There are 5 owner-reported fuel system complaints for the 2008 Toyota Siennain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
NOV 16,2017 OIL COOLER PIPE AND LINES BURST ON HIGHWAY WHILE DRIVING THRU NO BREAK DOWN LANE TUNNEL. VAN ALL MOTOR OIL WITHIN MINUTES, RESULTING IN LOSS OF ENGINE POWER. EXTENDED SERVICE WARRANTY FROM TOYOTA "ZE2" HAD BEEN GIVEN TO TOYOTA DEALERS NATION WIDE BUT DESPITE DEALER SERVICE DONE IN JULY 2017 NO MENTION OF A PROBLEM MENTIONED. NO NOTIFICATION WAS SENT TO OWNERS OF A POTENTIAL PROBLEM.IT CREATED A SAFETY ISSUE THAT COULD HAVE BEEN LIFE THREATENING.
DEFECTIVE OIL COOLING HOSE RUPTURED SUDDENLY WHEN PARKED, SPILLING OIL IN GROCERY STORE PARKING LOT AND LEAVING THE FAMILY STRANDED. WE HAD TO TOW CAR TO CAPITOL TOYOTA IN SAN JOSE. THE CAR STARTED LEAKING OIL ON THE WAY TO THE GROCERY STORE AS EVIDENCED BY A TRAIL OF OIL LEADING UP TO PARKING LOT. THE CAR HAS NOW BEEN AT CAPITOL TOYOTA SINCE 7/17 (ABOUT 4 WEEKS) WITH NO ETA FOR NEW IMPROVED METAL REPLACEMENT HOSE. THE SERVICE DEPARTMENT AT CAPITOL TOYOTA ADMITTED THIS IS A DESIGN DEFECT. APPARENTLY THE BETTER REPLACEMENT HOSE IS ON NATIONAL BACK ORDER, AGAIN WITH NO ETA, AND SO NO LINE OF SIGHT ON WHEN THE CAR WILL BE FIXED. IN THE MEAN TIME MY WIFE HAS NO CAR TO DRIVE, AND TOYOTA REFUSES TO SUPPLY A LOANER. I HAVE ESCALATED THIS WITH TOYOTA HEAD QUARTERS AND THEY ALSO WILL NOT PROVIDE A LOANER. THIS SITUATION IS VERY FRUSTRATING, AS THE CAR IS AT THE DEALER, AND NO TIMELINE FOR WHEN THE PART WILL COME IN AND REPAIR WILL BE DONE. I HAVE NEVER EXPERIENCED THIS SORT OF SITUATION BEFORE, WITH THE MANY CARS I'VE OWNED IN THE PAST.
THIS IS REGARDS TO MY 2008 TOYOTA SIENNA LE FWD 8 PASSENGER MINIVAN. ON 12/21/2014 MY VAN DROPPED DEAD IN THE MIDDLE OF BUSY GUNBARRELL RD IN CHATTANOOGA TN. FOLLOWING UP WITH THE DIAGONOSTICS ON THE VEHICLE IT WAS DETECTED THAT THE FUEL PUMP HAD FAILED. SINCE I BOUGHT THIS VEHICLE AS CERTIFIED USED FROM TOYOTA IN 03/2010 I WAS CONFIDENT THAT THIS PART IS COVERED BUT TO MY FRUSTRATION - TOYOTA SAID THE FUEL PUMP IS CLASSIFIED AS AN ELECTRICAL SYSTEM AND UNFORTUNATELY OTHER THAN THEIR HYBRID MODELS IT IS NOT COVERED BY ANY TYPE WARRANTY. UPON RESEARCHING MULTIPLE WEBSITES, CHAT FORUMS, AND AMONG REGISTERED TOYOTA OWNERS IT CAME TO MY UNDERSTANDING/CONCLUSION THAT THE TOYOTA SIENNA MODELS FROM 2007 TO 2010 HAD NUMEROUS FUEL PUMP, PULLEYS, AND BRAKE DRUM ISSUES. THE VEHICLES AFFECTED HAD TOTAL MILES RANGING FROM 20K TO 130K. NEW VEHICLES WITH FAILING FUEL PUMPS AND NOT COVERED UNDER WARRANTY - SHOCKING. IT IS MY UNDERSTANDING THAT WITHOUT A FUEL PUMP NO VEHICLES CAN RUN AND IT IS VERY UNFORTUNATE TO SEE THAT AUTOMAKERS CLASSIFY IT AS AN ELECTRICAL ITEM AND THE NHTSA SADLE AGREES WITH IT. THIS REPAIR COSTED ME OVER $600 FOR PARTS AND LABOR. IF I WERE TO USE THE TOYOTA DEALERSHIP FOR PARTS AND SERVICE IT WOULD HAVE COSTED ME OVER $900 ( VIA 3 ESTIMATES FROM DEALERSHIPS) THROUGH THIS LETTER I AM KINDLY REQUESTING AN INVESTIGATION TO THE FUEL PUMP ISSUES FOR TOYOTA SIENNA FROM MODEL YEAR 2007 ONWARDS SO A PROPER WARRANTY COVERAGE, WARNINGS CAN BE PROVIDED TO REGISTERED OWNERS. *TR
TL* THE CONTACT OWNS A 2008 TOYOTA SIENNA. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 5 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS UNABLE TO RESTART AND WAS TOWED TO THE DEALER. THE DEALER DIAGNOSED THAT THE FUEL PUMP RESISTER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 62,000.
TO CHANGE A TIRE THE FLOOR JACK WAS PLACED IN FRONT OF THE LEFT REAR TIRE A LITTLE TOO FAR TOWARD THE CENTER (FROM LEFT TO RIGHT) OF THE VEHICLE. THE PLACEMENT APPEARED TO BE AGAINST STEEL BUT IN REALITY THE MATERIAL WAS BLACK PLASTIC. WHEN THE VEHICLE WAS LIFTED THE PLASTIC GAVE WAY AND DAMAGED THE FILLER PIPE TO THE FUEL TANK CAUSING FUEL TO BE DUMPED TO THE STATION DRIVE DURING THE REFUELING PROCESS. IT WOULD APPEAR THAT THE PLASTIC IS THERE TO PROTECT THE FUEL FILLER PIPE. THIS WOULD OCCUR EACH TIME REFUELING TAKES PLACE. THE CONSEQUENCES COULD BE GRAVE! A CONSIDERABLE AMOUNT OF FUEL WAS SPILLED BECAUSE THE SLOPE OF THE DRIVE WAS AWAY FROM THE OPERATORS VIEW. REPLACEMENT OF PARTS WILL CORRECT THE PROBLEM. I HAVE REQUESTED THE OLD PARTS BE RETURNED TO ME.
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