NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
46 reportsClear category filterMileage unknown · Dec 9, 2010
Engine And Engine CoolingVisibility
2003 TOYOTA HIGHLANDER 4.0 HEATER HAS GONE OUT IN THIS VEHICLE AND ONLY THE A/C NOW WORKS THIS HAPPENED RIGHT AFTER THE PURCHASE OF THIS VEHICLE AND THE COST TO FIX THIS IS VERY HIGH AND SHOULD BE DEALT WITH PER TOYOTA SINCE IT SEEMS ALOT OF OTHERS ARE ALSO HAVING THE PROBLEM DUE TO A FAULTY KNOB BECOMING LOOSE AND BREAKING A TI…
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2003 TOYOTA HIGHLANDER 4.0 HEATER HAS GONE OUT IN THIS VEHICLE AND ONLY THE A/C NOW WORKS THIS HAPPENED RIGHT AFTER THE PURCHASE OF THIS VEHICLE AND THE COST TO FIX THIS IS VERY HIGH AND SHOULD BE DEALT WITH PER TOYOTA SINCE IT SEEMS ALOT OF OTHERS ARE ALSO HAVING THE PROBLEM DUE TO A FAULTY KNOB BECOMING LOOSE AND BREAKING A TINY WIRE. *TR
NHTSA ODI #10369768
126,000 miles · Dec 1, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2003 TOYOTA HIGHLANDER. THE VEHICLE HAD A HEAD GASKET WATER LEAK. THE VEHICLE WAS TAKEN TO THE DEALER WHO STATED THAT THE HEAD GASKET WAS BLOWN AND IT WOULD COST $2500 TO BE REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE 126,000.
NHTSA ODI #10368468
95,500 miles · Nov 17, 2010
Engine And Engine Cooling
MY 2003 TOYOTA HIGHLANDER'S TEMP GAUGE STARTED GOING TOWARD THE H WHILE DRIVING ABOUT 30 MPH. I TURNED THE HEAT ON IN THE CAR AND THAT MADE THE GAUGE GO BACK DOWN TO NORMAL. I TOOK THE CAR TO A TOYOTA DEALERSHIP WHERE I WAS TOLD MY HEAD GASKET WAS BLOWN AND I NEEDED A NEW ENGINE FOR ABOUT $8000! I TOOK THE CAR TO AN INDEPENDEN…
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MY 2003 TOYOTA HIGHLANDER'S TEMP GAUGE STARTED GOING TOWARD THE H WHILE DRIVING ABOUT 30 MPH. I TURNED THE HEAT ON IN THE CAR AND THAT MADE THE GAUGE GO BACK DOWN TO NORMAL. I TOOK THE CAR TO A TOYOTA DEALERSHIP WHERE I WAS TOLD MY HEAD GASKET WAS BLOWN AND I NEEDED A NEW ENGINE FOR ABOUT $8000! I TOOK THE CAR TO AN INDEPENDENT MECHANIC THAT TOLD ME THE ENGINE ITSELF WAS FINE BUT 3 BOLTS ON THE HEAD GASKET WERE STRIPPED. THE REPAIR IS COSTING AN APPROXIMATE $2500 TO RETAP THE HOLES AND USE DIFFERENT BOLTS. I HAD DONE SOME RESEARCH AND I FOUND OUT THAT THIS IS A KNOWN PROBLEM WITH THE 2003 HIGHLANDERS AND TOYOTA IS NOT DOING ANYTHING ABOUT IT (I HAVE THE WEBSITE INFO AND COMPLAINTS IF NEEDED). MANY PEOPLE WHO HAVE PURCHASED THIS YEAR/MAKE/MODEL HAVE SPENT THOUSANDS OF DOLLARS REPAIRING THIS DEFECT THAT TOYOTA KNOWS ABOUT BUT WILL NOT TAKE CARE OF. I CALLED TOYOTA