NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
66 reportsClear category filter98,000 miles · Jan 15, 2004
Engine And Engine Cooling
SLUDGE IN THE ENGINE. VAN IS IN THE SHOP AS WE SPEAK. DEALER SAYS THE REPAIRS WILL BE COVERED BUT WHO IS GOING TO COVER OUR LOSE WHEN WE TRY TO SELL THIS VAN WITH THE PILE OF CRAP FOR AN ENGINE? I SAT IN THE OFFICE OF THE SERVICE MANAGER AND LISTEN TO HIM SIDE-STEP THE PROBLEM UNITL I COULD TAKE NO MORE. I THEN QUESTIONED HIM …
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SLUDGE IN THE ENGINE. VAN IS IN THE SHOP AS WE SPEAK. DEALER SAYS THE REPAIRS WILL BE COVERED BUT WHO IS GOING TO COVER OUR LOSE WHEN WE TRY TO SELL THIS VAN WITH THE PILE OF CRAP FOR AN ENGINE? I SAT IN THE OFFICE OF THE SERVICE MANAGER AND LISTEN TO HIM SIDE-STEP THE PROBLEM UNITL I COULD TAKE NO MORE. I THEN QUESTIONED HIM ABOUT ANY OTHER ISSUES WITH A 2000 SIENNA AND HE LOOKED ME RIGHT IN THE EYES AND SAID NO. NO, UNTIL I QUESTIONED HIM ABOUT THE ADDTIONAL DRIVE TRAIN PROBLEM AT WHICH TIME HIS RESPONSE WAS, "OH, UM, YEAH WE DID JUST RECIEVE A LETTER AN THAT". TOYOTA AND THE DEALERS SHOULD BE HELD ACCOUNTABLE LIKE A LOW-LIFE CON ARTIST THAT SWINDLE AND SCAM PEOPLE. I PAID MY VAN OFF THREE WEEKS AGO AND I'M SITTING HERE LOOKING AT A WORTHLESS DOCUMENT THAT IS THE TITLE. AS SOON AS MY VAN GETS OUT OF THE SHOP I'M FIXING TO SPREAD THE WORD AROUND HERE ABOUT WHAT A CRAPPY DEAL THIS IS. DO THE SAME IN YOUR TOWN TOO.
NHTSA ODI #10070511
Mileage unknown · Jan 15, 2004
Engine And Engine Cooling
ENGINE SLUDGE PROBLEM. TOYOTA IS FIXING (ALTHOUGH I THINK THEY SHOULD REPLACE IT) IT ONE TIME. THEY WILL NOT FIX IT A SECOND TIME REGARDLESS OF SERVICE RECORDS. THIS IS TOTALLY UNACCEPTABLE. WE ARE ALSO CONCERNED THAT THE RESALE VALUE OF THE VAN WILL BE GREATLY REDUCED.
NHTSA ODI #10069511
36,449 miles · Jan 15, 2004
Engine And Engine Cooling
DESLUDGE ENGINE, REPLACE VALVE STEM SEALS AND CLEAN OUT OIL PAN. CLEANED ENGINE BUT MY CONCERN IS THAT THEY HAVE NOT FIXED THE ROOT CAUSE. WANT THE ENGINE PROBLEM FIXED NOT JUST CLEANED.
