NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
24 reportsClear category filter134,000 miles · Aug 24, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 TOYOTA SIENNA. THE CONTACT STATED THAT WHEN DRIVING APPROXIMATELY 60 TO 65 MPH, THE VEHICLE WOULD SUDDENLY STALL WITHOUT WARNING. THE VEHICLE WAS UNABLE TO RESTART SO IT WAS TOWED TO AN INDEPENDENT MECHANIC. AFTER DIAGNOSIS, THEY ADVISED THAT THE ENGINE NEEDED TO BE REPLACED DUE TO SLUDGE BUILD-UP AND…
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TL* THE CONTACT OWNS A 2001 TOYOTA SIENNA. THE CONTACT STATED THAT WHEN DRIVING APPROXIMATELY 60 TO 65 MPH, THE VEHICLE WOULD SUDDENLY STALL WITHOUT WARNING. THE VEHICLE WAS UNABLE TO RESTART SO IT WAS TOWED TO AN INDEPENDENT MECHANIC. AFTER DIAGNOSIS, THEY ADVISED THAT THE ENGINE NEEDED TO BE REPLACED DUE TO SLUDGE BUILD-UP AND OIL JELLING. THE VEHICLE WAS REPAIRED FOR THE ENGINE. THE MANUFACTURER WAS CONTACTED AND THEY OFFERED NO ASSISTANCE. THE FAILURE AND CURRENT MILEAGES WERE APPROXIMATELY 134,000. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10421331
118,000 miles · Aug 23, 2010
Engine And Engine Cooling
I HAVE A SIENNA LE 2001. 118,000 MILES. WE HAVE BEEN THE ONLY OWNERS SINCE WE BOUGHT IT. WE HAVE NO PERFECT RECORD OF OIL CHANGES BUT WE HAVE DONE IT PERIODICALLY. ABOUT 3-4 MONTHS AGO, IT WAS RUNNING OK, BUT IT BLEW OUT WHITE-ISH/ BLUE-ISH SMOKE OCCASIONALLY (USUALLY WHEN FIRST STARTING, IT DIDN'T SEEM TO MAKE A DIFFERENCE …
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I HAVE A SIENNA LE 2001. 118,000 MILES. WE HAVE BEEN THE ONLY OWNERS SINCE WE BOUGHT IT. WE HAVE NO PERFECT RECORD OF OIL CHANGES BUT WE HAVE DONE IT PERIODICALLY. ABOUT 3-4 MONTHS AGO, IT WAS RUNNING OK, BUT IT BLEW OUT WHITE-ISH/ BLUE-ISH SMOKE OCCASIONALLY (USUALLY WHEN FIRST STARTING, IT DIDN'T SEEM TO MAKE A DIFFERENCE IF IT WAS HOT OR COLD). IT ALSO HAD LITTLE AND OCCASIONAL POWER LOSS WHEN ACCELERATING FROM A STOP. I TOOK IT TO THE DEALER WHERE WE BOUGHT IT, AND THEY SAID THEY JUST TOOK OFF THE TOP COVER OF THE ENGINE AND IT LOOKED LIKE IT WAS GUMMED UP WITH OIL. I HAVE CHANGED THE PCV VALVE, I TOOK IT TO A PLACE FOR AN OIL AND OIL FILTER CHANGE, I AM CONCERNED THE DAMAGE WILL CONTINUE TO THE ENGINE. THE DEALER SAID I NEED A NEW ENGINE, COSTING AROUND $8000. I ASKED A SECOND OPINION OF THE MECHANIC THAT HAS WORKED ON OUR CARS, AND HE THINKS HE WOULD NEED TO TAKE APART THE ENGINE AND FIGURE OUT HE PROBLEM, COSTING AROUND $2000-$3000, HE ALSO MENTIONED THE POSSIBILITY OF A NEW MOTOR. HONESTLY, I DO NOT RECALL RECEIVING INFORMATION ABOUT THE "SPECIAL POLICY ADJUSTMENT" FROM TOYOTA OR DEALER REGARDING CHECK-REPLACE THE ENGINES THAT ARE OR COULD BE DAMAGED FROM SLUDGE. I WILL APPRECIATE YOUR INPUT AND SUPPORT. *TR