NATIONAL CUSTOMER SERVICE AND THEY GAVE ME THIS WEBSITE INFORMATION TO FILE A COMPLAINT (I HAVE A CLAIM NUMBER IF YOU NEED IT). I AM VERY UPSET, ACTUALLY OUTRAGED, THAT HERE WE ARE AGAIN FINDING OUT THAT TOYOTA HAS MORE ISSUES WITH THEIR VEHICLES AND WON'T DO ANYTHING ABOUT IT. I BOUGHT THIS CAR BECAUSE I THOUGHT TOYOTAS WERE RELIABLE. PLEASE DO SOMETHING ABOUT THIS AND HELP ALL OF US WHO BOUGHT THE 2003 HIGHLANDERS RECOVER THE MONEY WE HAVE SPENT ON REPAIRS TO AN OBVIOUS MANUFACTURER'S DEFECTIVE PART USAGE. THANK YOU! *TR
NHTSA ODI #10366566
109,171 miles · Nov 3, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2003 TOYOTA HIGHLANDER. WHILE DRIVING APPROXIMATELY 65 MPH WITH THE AIR CONDITIONER ON SHE NOTICED HOT AIR BEGAN TO FLOW FROM THE VENTS. SHE ALSO NOTICED THAT THE TEMPERATURE GAUGE MALFUNCTIONED. THE VEHICLE WAS DRIVEN ONTO THE EMERGENCY LANE AND SHUT OFF WHILE SHE ADDED COOLANT TO THE ENGINE. THE VEHICLE …
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TL*THE CONTACT OWNS A 2003 TOYOTA HIGHLANDER. WHILE DRIVING APPROXIMATELY 65 MPH WITH THE AIR CONDITIONER ON SHE NOTICED HOT AIR BEGAN TO FLOW FROM THE VENTS. SHE ALSO NOTICED THAT THE TEMPERATURE GAUGE MALFUNCTIONED. THE VEHICLE WAS DRIVEN ONTO THE EMERGENCY LANE AND SHUT OFF WHILE SHE ADDED COOLANT TO THE ENGINE. THE VEHICLE WAS THEN TAKEN TO AN AUTHORIZED DEALER WHERE SHE WAS INFORMED THAT THERE WAS AN ENGINE LEAK AND SOME OF THE BOLTS WERE LOOSE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 109,171. THE CURRENT MILEAGE WAS 110,000.
NHTSA ODI #10363877
110,000 miles · Nov 3, 2010
Engine And Engine Cooling
2003 TOYOTA HIGHLANDER WITH 110,000 MILES STARTED TO OVERHEAT AND LOSE COOLANT. TOOK IT TO DEALERSHIP AND LEARNED THAT THE CYLINDER HEAD BOLTS HAD COME LOOSE DUE TO THE HOLES IN THE BLOCK BEING STRIPPED. TOYOTA ESTIMATED $3000 TO TAKE THE BLOCK OUT TO A MACHINIST TO BORE NEW HOLES, BUT IF THAT DIDN'T WORK IT WOULD COST $6000 TO …
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2003 TOYOTA HIGHLANDER WITH 110,000 MILES STARTED TO OVERHEAT AND LOSE COOLANT. TOOK IT TO DEALERSHIP AND LEARNED THAT THE CYLINDER HEAD BOLTS HAD COME LOOSE DUE TO THE HOLES IN THE BLOCK BEING STRIPPED. TOYOTA ESTIMATED $3000 TO TAKE THE BLOCK OUT TO A MACHINIST TO BORE NEW HOLES, BUT IF THAT DIDN'T WORK IT WOULD COST $6000 TO REPLACE THE BLOCK. I THEN TOOK THE CAR TO A PRIVATE MECHANIC WHO SAID IT WOULD COST $9600 TO TAKE OUT THE BLOCK AND SEND TO MACHINIST OR BUY A RE-MANUFACTURED ENGINE FOR $8200. THE PRIVATE MECHANIC STATED THIS PROBLEM IS DUE TO