NHTSA ODI #10069040
107,650 miles · Oct 27, 2003
Engine And Engine Cooling
AT 107,000 MILES WHILE DRIVING THE MOTOR JUST CUT OFF. THEN WOULD NOT START. I ALWAYS HAVE CHANGED THE OIL AT EVERY 3000 MILES. NOW MY MECHANIC SAYS THAT THE CAMSHAFT BROKE. THERE CAN BE NO OTHER ANSWER THAN THAT THIS ENGINE WAS A SLUDGE DEFECTIVE MOTOR FROM THE MANUFACTURER. *AK
NHTSA ODI #10043663
Mileage unknown · Aug 6, 2003
Engine And Engine CoolingPower TrainSteering
PROBLEMS WITH TIRE WEAR, TRANSMISSION AND POWER STEERING PUMP. THE VEHICLE IS ON IT'S FOURTH SET OF TIRES AT 45,000 MILES DUE TO TRACKING PROBLEM. THERE WAS A WHINE COMING FROM THE TORQUE CONVERTER PUMP. THE TRANSMISSION SHIFTED TO NEUTRAL ON THREE OCCASIONS. THE DEALER NEVER MENTIONED THERE WAS EARLY SLUDGE BUILDING UP IN THE …
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PROBLEMS WITH TIRE WEAR, TRANSMISSION AND POWER STEERING PUMP. THE VEHICLE IS ON IT'S FOURTH SET OF TIRES AT 45,000 MILES DUE TO TRACKING PROBLEM. THERE WAS A WHINE COMING FROM THE TORQUE CONVERTER PUMP. THE TRANSMISSION SHIFTED TO NEUTRAL ON THREE OCCASIONS. THE DEALER NEVER MENTIONED THERE WAS EARLY SLUDGE BUILDING UP IN THE OIL. THE ENGINE MADE NOISE AND VIBRATED. DEALER NOTIFIED. *MR *CB *JB
NHTSA ODI #10032229
Mileage unknown · Jun 19, 2003
Electrical SystemEngine And Engine CoolingService Brakes, Hydraulic
LTR FWD FM FHWA RE THEIR DEFECTIVE 2000 TOYOTA SIENNA XLE, THE VAN HAS PROBLEMS WITH ENGINE SLUDGE...*MR THE VEHICLE STARTED TO BLOW BLUE SMOKE AND RAN ROUGH. THE DEALER DISCOVERED ENGINE GEL DEPOSITS. THE MALFUNCTIONING LIGHT HAD COME ON DUE TO THE OXYGEN SENSOR PER DEALER, THE BRAKES SQUEALED WHEN STOPPED AT LOW SPEEDS(PROB…
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LTR FWD FM FHWA RE THEIR DEFECTIVE 2000 TOYOTA SIENNA XLE, THE VAN HAS PROBLEMS WITH ENGINE SLUDGE...*MR THE VEHICLE STARTED TO BLOW BLUE SMOKE AND RAN ROUGH. THE DEALER DISCOVERED ENGINE GEL DEPOSITS. THE MALFUNCTIONING LIGHT HAD COME ON DUE TO THE OXYGEN SENSOR PER DEALER, THE BRAKES SQUEALED WHEN STOPPED AT LOW SPEEDS(PROBLEM CONTINUED), AND PULLED TO THE LEFT. THE DEALER COULD NOT DUPLICATE. THE ENGINE SLUDGE HAD COME BACK AGAIN DUE TO A BURNT HOLE IN THE VALVE WHICH WAS IN THE PISTON. THE TACHOMETER ILLUMINATION APPEARED TO BE OUT AND THE BULB WAS REPLACED. THE CONSUMER REQUESTED REIMBURSEMENT FOR THE HOTEL STAY AND THE VEHICLE RENTAL. *SCC *JB
NHTSA ODI #10024415
Mileage unknown · Jun 18, 2003
Engine And Engine CoolingPower TrainTires
LTR FWD FM FHWA RE HIS DEFECTIVE 2000 TOYOTA SIENNA XLE THAT EMITS A LOUD BEARING WHINE, THE TRANSMISSION RANDOMLY SHIFTED INTO NEUTRAL. THE TIRES WERE REPLACED 3 TIMES DUE TO TRACKING & PULLING PROBLEMS. *MR THE CONSUMER WAS TOLD BY THE REP THAT 31K MILES ON A MICHELIN WAS ALL TO EXPECT ON THIS VEHICLE. THE VEHICLE WAS ON IT…
