Infiniti Q50 owners have reported 47 vehicle speed control related problems since 1996. Table 1 shows the 4 most common vehicle speed control problems. The number one most common problem is related to the vehicle's vehicle speed control (40 problems). The second most common problem is related to the vehicle's speed sensor (4 problems). For details of each of the problem category, use the links in the table.
| Problem Category | Number of Problems |
|---|---|
| Vehicle Speed Control problems | |
| Speed Sensor problems | |
| Car Accelerates On Its Own problems | |
| Cruise Control problems |
In August 2026, while driving, the vehicle suddenly lost acceleration and engine power and would only travel at a very slow speed. The check engine light came on. The driver had to safely stop, turn the engine off, and restart it. Read details...
Output speed sensor on 2016 Infiniti Q50t - took vehicle in for oil and filter change 2 days ago. I drove the car about 40 miles, without incident. Went back to same place for state inspection yesterday. I drove about 2 miles from the inspection place and park in shopping lot. Read details...
Unintended acceleration. Pulling into a parking space in a shopping center parking lot, after going over a speed bump and making a left hand turn into the spot the car accelerated and would not stop. Pushing on the brakes did not work. Read details...
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 Read details...