NHTSA ODI #10351368
105,000 miles · Feb 18, 2010
Engine And Engine Cooling
THE ENGINE FAILED AND HAD TO BE REPLACED AT A COST OF $5,000 DUE TO OIL SLUDGE BUILDUP. TRAVELING ON I-4 FROM TAMPA TO ORLANDO THE CHECK ENGINE LIGHT APPEARED THEN WE HEARD A TAPPING FROM THE ENGINE,. I PULLED OFF THE ROAD AND AAA TOWED THE VEHICLE AND A RENTAL CAR COMPANY PICKED US UP. I HAD TWO ELDERLY PASSENGERS (IN THEIR 80'…
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THE ENGINE FAILED AND HAD TO BE REPLACED AT A COST OF $5,000 DUE TO OIL SLUDGE BUILDUP. TRAVELING ON I-4 FROM TAMPA TO ORLANDO THE CHECK ENGINE LIGHT APPEARED THEN WE HEARD A TAPPING FROM THE ENGINE,. I PULLED OFF THE ROAD AND AAA TOWED THE VEHICLE AND A RENTAL CAR COMPANY PICKED US UP. I HAD TWO ELDERLY PASSENGERS (IN THEIR 80'S) WITH WALKERS WHO HAD TO TRAVERSE THE GRASS ALONG THE INTERSTATE TO GET TO THE RENTAL CAR AND WERE NEARLY BLOWN OVER BY PASSING TRUCKS. TOYOTA REFUSED TO HONOR A CLAIM FOR REPAIRS ALTHOUGH THEY HAD AGREED IN A RECENT LOUISIANA LAWSUIT TO COVER SAID REPAIRS FOR 8 YEARS FROM DATE OF PURCHASE. MY FAILURE WAS 8 YEARS AND 10 MONTHS FROM PURCHASE. THE SLUDGE TOOK MUCH LONGER THAN 8 MONTHS TO BUILD UP BUT TOYOTA REFUSED TO HONOR THEIR STATED COMMITMENT TO ASSIST ALL AFFECTED BY OIL SLUDGE DAMAGE (OVER 3,000 COMPLAINTS). THEIR PRODUCT WAS DEFECTIVE AND DANGEROUS AND THEIR DENIAL TO ASSIST WAS DISHONORABLE. *TR
NHTSA ODI #10311876
105,000 miles · Feb 18, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 TOYOTA SIENNA. WHILE THE CONTACT WAS DRIVING 65 MPH HE NOTICED THAT THE CHECK ENGINE LIGHT APPEARED ON THE DASHBOARD, MOMENTS LATER THE CONTACT HEARD A KNOCKING SOUND. THE VEHICLE WAS TAKEN TO THE DEALERSHIP WHERE THE CONTACT WAS INFORMED THAT THE ENGINE NEEDED TO BE REPLACED DUE TO EXCESSIVE ENGINE SL…
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TL*THE CONTACT OWNS A 2001 TOYOTA SIENNA. WHILE THE CONTACT WAS DRIVING 65 MPH HE NOTICED THAT THE CHECK ENGINE LIGHT APPEARED ON THE DASHBOARD, MOMENTS LATER THE CONTACT HEARD A KNOCKING SOUND. THE VEHICLE WAS TAKEN TO THE DEALERSHIP WHERE THE CONTACT WAS INFORMED THAT THE ENGINE NEEDED TO BE REPLACED DUE TO EXCESSIVE ENGINE SLUDGE. THERE WERE NO PRIOR WARNINGS. THE CURRENT AND FAILURE MILEAGES WERE 105,000.
