There are 1 stored owner reports matching the brakes leading-label group for the 2018 Toyota Sienna 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 1 of 1 matching reports.
Open the full vehicle complaint log (all categories)LIGHT, MODERATE TO TOO MUCH VIBRATION ON THE FRONT BRAKE WHEN DRIVING DOWNHILL. I WAS DRIVING DOWNHILL AND I FELT MODERATE VIBRATION ON THE FRONT BRAKE. I WAS SO SCARED THAT I HAVE TO RELEASE THE BRAKE HOPING TO STOP THE VIBRATION. ON THE WAY BACK HOME, I HAVE TO DRIVE ANOTHER DOWNHILL AND THIS TIME, I FELT TOO MUCH VIBRATION ON THE FRONT BRAKE WHEN I APPLIED THE BRAKE. THE VIBRATION WAS TOO MUCH THAT EVEN THE HOOD, I FEEL LIKE IT STARTS VIBRATING AS WELL. WHEN DRIVING FLAT, THE VIBRATION WILL FADE AWAY OR THERE IS NO VIBRATION AT ALL.
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.