There are 2 owner-reported speed control & cruise complaints for the 2004 Scion xBin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
MY SON WAS DRIVING OUR 2004 SCION XB WHEN THE ACCELERATOR GOT STUCK. HE TRIED THE BRAKES BUT COULD NOT STOP OR EVEN SLOW THE CAR DOWN. HE REAR-ENDED ANOTHER CAR AND THE ENGINE WAS STILL RACING. THE ONLY THING THAT STOPPED THE ACCELERATION WAS TURNING THE IGNITION OFF. THIS MORNING WHEN THE TOW TRUCK OPERATOR STARTED THE CAR, THE ENGINE IMMEDIATELY BEGAN RACING, AND HE QUICKLY SHUT IF OFF. *TR
I PURCHASED A 2004 SCION XB FOR MY DAUGHTER IN JUNE 2009. SHE CAME HOME FROM WORK LAST NIGHT (JULY 17, 2010) AND WHEN SHE STOPPED HER SCION IN THE DRIVEWAY, WITH HER FOOT ON THE BRAKE (JUST BEFORE PUTTING IT IN PARK), THE CAR ACCELERATED. SHE INSTINCTLY PUT THE CAR IN NEUTRAL AND TURNED THE IGNITION OFF. WHEN I WENT OUTSIDE TO CHECK IT, THE CAR WAS STILL IDLED UP WHEN I STARTED THE VEHICLE. *TR
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.
Data synced from NHTSA on Apr 25, 2026