There are 8 owner-reported fuel system complaints for the 2005 Toyota Siennain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
THE ACCELERATOR STUCK ON THIS VAN AS I WAS PASSING ANOTHER VEHICLE ON A RURAL, TWO LANE ROAD. AS SOON AS I DEPRESSED THE ACCELERATOR TO PASS, I KNEW SOMETHING WAS WRONG. THE GAS PEDAL STAYED DOWN EVEN AFTER I REMOVED MY FOOT AND THE VAN CONTINUED TO ACCELERATE EVEN FASTER EVEN THOUGH I WAS NOW HITTING THE BRAKES HARD! WITH CURVES IN THE ROAD APPROACHING IN ABOUT A MILE, I HAD TO DO SOMETHING FAST! I WAS STANDING ON THE BRAKES WITH BOTH FEET NOW AND THE VAN CONTINUED TO SPEED UP. I WAS ABLE TO SHIFT IT INTO NEUTRAL, ALL THE WHILE CONTINUING TO STAND ON THE BRAKES. THE ENGINE REVVED EVEN FASTER BUT I WAS ABLE TO GET THE VAN TURNED OFF THE ROAD INTO A FARM FIELD ACCESS DRIVE. THE VAN STILL WASN'T STOPPING BUT AT LEAST I WAS OFF THE ROAD AND NOT GOING TO HIT ANOTHER VEHICLE. AS THE VAN CONTINUED TO MOVE, I THOUGHT ABOUT BAILING OUT BUT THANKFULLY, I DIDN'T. THE VAN WAS STILL GOING FAST ENOUGH IT COULD'VE RUN OVER ME AND I HAD NO IDEA WHERE IT WOULD END UP IF I GOT OUT! BY THE GRACE OF GOD, THE VAN FINALLY STOPPED AFTER I STARTED TURNING THE WHEEL HARD TO THE LEFT. I SHIFTED IT INTO PARK AND SHUT IT OFF WHILE I SAT THERE SHAKING AND TRYING TO DECIDE WHO TO CALL FIRST. THIS SITUATION COULD HAVE TURNED OUT EXTREMELY BAD HAD THE CIRCUMSTANCES BEEN DIFFERENT. THANK GOD THERE WAS NO ONE IN FRONT OF ME WHILE THIS WAS GOING ON, I WASN'T IN A CONGESTED AREA OF HOUSES OR OTHER VEHICLES OR ON A BUSY HIGHWAY. I'M SO GLAD ONE OF OUR BOYS WASN'T DRIVING THIS WHEN IT HAPPENED! THIS WAS THE SCARIEST THING THAT'S EVER HAPPENED TO ME WHILE DRIVING OVER 30 YEARS! THE VAN WAS TOWED TO THE DEALERSHIP WHERE WE PURCHASED IT AND HAVE HAD IT SERVICED FAITHFULLY. I'M WAITING TO HEAR BACK FROM THEM WHEN THEY WILL BE ABLE TO LOOK AT IT. *TR
DRIVER SIDE PASSENGER DOOR WILL NOT OPEN PAST ABOUT 4 INCHES DUE TO LOCKING MECHANISM AT BOTTOM THAT ENGAGES WHEN FUEL DOOR IS OPEN STUCK IN THE UP POSITION. FUEL DOOR IS CLOSED BUT THE LOCKING MECHANISM THAT PREVENTS THE DOOR FROM OPENING WHEN THE FUEL DOOR IS OPEN REMAINS UP. *TR
ON DEC. 3, 2007 AT 10 AM I LEFT MY MORNING EXERCISE CLASS AND DROVE INTO THE PARKING LOT AT THE BANK. I WAS PULLING INTO A PARKING SPACE, WITH MY RIGHT FOOT LIGHTLY ON THE BRAKE PEDAL, THE MINI VAN SUDDENLY ACCELERATED AT A HIGH SPEED. IT WENT OVER A CURB AND WAS STOPPED BY A TREE. IT HAPPENED VERY SUDDENLY, WITH NO WARNING. THE MINI VAN IS CURRENTLY AT AN AUTO REPAIR CENTER. THE DAMAGE IS ESTIMATED AT OVER $4000. I AM AFRAID TO EVER DRIVE THAT VAN AGAIN. AFTER THE REPAIRS ARE COMPLETED IT WILL BE TAKEN TO THE TOYOTA DEALER TO BE CHECKED OUT BY ENGINEERING. *TR
GAS TANK PUNCTURED. GAS TANK IS MADE OUT OF PLASTIC WITH NO OUTER COVERING TO PROTECT BEING PUNCTURED FROM UNDERNEATH. WE RAN OVER WOOD, PUNCTURED GAS TANK AND LEAKED GAS ALL OVER FREEWAY WITHOUT OUR KNOWLEDGE. *TR
TOYOTA SIENNA ADVERTISES MPG AVE OF 18 AND I HAVE ONLY RECIEVED 14MPG WITH MINE. THIS IS FALSE ADVERTISING AND COSTS CONSUMERS $100'S OF EXTRA DOLLARS!!