NHTSA ODI #10311871
100,081 miles · Oct 13, 2008
Engine And Engine Cooling
ENGINE OIL LIGHT CAME ON, THEN CHECK ENGINE LIGHT CAME ON, ENGINE SHUT OFF, NO OIL PRESENT IN ENGINE. *TR
NHTSA ODI #10245235
54,525 miles · Jan 28, 2007
Engine And Engine CoolingFuel System, Gasoline
AT 54,525 MILES, THE CHECK ENGINE LIGHT CAME ON. IT WAS DIAGNOSED AS "REPLACE AIR/FUEL SENSOR B1 S1." FAILURE CAUSED EXCESSIVE DAMAGE BECAUSE THE SENSOR FUSED INTO THE REAR EXHAUST MANIFOLD. DIAGNOSTIC TESTING $ 49.00 SENSOR REPLACEMENT PART 227.52 " " LABO…
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AT 54,525 MILES, THE CHECK ENGINE LIGHT CAME ON. IT WAS DIAGNOSED AS "REPLACE AIR/FUEL SENSOR B1 S1." FAILURE CAUSED EXCESSIVE DAMAGE BECAUSE THE SENSOR FUSED INTO THE REAR EXHAUST MANIFOLD. DIAGNOSTIC TESTING $ 49.00 SENSOR REPLACEMENT PART 227.52 " " LABOR 150.00 REAR EXHAUST MANIFOLD 154.21 REAR EXHAUST MANIFOLD GASKET 29.27 REPAIR WAS NOT DONE AT A TOYOTA DEALERSHIP. I AM REPORTING THIS SO THAT TOYOTA WILL CHANGE THE DESIGN. FAILED PART SHOULD NOT DAMAGE SURROUNDING STRUCTURES. SUGGEST RECALL ON THIS PART IF TOYOTA CONTINUES TO USE THIS DESIGN. *NM
NHTSA ODI #10180941
25,000 miles · Mar 23, 2006
Electrical SystemEngine And Engine CoolingFuel System, Gasoline
2001 TOYOTA SIENNA LE, PURCHASED NEW, STARTED HAVING PROBLEMS. "CHECK ENGINE" LIGHT CAME ON WHEN VEHICLE HAD APPROXIMATELY 25,000 PLUS/MINUS MILES. UNDER WARRANTY, TOYOTA DEALERSHIP REPLACED THE OXYGEN SENSOR WITHOUT A CHARGE. HOWEVER, DURING THIS PROCESS, THE "BEEP" SIGNAL YOU HEAR WHEN LOCKING-UNLOCKING THE VEHICLE WITH REMOTE…
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2001 TOYOTA SIENNA LE, PURCHASED NEW, STARTED HAVING PROBLEMS. "CHECK ENGINE" LIGHT CAME ON WHEN VEHICLE HAD APPROXIMATELY 25,000 PLUS/MINUS MILES. UNDER WARRANTY, TOYOTA DEALERSHIP REPLACED THE OXYGEN SENSOR WITHOUT A CHARGE. HOWEVER, DURING THIS PROCESS, THE "BEEP" SIGNAL YOU HEAR WHEN LOCKING-UNLOCKING THE VEHICLE WITH REMOTE KEY WAS DISAPPEARED. THIS IS ALSO FIXED UNDER WARRANTY. THE "CHECK ENGINE" LIGHT CAME ON AGAIN WHEN THE VEHICLE HAD ABOUT 35,000 MILES. TOYOTA DEALERSHIP SAID IT IS DUE TO A DIRTY VACUUM HOSE, THEY CLEANED IT WITH A CHARGE LITTLE OVER $100.00. THE NEXT DAY THE "CHECK ENGINE" LIGHT CAME ON AGAIN, THIS TIME THE TOYOTA DEALERSHIP SAID THEY NEED TO REPLACE THE CHARCOAL CANISTER (PARTS FREE, BUT WE HAVE TO PAY LABOR--ABOUT $100.00). THIS THING CAUSES EXTREME MENTAL DISTRESS, TIME, MONEY, SECURITY ETC.*JB
NHTSA ODI #10153547
82,000 miles · Dec 23, 2005
Engine And Engine Cooling
THE ENGINE OF MY TOYOTA SIENNA 2001 WITH AN IDENTIFIED OIL SLUDGE PROBLEM SEIZED WHILE DRIVING AT HIGHWAY SPEEDS. VEHICLE COULD NOT BE CONTROLLED AND MY TODDLER THREW UP IN FEAR AS WE TRIED TO AVOID BEING SMASHED INTO WHILE THE CAR COASTED TO A STOP. MECHANIC REPEATEDLY SAID CAM SEIZED, METAL FILINGS FOUND, AND "COULD NOT THIN…