FAULTY MANUFACTURING OF THE ENGINE AND ALSO STATED THAT HE SEES THIS PROBLEM ALL THE TIME IN THESE TYPES OF VEHICLES. ON THE INTERNET I HAVE FOUND CONSUMERS SHARING THE SAME STORIES ABOUT SIMILAR VEHICLES BY TOYOTA WITH SIMILAR ENGINES THAT HAVE THE SAME PROBLEM; SOME ONLY LASTING 70,000 MILES. I PUT IN A CALL WITH TOYOTA HEADQUARTERS AND THEY GAVE ME A REFERENCE NUMBER IN CASE ANY RECALLS SHOULD ARISE. TOYOTA SAID THAT THERE WAS NOTHING THEY COULD DO OUT OF "GOOD FAITH" SINCE IT IS PASSED THE WARRANTY MILEAGE AND SINCE I DID NOT DO ALL MY SERVICING AT TOYOTA. I CHANGED THE OIL EVERY 3,000 MILES AND TOOK VERY GOOD CARE OF THIS VEHICLE AS IT WAS MY FIRST PURCHASE OF A NEW VEHICLE AND I THOUGHT IT WOULD LAST ME A LONG TIME. *TR
NHTSA ODI #10363818
175,000 miles · Oct 28, 2010
Engine And Engine Cooling
THE COOLANT KEPT LEAKING ON MY HIGHLANDER 2003 4 CYLINDER FOR LAST FEW MONTHS. THE TEMPERATURE GAUGE ONE DAY SHOWED HEATING OF ENGINE. TOOK IT TO TOYOTA , THEY SAID IT IS BLOWN HEAD GASKET. DEMANDED $3500. *TR
NHTSA ODI #10362826
108,000 miles · Oct 6, 2010
Engine And Engine Cooling
2003 TOYOTA HIGHLANDER 2.4L 4-CYLINDER ENGINE, 108,000 MILES, DEVELOPED COOLANT LEAK ON THE BACK SIDE OF THE TOP OF THE ENGINE, ADJACENT TO AN INSULATOR PAD AT THE BACK OF THE ENGINE BLOCK. THE BACK 3 HEAD BOLTS WERE STRIPPED, ALLOWING COOLANT TO ALSO LEAK INTO THE ENGINE. THE TOYOTA DEALER SAYS THAT THE SHORT BLOCK OR ENTIRE EN…
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2003 TOYOTA HIGHLANDER 2.4L 4-CYLINDER ENGINE, 108,000 MILES, DEVELOPED COOLANT LEAK ON THE BACK SIDE OF THE TOP OF THE ENGINE, ADJACENT TO AN INSULATOR PAD AT THE BACK OF THE ENGINE BLOCK. THE BACK 3 HEAD BOLTS WERE STRIPPED, ALLOWING COOLANT TO ALSO LEAK INTO THE ENGINE. THE TOYOTA DEALER SAYS THAT THE SHORT BLOCK OR ENTIRE ENGINE MUST BE REPLACED, WITH NO OTHER OPTION. THE HEAD HAD NEVER BEEN OFF SINCE ORIGINAL FACTORY MANUFACTURE/ASSEMBLY. BASED ON THE FREQUENCY OF IDENTICAL ENGINE FAILURES, FAULTY ASSEMBLY AND/OR DESIGN ASSURES EVENTUAL FAILURE OF THE ENGINE. *TR
NHTSA ODI #10359418
123,073 miles · Sep 20, 2010
Engine And Engine Cooling
2003 TOYOTA HIGHLANDER HAS HEAD BOLTS STRIPPED FROM BLOCK, CAUSING FLUID TO SLOWLY LEAK FROM ENGINE AND OVERHEAT. FIRST SYMPTOM IS AC BLOWS HOT AIR. MOST FOLKS WHO EXPERIENCE THIS BURN UP THE ENGINE, BUT I WAS FORTUNATE AND WAS ABLE TO HAVE IT REPAIRED AT A COST OF $2750.00 !!!!! THIS IS A CLEAR DEFECT, HEAD BOLTS DO NOT SIMPLY…
