2015 Infiniti Q50: sudden loss of power

5 of the 126 complaints about the 2015 Infiniti Q50 describe sudden loss of power.

owner complaints: 5
of this car's complaints: 4%
recalls: 0

Is there a fix? 17 service bulletins cover this area of the car. See below

Sudden loss of power by model year

2021
1
2019
3
2018
2
2017
6
2016
2
2015
5
2014
4

What owners say

Filed Sep 26, 2025 · Steering · CO

Was making a left turn when the steering stopped working and the motor lost power, the adaptive steering quit working after approximately 15 mins. I started the car and it was working. Went a half mile made a right turn and it went out again. Shut off the motor tried to start it and could not. 20 mins later it started and has been working since. Dealer couldn't find the problem and wouldn't fix it, they also said that their were no recalls but I know that is not true. Infiniti had a law suit brought against them for the adaptive steering issue. If they fixed it why doesn't it work right.

Filed Sep 12, 2025 · Steering · CO

Unknown. Started to make left turn steering made loud banging noise then lost all power. Stepped on gas pedal would not go lost steering control and coasted to a stop. Adaptive steering went out. Almost got hit by on coming traffic.

Filed Mar 24, 2024 · Steering · PA

Car starts up and a little like the battery is having issues with loss of power. The dash board then shows multiple warning lights such as a batter, steering, and stability control. I turn the car back off and then back on and the steering light stayed on. The steering wheel is stuck but the car still moves forward and backwards with very stiff steering. In the past I had the issue checked by getting the steering wheel fluid exchanged and had multiple alignments since . The car would show signs of stiff steering when parking it will get wonky and like won’t move and bumping into a curb with the rear wheels will trigger it every once in a while. The steering has been an ongoing issue for the last year and I can’t figure out what it is but I did find out by Google searching that there was a recall on other models like mine with powering steering assist .

Filed May 26, 2021 · Transmission · FL

On 5-25-2021 while merging into traffic on busy I-75. My 2015 Infiniti Q50 did not change into a higher gear as it should have causing the vehicle to not accelerate and lose power then the check engine light came on a few seconds after failure.This failure of the vehicles drive train placed my wife’s life and my life in extreme danger in which we were not able to accelerate with the flow of traffic and was nearly ran over by several semi tractor trucks. The vehicle is in the repair shop for the transmission valve body failure and replacement. I’ve looked this issue up online where numerous owners of this type vehicle have complained and described this as a common problem with these vehicles.

Filed Dec 12, 2017 · Electrical · 40,000 miles · CA · crash · 1 injury

Tl* the contact owns a 2015 infiniti q50. While driving approximately 40 MPH, the vehicle lost power and crashed into a guardrail. There were no warning indicators illuminated before the failure. The vehicle was towed to an independent mechanic. The contact sustained minor injuries, which did not require medical attention. A police report was not filed. The vehicle was not diagnosed or repaired. Infiniti of riverside (3040 adams st, riverside, ca 92504 (951) 373-5200) was notified. The manufacturer was not notified of the failure. The VIN was unknown. The failure mileage was 40,000.