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THE ENGINE OF MY TOYOTA SIENNA 2001 WITH AN IDENTIFIED OIL SLUDGE PROBLEM SEIZED WHILE DRIVING AT HIGHWAY SPEEDS. VEHICLE COULD NOT BE CONTROLLED AND MY TODDLER THREW UP IN FEAR AS WE TRIED TO AVOID BEING SMASHED INTO WHILE THE CAR COASTED TO A STOP. MECHANIC REPEATEDLY SAID CAM SEIZED, METAL FILINGS FOUND, AND "COULD NOT THINK OF ANY OTHER REASON BUT THE SLUDGE PROBLEM." TOYOTA REFUSED TO REPAIR THE VEHICLE UNDER UNLIMITED MILEAGE, 8-YEAR WARRANTY. CAR IS PRESENTLY WITH DEALER AND MAY BE EXAMINED BY ENGINEERS FROM NHTSA (DEALER AGREED ON 12/22/05). THIS FAILURE WAS PREDICTED BY ANOTHER DEALER. CAR ALWAYS SMOKED--BLAMED ON "NEW ENGINE BREAK IN", "LACK OF MAINTENANCE", ETC. LATER TOYOTA SENT LETTER ABOUT THE ISSUE. THIS TIME DEALER AGREES MAINTENANCE WAS EXCELLENT. *NM
NHTSA ODI #10146013
Mileage unknown · Jul 29, 2005
Electrical SystemEngine And Engine CoolingLatches/locks/linkages
WE OWN A 2001 TOYOTA SIENNA VAN, WE PURCHASED IT IN 2001 BUT IT WAS USED WITH 18,000 MILES ON IT. SINCE PURCHASING THE VEHICLE, SEVERAL THINGS HAVE GONE WRONG. #1- PASSENGER SIDE POWER WINDOW HAD A DEFECTIVE MOTOR AND WOULD NOT GO BACK UP. TOOK IT TO THE DEALER WHO SAID IT WAS NOT COVERED UNDER WARRANTY, SO WE HAD TO PAY OUT…
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WE OWN A 2001 TOYOTA SIENNA VAN, WE PURCHASED IT IN 2001 BUT IT WAS USED WITH 18,000 MILES ON IT. SINCE PURCHASING THE VEHICLE, SEVERAL THINGS HAVE GONE WRONG. #1- PASSENGER SIDE POWER WINDOW HAD A DEFECTIVE MOTOR AND WOULD NOT GO BACK UP. TOOK IT TO THE DEALER WHO SAID IT WAS NOT COVERED UNDER WARRANTY, SO WE HAD TO PAY OUT OF POCKET FOR THAT REPAIR. #2- DRIVER'S SIDE SLIDING DOOR WOULD NOT LATCH SHUT. THE BUTTON GOT STUCK FROM THE INSIDE WHICH PREVENTED THE DOOR FROM LATCHING SHUT. THIS HAD HAPPENED MANY TIMES BEFORE BUT WE WERE ABLE TO GET THE BUTTON POPPED OUT AND THE DOOR WOULD SHUT. BUT ON ONE OCCASION THE BUTTON POPPED OUT AND THE DOOR STILL WOULD NOT SHUT. WE HAD TO DRIVE HOME HOLDING THE DOOR SHUT THE ENTIRE WAY! OF COURSE, THIS IS A HUGE SAFETY ISSUE WITH OUR 2 YOUNG CHILDREN IN THE CAR. THE PROBLEM WAS FIXED AT THE DEALER (AGAIN NOT UNDER WARRANTY), BUT THE DOOR STILL CAN NOT BE OPENED FROM THE INSIDE, OR THE BUTTON GETS STUCK IN. #3- CHECK ENGINE LIGHT CAME ON AND A DIAGNOSTIC TEST REVEALED THE FOLLOWING PROBLEMS- IDLE AIR CONTROL, BANK 1 SENSOR (MOST LIKELY OXYGEN SENSOR), LEAKY CHARCOAL CANISTER. WE FIXED THE IDLE AIR CONTROL SINCE THAT WAS CAUSING THE VAN TO NOT START AND STALL. THIS REPAIR WAS ALMOST $700, AND NOT