2015 Infiniti Q70 problems

Filed Nov 8, 2026 · Driver assistance, Electrical · CT

A known manufacturing defect is causing my sunroof drain to fail, dumping water into the cabin and flooding the main electrical wiring harnesses under the driver-side floorboard and door pillar. This ongoing water leak has corrupted my vehicle's electrical system, causing multiple erratic sensor codes over the past few weeks. In the past few weeks I have received engine coolant code P0128 and transmission code P0720. Recently, while driving, this short circuit caused my Forward Collision Warning light to come on, immediately followed by a sudden loss of vehicle acceleration. My car forced itself into a 3rd-gear 'limp mode.' This unexpected loss of power occurred in active traffic, creating an immediate risk of a rear-end collision.

Filed Aug 8, 2025 · Transmission · FL

Driving on the highway my car suddenly lost power and has since been stuck in first or second gear after further research online it seems that a ton of Nissan/Infiniti owners both cars and suv have or had the same problem between as early as 24k-100k miles all owners I have read online has the same check engine light on with codes P0500/P0720

Filed Aug 19, 2023 · Airbags · NY · 1 injury

Driver side airbag deployed as I was turning the corner leaving me with no visual of pedestrians. The deployment resulted in lacerations on my forearm and a knot on my head with a busted lip. My vehicle is technically not drivable because my seatbelts are locked. I am also afraid of driving my vehicle due to the other airbags deploying on my family out of no where. There were no prior lights or warnings to this incident.

Filed Jun 4, 2022 · Electrical, Engine · AZ

During highway driving on May of 2022, the vehicle displayed an Intelligent Key Not Detected error while driving on cruise control. The accelerator was no longer responsive as the vehicle decelerated. The warning lights, infotainment center and A/C were still operational. Vehicle was maneuvered off the highway , but would not start up after power down. Vehicle battery was replaced, and the same error occurred 2 weeks later while the car was idled. Error reported to dealership with remedy of ECM reprogramming following guidelines of BULLETIN ITB13-054D.

Filed Apr 1, 2022 · Transmission · 124,931 miles · FL

The contact owns a 2015 Infiniti Q70. The contact stated while making a left turn, the vehicle stalled. The contact stated that an unknown yellow warning light was illuminated. The contact stated that he was able to restart the vehicle and drove to his residence at 7 MPH. The contact towed the vehicle to the local dealer, where it was diagnosed with needing the transmission valve assembly to be replaced. The vehicle was repaired. The manufacturer had been informed of the failure. The failure mileage was 124,931.

Filed Jul 7, 2021 · Steering · 40,000 miles · MD

The contact owns a 2015 Infiniti Q70. The contact stated while reversing into a parking spot and turning the steering wheel, she heard an abnormal sound and the steering wheel continued to turn in a full circle. The contact stated no warning light was illuminated. The contact took the vehicle to the local dealer however, the mechanic was unable to duplicate the failure. The manufacturer had not been informed of the failure. The failure mileage was approximately 40,000. The VIN was not available.

Filed Jun 15, 2021 · Transmission · 72,000 miles · PA

The contact owns a 2015 Infiniti Q70. The contact stated that the vehicle failed to accelerate above 40 mph. The vehicle was taken to the dealer and diagnosed that the output sensor and transmission control module (TCM) had failed. The vehicle was not repaired and remained at the dealer since the TCM part was on back-order. The manufacturer was made aware of the failure. The contact was informed that the diagnostic report would be sent once completed. The failure mileage was 72,000.

Filed Jan 11, 2021 · Acceleration · GA

Car will stop accelerating with no warnings then will start back move when you let the sit for and hour. Engine light will not light up when the incident happened so the problem can not be diagnosed until the engine come on. However when the engine light does come you can take to dealership and they will tell that the transmission speed sensors need to be replaced in which the sensor is located inside the transmission and in conjunction to that it is recommended that the valve body should be replaced also. This has been a problem with a lot of the infiniti's with years ranging from 2014-2019 with 3.7 liter engine. This problem should be resolved because the car can suddenly stop move at high speeds and cause and accident. Please take a good look at this recall aamco transmission have had hundreds of infiniti's with the same problem and they can not repair so they will send you to the dealership for repairs in which it will cost the consumer 3,000 plus to fix the problem and they will recommend that you should get the transmission replaced instead of repairing it and most of the vehicles are having this problem with low mileage. Scan codes p0500, p0720, p1574

Filed Mar 9, 2017 · Acceleration · 23,000 miles · NY · crash

Tl* the contact owns a 2015 infiniti q70. While operating the vehicle in the driveway, it surged forward and crashed into the parking barrier in the neighbor's yard. The failure occurred without warning the failure occurred twice. A police report was not filed. The vehicle was towed to the dealer. The front end and undercarriage of the vehicle experienced severe damage. The vehicle was repaired. The manufacturer was notified of the failure. There were no injuries. The failure mileage was approximately 23,000. Updated 05/16/17*lj

Filed Sep 20, 2015 · Transmission · 1,100 miles · CT

This car vibrates when traveling at speeds of 40mph and 65mph. Significant vibration can be felt in the center console and armrest. My car has a especially severe vibration around 40 MPH when driving up a hill and the transmission is set to eco mode. Vibration can be felt in the steering wheel and the driver and passenger front seat. Tires were road force rebalanced by the dealer, but the problem persists. Since it is at only certain speeds, the cause of the problem has not been identified by the dealer.