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LTR FWD FM FHWA RE HIS DEFECTIVE 2000 TOYOTA SIENNA XLE THAT EMITS A LOUD BEARING WHINE, THE TRANSMISSION RANDOMLY SHIFTED INTO NEUTRAL. THE TIRES WERE REPLACED 3 TIMES DUE TO TRACKING & PULLING PROBLEMS. *MR THE CONSUMER WAS TOLD BY THE REP THAT 31K MILES ON A MICHELIN WAS ALL TO EXPECT ON THIS VEHICLE. THE VEHICLE WAS ON IT'S FOURTH SET OF TIRES AT 55K MILES. THE TRACKING PROBLEMS WERE RESOLVED ON THE TWO SETS OF FOUR WITHIN THE FIRST 15K MILES. THE VEHICLE DOWNSHIFTED WHEN GOING BETWEEN THE SECOND AND THIRD GEARS. THERE WERE RESULTS FORM AN ENGINE OIL ANALYSIS THAT MAY INDICATE EARLY SLUDGE BUILD UP. *SCC *JB
NHTSA ODI #10024281
30,500 miles · May 14, 2003
Engine And Engine Cooling
I OWN A 2000 TOYOTA SIENNA LE. I NOTICED A COOLANT LEAK. I TOOK IT IN TO A TOYOTA DEALER AND DISCOVERED THE PROBLEM WAS THE LEAK FROM THE COOLING PIPE. THE CAUSE OF THE PROBLEM WAS THE COOLING PIPE WAS RUBBING AGAINST THE POWER STEERING LINE (ACCORDING TO THE SERVICE ADVISOR) AND THE COOLING PIPE WORE OUT. I ASKED IF IT WAS …
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I OWN A 2000 TOYOTA SIENNA LE. I NOTICED A COOLANT LEAK. I TOOK IT IN TO A TOYOTA DEALER AND DISCOVERED THE PROBLEM WAS THE LEAK FROM THE COOLING PIPE. THE CAUSE OF THE PROBLEM WAS THE COOLING PIPE WAS RUBBING AGAINST THE POWER STEERING LINE (ACCORDING TO THE SERVICE ADVISOR) AND THE COOLING PIPE WORE OUT. I ASKED IF IT WAS A DESIGN FLAW. HE REPLIED THAT HE NEVER SAW THIS BEFORE, BUT THERE SHOULD BE SOMETHING BETWEEN THE COOLING PIPE AND THE POWER STEERING LINE TO PREVENT THE RUBBING. THIS FIX IS $410 FOR PARTS AND LABOR AND IS NOT COVER UNDER THE EXTENDED WARRANTY SINCE IT IS A PIPE THAT BROKE. I FEEL LIKE THIS IS A DESIGN FLAW BY TOYOTA. *NLM
NHTSA ODI #10018701
48,988 miles · Apr 11, 2003
Engine And Engine CoolingService Brakes, Hydraulic
THE ENGINE DEVELOPED ENGINE GEL DEPOSITS, THE OXYGEN SENSOR AND THE BRAKES SQUEAKED. *AK *JB *TS
NHTSA ODI #10015296
Mileage unknown · Mar 27, 2003
Engine And Engine CoolingPower TrainTires
THERE WERE PROBLEMS WITH TRANSMISSION AND TIRE EQUIPMENT. MR THE VEHICLE WAS ON IT'S FOURTH SET OF TIRES DUE TO A TRACKING PROBLEM. THERE WAS A WHINE COMING FROM THE TORQUE CONVERTER PUMP. THE TRANSMISSION SHIFTED TO NEUTRAL ON THREE OCCASIONS. DEALER SAW INDICATIONS OF EARLY SLUDGE BUILD UP IN THE OIL. THE ENGINE MADE NOI…
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THERE WERE PROBLEMS WITH TRANSMISSION AND TIRE EQUIPMENT. MR THE VEHICLE WAS ON IT'S FOURTH SET OF TIRES DUE TO A TRACKING PROBLEM. THERE WAS A WHINE COMING FROM THE TORQUE CONVERTER PUMP. THE TRANSMISSION SHIFTED TO NEUTRAL ON THREE OCCASIONS. DEALER SAW INDICATIONS OF EARLY SLUDGE BUILD UP IN THE OIL. THE ENGINE MADE NOISES AND VIBRATED. (DAYTON/GOODYEAR) *SCC *NLM *CB *JB
NHTSA ODI #10014842
Official recalls
1Apr 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.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