There are 2 stored owner reports matching the brakes leading-label group for the 2018 Toyota Prius 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)The contact owns a 2018 Toyota Prius. The contact stated that while in bumper-to-bumper traffic, the vehicle suddenly accelerated. The brake pedal was applied but failed to respond. The driver crashed into the front passenger side of the Lexus. The vehicle continuously moved forward. The contact was eventually able to pull over safely. The pre-collision malfunction warning light illuminated. The brake malfunction light was flashing. The air bags did not deploy. There was no reported fire or injury. A police report was filed. The vehicle was taken to the local dealer, who could not determine the failure. The vehicle was not diagnosed or repaired. The vehicle was then towed to an autobody center where it remained. The manufacturer was contacted, but no additional assistance was provided. The approximate failure mileage was 39,000.
THIS IS A BRAND NEW CAR I PURCHASED. THERE IS A HIGH-PITCHED NOISE THAT THE BRAKE PEDAL MAKES WHEN YOU DEPRESS THE BRAKE PEDAL. I THOUGHT THIS WAS PART OF THE BEEPS THE CAR MAKES, BUT IT'S NOT. THE BRAKE BOOSTER WAS REPLACED, BUT THE BRAKE PEDAL CONTINUES TO MAKE A HIGH-PITCHED CHIRPING NOISE. I RETURNED TO TOYOTA SERVICE TO HAVE IT CHECKED OUT, BUT THEY SAID THAT THIS IS A NORMAL SOUND THAT OTHER PRIUSES MAKE. THIS CONCERNS ME THAT THE BRAKES ARE DEFECTIVE SINCE I'VE NEVER HEARD OF BRAKES THAT SOUND LIKE THIS.
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.