There are 1 stored owner reports matching the powertrain & transmission leading-label group for the 2015 Scion xB 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)WHILE DRIVING ON A LIMITED ACCESS HIGHWAY AT HIGHWAY SPEED, THE PASSENGER BUMPED THE TRANSMISSION SHIFT CONTROL WITH HIS LEG, MOVING THE VEHICLE FROM AUTOMATIC MODE INTO MANUAL MODE, CAUSING THE VEHICLE TO SHIFT INTO 3RD GEAR, AND CAUSING A CORRESPONDING ABRUPT SLOWDOWN OF THE VEHICLE WITHOUT ACTUATION OF THE BRAKE LIGHTS TO WARN FOLLOWING VEHICLE OF THE SLOWDOWN. A FOLLOWING VEHICLE HAD TO BRAKE HARD TO AVOID A COLLISION WITH MY SCION XB, WHILE I CORRECTED THE SITUATION BY SHIFTING THE TRANSMISSION CONTROL BACK INTO AUTOMATIC MODE. I BELIEVE THERE IS AN INSUFFICIENT DETENTE MECHANISM TO RETAIN THE VEHICLE IN AUTOMATIC TRANSMISSION MODE, AND THAT ACCIDENTAL SHIFTS INTO MANUAL MODE AT HIGHWAY SPEEDS ARE NOT ADEQUATELY PREVENTED. AN UNINTENDED DOWNSHIFT CAUSED BY A PASSENGER COULD RESULT IN AN ACCIDENT CAUSING GREAT INJURY IF IT WERE TO OCCUR IN HEAVY TRAFFIC AT HIGHWAY SPEEDS. THE VEHICLE COULD ALSO BE DAMAGED BY THESE UNINTENDED/UNCOMMANDED DOWNSHIFTS, CAUSING A CATASTROPHIC FAILURE OF THE VEHICLE DURING SUBSEQUENT EXCURSIONS.
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 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.