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2003 TOYOTA HIGHLANDER HAS HEAD BOLTS STRIPPED FROM BLOCK, CAUSING FLUID TO SLOWLY LEAK FROM ENGINE AND OVERHEAT. FIRST SYMPTOM IS AC BLOWS HOT AIR. MOST FOLKS WHO EXPERIENCE THIS BURN UP THE ENGINE, BUT I WAS FORTUNATE AND WAS ABLE TO HAVE IT REPAIRED AT A COST OF $2750.00 !!!!! THIS IS A CLEAR DEFECT, HEAD BOLTS DO NOT SIMPLY GET STRIPPED FROM A BLOCK. *TR
NHTSA ODI #10356658
97,000 miles · Sep 12, 2010
Electronic Stability Control (esc)Engine And Engine CoolingService Brakes, Hydraulic
VSC (VEHICLE STABILITY CONTROL, INCLUDING ABS) & CHECK ENGINE LIGHTS HAVE BEEN TURNING ON INTERMITTENTLY ALMOST FROM THE START OF OUR OWNERSHIP OF THIS 2003 TOYOTA HIGHLANDER V6 AWD LIMITED AND AFTER COSTLY REPAIRS AT THE DEALER THEY ARE STILL ON CONTINUOUSLY. LAST TIME (MAY-JUNE 2010) DEALER REPLACED FRONT BRAKE PADS & ROT…
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VSC (VEHICLE STABILITY CONTROL, INCLUDING ABS) & CHECK ENGINE LIGHTS HAVE BEEN TURNING ON INTERMITTENTLY ALMOST FROM THE START OF OUR OWNERSHIP OF THIS 2003 TOYOTA HIGHLANDER V6 AWD LIMITED AND AFTER COSTLY REPAIRS AT THE DEALER THEY ARE STILL ON CONTINUOUSLY. LAST TIME (MAY-JUNE 2010) DEALER REPLACED FRONT BRAKE PADS & ROTORS; REAR AXLES AND SPEED SENSORS AND NOW WANTS TO REPLACE ADDITIONAL COMPONENTS THAT DO NOT APPEAR CONNECTED. FIRST TIME CAR WAS SERVICED UNDER WARRANTY AT DEALER AND THAT TOO DID NOT LAST FOR LONG. TOYOTA CAR SATISFACTION CENTER HAS NOT BEEN HELPFULL. CASE # [XXX]. FORD HAS ISSUED A RECALL FOR SIMILAR ISSUE RECENTLY: 10S13 FOR REAR AXLE BREAKAGE IN THE SNOW BELT! TOYOTA REFUSES TO ACKNOWLEDGE ISSUE AND INTERNET HAS MANY DISCUSSIONS ON TOPIC. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
NHTSA ODI #10355107
155,000 miles · Aug 17, 2010
Engine And Engine Cooling
TL-* THE CONTACT OWNS A 2003 TOYOTA HIGHLANDER. WHILE TRAVELING 55 MPH, THE CONTACT NOTICED THAT THE TEMPERATURE GAUGE WAS INDICATING THAT THE VEHICLE WAS RUNNING HOT. AFTER EXAMINING THE VEHICLE, THE CONTACT DISCOVERED COOLANT LEAKING FROM THE REAR OF THE CYLINDER BLOCK. THE VEHICLE WAS TAKEN TO A LOCAL MECHANIC WHERE Z TAPS WE…
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TL-* THE CONTACT OWNS A 2003 TOYOTA HIGHLANDER. WHILE TRAVELING 55 MPH, THE CONTACT NOTICED THAT THE TEMPERATURE GAUGE WAS INDICATING THAT THE VEHICLE WAS RUNNING HOT. AFTER EXAMINING THE VEHICLE, THE CONTACT DISCOVERED COOLANT LEAKING FROM THE REAR OF THE CYLINDER BLOCK. THE VEHICLE WAS TAKEN TO A LOCAL MECHANIC WHERE Z TAPS WERE INSTALLED INSIDE OF THE ENGINE. THE CURRENT AND FAILURE MILEAGE WAS 155,000.
NHTSA ODI #10350019