There are 7 owner-reported speed control & cruise complaints for the 2003 Toyota Siennain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2003 TOYOTA SIENNA. THE CONTACT STATED THAT WHILE SHIFTING INTO REVERSE, THE VEHICLE INDEPENDENTLY ACCELERATED AND CRASHED INTO ANOTHER VEHICLE. THERE WERE NO INJURIES. THE VEHICLE WAS TAKEN TO A DEALER FOR INSPECTION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED BUT PROVIDED NO ASSISTANCE. THE FAILURE MILEAGE WAS 74,000. UPDATED 3/13/13 *CN THE CONSUMER STATED THE DEALER DID NOT FIND ANYTHING MECHANICALLY WRONG. THE VEHICLE WAS SOLD BACK TO THE DEALER. UPDATED 04/09/2013 *JS
TL*THE CONTACT OWNS A 2003 TOYOTA SIENNA. THE CONTACT WAS DRIVING WHEN THE VEHICLE SUDDENLY ACCELERATED. IT WENT THROUGH THE CONTACT'S GARAGE AND INTO THEIR LIVING ROOM. THE VEHICLE WAS DESTROYED. THERE WERE NO INJURIES. THE VIN WAS UNAVAILABLE. THE CURRENT AND FAILURE MILEAGES WERE 112,000.
TL*THE CONTACT OWNS A 2003 TOYOTA SIENNA. WHILE DRIVING APPROXIMATELY 5 MPH, THE VEHICLE SUDDENLY ACCELERATED CRASHING INTO THE FRONT OF THE CONTACTS HOME. THERE WAS NO POLICE REPORT TAKEN. THE CONTACT DIDN'T SAY IF THERE WERE ANY INJURIES. THE CONTACT DID NOT REPORT ANY INJURIES. THE CURRENT AND FAILURE MILEAGES WERE APPROXIMATELY 30,000. UPDATED 05/18/10. *LJ
TOYOTA SIENNA 2003 I WAS PULLING INTO A PARKING SPACE IN A PARKING GARAGE. I BELIEVE I HAD PUT THE CAR IN REVERSE TO BACK UP TO STRAIGHTENED THE CAR AND I PUT MY FOOT ON THE BRAKE. THE CAR SUDDENLY SHOT FORWARD FULL FORCE AND WAS STOPPED BY A CONCRETE AND WIRE RETAINING WALL. THE ENGINE DIED AT IMPACT. THE CAR WAS NOT DRIVABLE AND WAS TOWED. I WAS STUNNED. I WENT INTO THE BUILDING AND AFTER A SHORT TIME FELT CHEST PAIN AND SHORTNESS OF BREATH. I WENT TO THE EMERGENCY ROOM AND WAS TREATED AND RELEASED. I RECEIVED A CHEST WALL CONTUSION, PROBABLY CRACKED RIB(S), DEEP TISSUE CONTUSION AND A LARGE BRUISE FROM THE SEAT BELT. I WAS GIVEN VICODIN FOR PAIN. THE CAR WAS TOWED TO A TOYOTA DEALERSHIP BUT THE DAMAGE HAS NOT BEEN ESTIMATED YET. I AM AWARE THAT THE PROBLEM OF UNCONTROLLED ACCELERATION IN TOYOTA SIENNAS HAS BEEN REPORTED TO BOTH THIS AGENCY AND TOYOTA BEFORE (NHTSA REPORT #10265288). WHY HAS THIS NOT BEEN ADDRESSED OR THE VEHICLE RECALLED? ARE YOU WAITING FOR ANOTHER TRAGEDY LIKE THE ONE PREVIOUSLY REPORTED ON BY THE MEDIA? I COULD HAVE BEEN KILLED. *TR
DEFECTIVE VEHICLE CONTROL SENSOR ON 2003 TOYOTA SIENNA CAUSED AUTOMATIC BRAKING ON DRY PAVEMENT (CAR WAS NOT IN A SKID) AT OVER 10 MPH. THIS FIRST HAPPENED IN NOVEMBER/DECEMBER 2008 TIMEFRAME. AFTER READING BLOGS IN HTTP://TOWNHALL-TALK.EDMUNDS.COM/WEBX?14@112.TUXHAXBJDJ5@.F0FA178/49#49, WE FOUND THAT THIS WAS A PROBLEM THAT WAS AT THE TIME COMMON TO TOYOTA RAVS. SINCE THEN THERE HAVE BEEN MANY MORE PROBLEMS REPORTED INCLUDING THOSE THAT HAVE OCCURRED WITH TOYOTA SIENNAS. THIS CAUSED US TO REMOVE THE SENSOR, WHICH MAY HAVE BEEN THE CAUSE FOR AN ACCIDENT IN WHICH WE SLID OUR MINIVAN OFF OF AN ICY ROAD AND DROPPED 7 FEET INTO A EMBANKMENT WHILE TRAVELING WITH OUR 4 CHILDREN. FORTUNATELY, NO ONE WAS INJURED, HOWEVER WE BELIEVE THAT IF THE VSC HAD BEEN PROPERLY FUNCTIONING IT WOULD NOT HAVE CAUSED US TO DISABLE IT, AND IT MAY HAVE PREVENTED THE ACCIDENT WHICH OCCURRED IN JANUARY OF 2009. MY HUSBAND HAD THE VSC SENSOR SUBSEQUENTLY REPLACED THIS PAST YEAR AND HE REPORTED RECENTLY THAT THE VSC HAD AGAIN AUTOMATICALLY ACTIVATED ON DRY PAVEMENT (NO SKID). I BELIEVE THAT THEIR IS A DEFECT IN THE VSC SENSOR OR THE COMPUTER CONTROL SOFTWARE WHICH ACTIVATES THE BRAKES. I AM REQUESTING THAT NHTSA INVESTIGATE THIS FAILURE AS I BELIEVE THERE HAS BEEN ENOUGH INCIDENTS TO WARRANT INVESTIGATION. I ALSO KNOW THIS TO BE A SAFETY ISSUE. *TR
INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) 2003 TOYOTA SIENNA MY VEHICLE WAS ACCELERATING FROM A RAMP ONTO THE HIGHWAY WHEN I DISCOVERED TO MY HORROR THAT EVEN AFTER I TOOK MY FOOT OFF THE GAS PEDAL (ABOUT 60 MPH), THE VEHICLE CONTINUED TO ACCELERATE (UP TO 90 MPH). I EVEN TRIED USING MY FOOT TO HOOK THE GAS PEDAL TOWARD ME TO STOP THE CAR. WHEN THAT DID NOT SUCCEED, I PRESSED ON THE PARKING AND NORMAL BRAKES TO SLOW DOWN THE CAR AND TURNED OFF THE CAR. THE VERY NEXT DAY, I HAD MY CAR TOWED TO , DIEHL TOYOTA OF YORK [XXX] . THEY DID NOT DISCOVER ANY ISSUES. HOWEVER IN LIGHT OF THE MASSIVE TOYOTA RECALLS, I BELIEVE THAT MY CAR IS SIMILARLY DEFECTIVE. I HAD TRIED CALLING 800 331 4331, THE PHONE NUMBER PROVIDED BY TOYOTA FOR SUCH DEFECTIVE VEHICLE ISSUES BUT NO ONE EVER PICKS UP. *TR
THE VEHICLE ACCELERATED TO 85 MPH, WHILE ON THE HIGHWAY. THE CONSUMER PASSED SEVERAL VEHICLES, CHANGING LANES, TO AVOID A COLLISION. THE CONSUMER PROCEEDED TO STRIKE A CONCRETE BARRIER. NO INJURIES WERE SUSTAINED. *NM
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