COVERED UNDER WARRANTY BECAUSE WE HAD GONE OVER 36,000 MILES. WE DID NOT FIX THE OTHER TWO PROBLEMS LAST MONTH DUE TO COST. THE VAN OVERHEATS AND CAN NOT BE DRIVEN. WE WROTE A LETTER TO TOYOTA AND TALKED TO THEM VIA PHONE. THEY TOLD US THERE IS NOTHING THEY CAN DO BECAUSE OUR VAN IS NOT A LEGAL US VAN- IT IS WAS BUILT IN CANADA. WE BOUGHT IT AT A TOYOTA DEALER IN ROCHESTER, NY AND WERE NEVER TOLD IT WAS CANADIAN. WE WERE ALSO TOLD THAT NO WARRANTY WOULD EVER BE COVERED IN THE US BECAUSE IT IS CANADIAN. CARFAX.COM SAYS IT WAS BUILT IN THE UNITED STATES HOWEVER. WE TRIED TO GO THE ROUTE OF THE LEMON LAW, BUT COULD NOT. *NM
NHTSA ODI #10130633
33,000 miles · Feb 7, 2005
Engine And Engine Cooling
CONSUMER STATED ENGINE SENSOR LIGHT CONTINUED TO COME ON. CONSUMER WAS CONCERNED THAT ENGINE WILL FAIL WHILE DRIVING. *AK *JB
NHTSA ODI #10092130
Official recalls
2Apr 20, 2010
TOYOTA IS RECALLING CERTAIN MODEL YEAR 1998 THROUGH 2010 SIENNA PASSENGER VEHICLES MANUFACTURED BETWEEN AUGUST 7, 1997 AND JANUARY 4, 2010, CURRENTLY REGISTERED IN OR ORIGINALLY SOLD IN CONNECTICUT, DELAWARE, ILLINOIS, INDIANA, KENTUCKY, MAINE, MARYLAND, MASSACHUSETTS, MICHIGAN, MINNESOTA, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, VERMONT, WASHINGTON DISTRICT OF COLUMBIA, VIRGINIA, WEST VIRGINIA, AND WISCONSIN. THE SUBJECT VEHICLES ARE EQUIPPED WITH THE SPARE TIRE STOWED UNDER THE VEHICLE. IF THE VEHICLE IS OPERATED IN THE COLD CLIMATE REGIONS OF THE UNITED STATES WHERE ROAD SALT IS FREQUENTLY USED, WATER SPLASHED BACKWARDS WITH HIGH CONCENTRATIONS OF ROAD SALT CAN REACH THE SPARE TIRE CARRIER AND CORRODE THE SPARE TIRE CARRIER ASSEMBLY CABLE.
Consequence & remedy
Consequence: THE CABLE MAY BREAK DUE TO EXCESSIVE CORROSION AND THE SPARE TIRE MAY SEPARATE FROM THE VEHICLE, POSSIBLY RESULTING IN A VEHICLE CRASH.
Remedy: TOYOTA WILL NOTIFY OWNERS WITH AN INTERIM LETTER INITIALLY INSTRUCTING THEM TO BRING THEIR VEHICLE TO AUTHORIZED DEALERS TO INSPECT FOR CORROSION. A SECOND NOTICE WILL BE SENT WHEN THE PERMANENT REMEDY IS AVAILABLE. FOR MORE INFORMATION, PLEASE SEE TOYOTA'S AMENDED RECALL REPORT OF JULY 19, 2010. THE SAFETY RECALL IS EXPECTED TO BEGIN ON OCTOBER 12, 2010. OWNERS MAY CONTACT TOYOTA AT 1-800-331-4331.
Mar 5, 2001
VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE FRONT SUB FRAME ASSEMBLY HAS NOT BEEN ADEQUATELY WELDED.
Consequence & remedy
Consequence: THIS CONDITION COULD CAUSE FAILURE OF THE ASSEMBLY FOLLOWING LONG-TERM USAGE, INCREASING THE RISK OF A CRASH.
Remedy: DEALERS WILL INSPECT AND REPLACE THE FRONT SUB FRAME, IF NECESSARY. OWNER NOTIFICATION BEGAN APRIL 9, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT TOYOTA AT 1-800-331-4331.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