randomly. I had to go to the dealership to get this corrected it would not restart on its own even if it was left overnight. The audio button also would not work. The car would not recognize the profile connected to the key fob routinely. After service, the car took over 8 minutes to lead the infotainment system. The blind spot warning would not function properly continuously. The car was taken into the dealership multiple times, it was assessed by "engineers" 3 times, and it had a total of 3 infotainment systems in this vehicle with 2 replacements since leasing the vehicle. These issues continue to remain and there seems to be nothing that Infiniti can or will do to fix these issues permanently.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11629513December 8, 2024
SEATS
Driver’s seat will not move forward. Driver cannot reach the pedals. This has been an ongoing/intermitten problem. While the car was under warranty, Infiniti of Ft Myers, FL attempted to fix the problem and eventually replaced the components. The problem was fixed until last spring. When I reported the problem to Nissan last spring, they told me there was nothing they could do. I explained it was a safety issue. They didn’t care. The following day, the seat moved forward on its own so I didn’t pursue it. Yesterday, it happened again and today it did not reset itself. I cannot safely drive my car. In researching this issue, I’ve read that others have had the same issue and Nissan refuses to acknowledge or take responsibility for the problem. What if I were away from home and this happened? How would I safely drive my car? This happened a few years ago and I had to get to a cancer radiation appointment. I drove with a pillow and used cruise control as much as possible. It was a seriously dangerous driving experience, but I had no choice. I would appreciate any assistance your agency can provide.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628585December 3, 2024
ELECTRICAL SYSTEM, ENGINE, POWER TRAIN
Turbo, Rear-Coupler, Engine, Actuator Car was squealing and I was told that the serpentine belt needed to be replaced. Replaced this. Car still squealing and took it back. They replaced the belt, again.. Still squealing, now I am told its the tensioner that needs to be replaced but only Infiniti can do this (belt done at Firestone). At Infiniti - they look at the car and the tensioner is fine. But my turbo is blown. How? So, they replace the turbo and then say the rear coupler needs to be replaced. Repairs done and Infiniti said all fluids are good, everything is great. However, I might see slight smoke and a burning smell for 100-150 miles as theres a thin layer of oil on the turbo that will burn off. Oil change isnt due for 5k miles and I checked before my short road trip - all is good. Past the 100-150 miles and the car is SMOKING and SMELLS OF BURNING... Call infiniti, this is normal it will go away. Check fluids again, as no lights on the dashboard and oil is fine. Come back to get my car, check the ground as I always do and no oil/fluid and proceed home. 10 mins from my house the car WREAKS of burning smell, will not accelerate, no dashboard lights. So, I sit there and let it cool down - check again everything looks good. Try again, car will not go. Fluids look fine - oil, no spikes in temp, and no lights. Next day, no fluids under the car. Car accelerates but lunges me then stops going. Car smells bad, smoke.. go to check the fluids and NO OIL in the car out of no where. Infiniti tows it and it sounded like it was going to blow up. Also, a tink tink tink sound started out of no where. This is dangerous as the vehicle could had started on fire. I still dont know what is going on as Inf. has the car right now. This is a major safety hazard as I found a LOT of reports on this happening to others with this specific model and year. I had NO issues like this until Inf replaced the turbo.. NONE!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11627097November 24, 2024
ELECTRICAL SYSTEM, ENGINE, STRUCTURE:BODY
Engine shut off while driving 45mph with no prior warning
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11625841November 18, 2024
ENGINE
The engine stopped working. Allowing me to go no faster than 15 miles an hour. The safety issue is you can no longer drive at the speed that you need to drive. especially if you’re on the highway. The problem has been addressed by a dealer. I needed a whole new engine $13,000. The car at 97,000 miles on it. Was well taken care of. No warning signs prior also did not come up on my display Apparently, there are many other 2019 Infiniti QX 50’s that have this issue
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11621911October 25, 2024
ENGINE, POWER TRAIN
Without any warning or indicator light on the dash, the vehicle lost power when pulling out of our driveway - we live on a main road and were very lucky not to be hit by upcoming traffic. The car went into limp mode and would not accelerate past 20mph. We have been fighting with Infiniti for the last three weeks as no one can find the problem and they finally said a new engine was needed. There is on 35,000 miles on this car and we had to fight to have this replacement covered under warranty. Now that parts are back ordered and we are not receiving any help. We are three weeks without a vehicle and have no loaner vehicle. No one at Infiniti can give a timeframe for the resolution of this issue, what caused this issue and we are now very fearful that this will happen again - even with an engine replacement. This was very scary for our family and we are amazed that there was no indicator light or warning. The car didn't make any noises and was running great and then all of a sudden it would not go. Very alarming to say the least!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11620722October 18, 2024
VEHICLE SPEED CONTROL, UNKNOWN OR OTHER
Engine light is on - transmission output speed sensor. Vehicle was inspect by Pep Boys # 208 My vehicle don't want to pick up speed. I don't know what caused the problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11616927September 27, 2024
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
See attached document for complaint.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11616162September 24, 2024
POWER TRAIN
The contact owns a 2015 Infiniti QX50. The contact stated while driving at an undisclosed speed, there was an abnormal sound coming from underneath the vehicle. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The vehicle was then taken to an independent mechanic, who confirmed the diagnosis. The vehicle was repaired, but the failure reoccurred. The manufacturer was not notified of the failure. The failure mileage was 46,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11601999July 14, 2024
ELECTRICAL SYSTEM
All vehicle doors and sometimes lift gate fail to open either by key fob or by indoor automatic door locks. Have to use Valet key to open driver door (alarm does not sound), then enter vehicle and manually unlock or lock desired door. Safety issue because kids can automatically exit or any individual can enter the vehicle unannounced while stopped. Neighbor has exact same vehicle year and model and is experiencing the same issues.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11602003July 14, 2024
VEHICLE SPEED CONTROL, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING, FORWARD COLLISION AVOIDANCE: WARNINGS
1. COLLISION WARNING SENSOR ACTIVATED WHILE DRIVING IN THE #1 LANE( CLOSEST TO THE CEMENT HIGHWAY DIVIDERS) AND AGGRESIVELY BRAKED AND SLOWED WHILE DIVING AT 77 MPH. NOT SAFE!! 2. EVEN THOU I PURPOSELY TURN THE RADIO "OFF" WHEN EXITING MY CAR, UPON ENTERING MY CAR AFTER A SHORT DURATION OF TIME, THE RADIO TURNS "ON" WITHOUT ANY ASSISTANCE BY ME....VERY FRUSTRATING!! VEHICLE HAS BEEN INSPECTED BY THE LOCAL INFINITI DEALERSHIP....THEY'RE CLUELESS AND OF NO ASSISTANCE OR HELP.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11598791July 4, 2024
VEHICLE SPEED CONTROL
I was driving and came to a red light behind other cars. I was completely stopped with brakes applied and vehicle suddenly lurched forward, RPM’s reved up over 3,000 without me accelerating. I was about two blocks from home and was able to make it by slowly driving and jerking all the way. Mechanic codes were 720 output speed sensor. Very alarming situation! I could have easily hit the car in front of me if I would have been any closer, or worst yet a pedestrian! Appears to be critical safety issue and something that may need to be recalled.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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