There are 2 stored owner reports matching the speed control & cruise leading-label group for the 2017 Toyota Prius Prime in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)In the 2017 Prius Prime when the car switches from Electric power to gas the car frequently fails to allow you to accelerate. It is like you are stuck in neutral on the freeway, taking your foot off of the acceleration pedal and pushing it down doesn't always fix the issue. The accelerator foot pedal can be completely down to the floorboard as you are losing speed. The safety issue is that you are losing speed, and on the freeway and the car doesn't recover losing some control. I have taken the car to the Toyota delearship and when taken in that say it is a software update, but this continues to happen. There is no real notification when this will occur as the battery milage switchover is often misreported by the car.
I WAS SLOWLY ( < 5MPH) APPROACHING A STOPLIGHT AT A BUSY INTERSECTION IN A 25 MPH ZONE ON A 4 LANE STREET THERE WERE 2 VEHICLES AHEAD OF ME. EVERYTHING SEEMED FINE UNTIL MY VEHICLE SUDDENLY ACCELERATED RAPIDLY AND I WAS UNABLE TO STOP IT. THE PATH OF LEAST RESISTANCE WAS TO DRIVE IT INTO THE CAR IN FRONT OF ME AND NOT TO SWERVE. ONCE I HAD STOPPED AND CAUGHT MY BREATH, I PUT THE CAR INTO REVERSE TO BACK AWAY FROM THE CAR I HAD HIT, AND ONCE AGAIN THE CAR RAPIDLY ACCELERATED BACKWARD INTO THE CAR BEHIND ME. UNTIL THIS TIME I HAVE HAD ABSOLUTELY NO PROBLEMS WITH THE VEHICLE. IT ONLY HAS BEEN DRIVEN 14,500 MILES.
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.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 29, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.