TRUTH IN TOYOTA STICKER ABOUT MPG ON THEIR CARS. *NM
MY HUSBAND AND I PURCHASED A 2004 TOYOTA SIENNA IN FEB. 2004. WE TRADED IT ON 6/24/2005 FOR A 2005 TOYOTA SIENNA. THE REASON WAS WE DID NOT NEED AN 8-PASS. AND CAPTAIN CHAIRS IN 2ND ROW AND I HATED THE COLOR. SO WE GOT A 2005 BLUE MIRAGE LE 7-PASSENGER ON 6/24/05. BUT, YES WE HAVE A PROBLEM MY 04 GOT 19.6 MI. PER GAL. THIS ONE IS ONLY GETTING 14.3 MPG. I STILL DRIVE TO SAME PLACES AND I PUSHED THE 04 TO ITS LIMITS UNLIKE THE 05 THAT I DROVE LIKE IT IS A BABY. I BROUGHT MY CAR TO THE DEALERSHIP ON 7/25/2005 TO HAVE THEM FIND OUT WHAT THE PROBLEM WAS. I WAS TOLD THEY WERE GOING DRIVE IT 75 MILES. WELL THEY DROVE IT 210 MI. THEY SAID THAT THE OVERHEAD COMPUTER WAS NOT SET CORRECTLY AND IT WAS RESET TO 22.7 MPG. AS I WAS LEAVING THE COMPUTER WAS DROPPING ON THE MPG, I CALLED THE SERVICE MANAGER ROB. HE TOLD ME THAT I WAS WRONG AND THAT I NEEDED TO DRIVE IT FOR AT LEAST 5,000 MI. BEFORE I KNEW WHAT THE CAR WOULD GET. BULL MY 04 ALWAYS GOT 19 TO 20 MPG. TODAY I MANUALLY TRACKED IT AND ONCE AGAIN MY CAR IS ONLY GETTING 14.33 MPG. TOYOTA CORP. CALLED ME ABOUT THE VAN. HAVE NOT HEARD ANYTHING FROM THEM. THEY SAID THERE WAS SOMETHING WRONG WITH IT. SHE SAID HER MANAGER WOULD CONTACT ME STILL NO WORD. SO, TONIGHT MY HUSBAND AND I WENT UP THERE TO SPEAK WITH THE MANAGER WHO SOLD US THE CAR, HE WASN'T THERE BUT ANOTHER MANAGER SAID I NEEDED TO SPEAK WITH THE MANAGER THAT SOLD IT TO US. AND TO NEVER GO BY THE COMPUTER ALWAYS FIGURE GAS MI. MANUALLY. SO, WHY DID I PAY FOR IT? WE HAVE BOUGHT 4 TOYOTAS FROM THEM IN THE LAST 4 YEARS AND HAVE REMAINED FAITHFUL CUSTOMERS. I DID NOT SEE ANYTHING ON YOUR WEBSITE THAT REFERRED TO THIS. DO YOU HAVE ANY IDEAS? THANK YOU, GENA M. STOKES. *NM
THERE IS A FAULT IN THE GAS SENSOR WHICH GOES FROM THE PEDAL TO THE ENGINE. THE CAR FAILS TO ACCELERATE WHEN THE PEDAL IS DEPRESSED, THEN SUDDENLY LEAPS FORWARD, THROWING THE OCCUPANTS BACK AGAINST THE SEATS. IT IS DANGEROUS TO TRY TO ENTER A HIGHWAY, PASS A SLOWER VEHICLE, OR RETAIN SPEED WHEN GOING UPHILL.
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 26, 2026