89 owner complaints to NHTSA about the 2004 Toyota Prius cite engine and engine cooling, 15% of all 610 complaints for this model year. NHTSA also lists 1 recall on this component.
“I WAS DRIVING ON THE FREEWAY AT ABOUT 63 MILES PER HOUR, I HAD BEEN DRIVING FOR ABOUT 20 MINUTES WHEN MY ENGINE CUT OUT, ALL THE LIGHTS ON MY DASH TURNED ON INCLUDING THE CHECK ENGINE AND RED TRIANGLE WARNING LIGHT. I DRIFTED TO THE SHOULDER AND POWERED THE CAR OFF. I TRIED TO START IT 2 MORE TIMES, BOTH TIMES THE ENGINE DID NOT START AND THE RED TRIANGLE AND THE CHECK ENGINE LIGHTS CAME ON AGAIN. I WAITED LONGER AND TRIED TO POWER UP THE ENGINE AGAIN, IT STARTED WITH THE CHECK ENGINE LIGHT ON. I TOOK IT TO THE DEALERSHIP 3 DAYS LATER (THEY COULD NOT SEE ME SOONER), RAN THE CODES AND IT ONLY CAME UP WITH THE CODE POAOF, WHICH MEANS THAT THE ENGINE DID NOT START. THEY HAD NO EXPLANATION OF WHAT HAPPENED AND DID NOT SEEM TO SHARE MY CONCERN THAT THIS COULD HAPPEN AGAIN. THE DID RECALL WORK FOR ME AND SENT ME HOME. *TR”
“DRIVING HOME AT NIGHT ON THE 405 FREEWAY AT APPROX. 65MPH, SUDDENLY ALL THE DASH WARNING LIGHTS ILLUMINATED, INCLUDING THE MIL SYMBOL, ALONG WITH A WARNING SYMBOL ON THE NAVIGATION SCREEN. I PULLED OFF THE FREEWAY AND PARKED AT THE CURB. AFTER CHECKING THE OWNERS MANUAL, I SLOWLY DROVE THE REST OF THE WAY HOME ON SURFACE STREETS. THE NEXT MORNING (MONDAY) I DROVE MY CAR TO MILLER TOYOTA IN CULVER CITY. THE PRIMARY DIAGNOSIS WAS FAILURE OF THE INVERTER COOLANT PUMP, WHICH WAS REPLACED UNDER THE TERMS OF MY TOYOTA PLATINUM EXTENDED WARRANTY. HOWEVER, UPON FURTHER RESEARCH, I DISCOVERED THAT TOYOTA HAD ISSUED A TECHNICAL SERVICE BULLETIN (TSB) COVERING THIS VERY PART, ON JANUARY 26, 2007, INDICATING THAT THEY WERE AWARE OF THIS FAILURE-PRONE PART, AND THAT AN "IMPROVED" REPLACEMENT ASSEMBLY WAS NOW AVAILABLE TO ADDRESS THE ISSUE. IN ADDITION, REPLACEMENT WOULD BE COVERED UNDER THEIR 5-YEAR/60,000 MILE TOYOTA POWERTRAIN WARRANTY. APPROXIMATELY ONE MONTH LATER, ON MAY 15, 2010, WHILE DRIVING MY FATHER'S 2004 PRIUS TO HAVE NEW TIRES INSTALLED, THE SAME SEQUENCE OF EVENTS OCCURRED. I IMMEDIATELY DROVE THE VEHICLE TO THE NEAREST DEALER, SANTA MONICA TOYOTA, WHERE IT…”
“FAILURE OF INVERTER COOLANT PUMP OCCURRED WITHOUT WARNING DURING NORMAL DRIVING CONDITIONS. THIS IS APPARENTLY A COMMON PROBLEM OCCURRING AT MANY DIFFERENT MILEAGE INTERVALS FOR OTHER OWNERS. IMMEDIATE SIGNIFICANT LOSS OF POWER AND SEVERAL WARNING LIGHTS ILLUMINATED. CRUISE CONTROL AND A/C WENT OFFLINE. REQUIRES REPLACEMENT WHICH IN THIS INSTANCE WAS $605.00. *TR”
“TL*THE CONTACT OWNS A 2004 TOYOTA PRIUS HYBRID. WHILE DRIVING APPROXIMATELY 60 MPH, THE CHECK ENGINE WARNING LIGHT, AND AN UNKNOWN WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE DEALER WAS NOTIFIED AND ADVISED THE VEHICLE WAS SAFE TO DRIVE; UNLESS THE TEMPERATURE, BRAKE OR OIL WARNING LIGHTS ILLUMINATED. THE VEHICLE BEGAN TO LOSE POWER AND THE ANTI-LOCK BRAKE SYSTEM WARNING LIGHT ILLUMINATED. THE VEHICLE WAS MANEUVERED TO THE SIDE OF THE HIGHWAY. THE VEHICLE WAS TOWED TO THE DEALER. THE FAILURES WERE RELATED TO THE INVERTER WATER PUMP AND THE SKID CONTROL ELECTRONIC CONTROL UNIT (ECU). THE INVERTER WATER PUMP WAS REPLACED. THE FAILURE OCCURRED A SECOND TIME. THE VEHICLE WAS REPAIRED FOR THE MALFUNCTION. THE FAILURE AND CURRENT MILEAGES WERE 61,000.”
“WE OWN A 2004 TOYOTA PRIUS. ON 02/18/2010 IT LOST POWER ON THE ROAD, MAJOR MALFUNCTION LIGHTS CAME ON, AMONG OTHERS, AND HAD TO BE TOWED TO THE TOYOTA DEALER IN CARLSBAD, CA. AFTER DIAGNOSING THE PROBLEM, THEY SAID THE COMPUTER HAD FAILED AND NEEDED TO BE REPLACED. WHEN THE COMPUTER WAS REPLACED IT STARTED TRANSMITTING NEW PROBLEM CODES, NAMELY, POA94, POA78, PO279, AND PO555, WHICH MEANT THAT THE TRANSAXLE HAD FAILED, AND COMPUTER CODES SHOW THAT THE INVERTER COULD FAIL ALSO. TOTAL REPAIR COST: $5,594.00 SO FAR. IF THE INVERTER FAILS, IT WOULD BE A TOTAL OF $9,843.00 TO REPAIR. I DON'T SEE WHO WOULD PAY THIS EXORBITANT AMOUNT, LET ALONE BEING ABLE TO AFFORD IT. THE SAME INCIDENT OCCURRED ON 09/15/2008. THE PRIUS HAD LOST POWER AND WE TOOK IT IN TO THE DEALER. THEY PERFORMED A DIAGNOSTICS TEST, TEST DROVE THE VEHICLE ON THE FREEWAY FOR 9 MILES, IT RAN O.K. AND NO COMPUTER TROUBLE CODES WERE FOUND AT THE TIME. THIS SOUNDS LIKE IT WAS A PRELUDE TO THE VEHICLE FAILURE WERE ARE EXPERIENCING TODAY, AND WE ARE SUSPECTING IT HAS TO DO WITH THE ELECTRONIC SYSTEM. AS IT STANDS NOW, THE PRIUS IS SITTING AT THE TOYOTA DEALER. THEY HAD REMOVED THE NEW COMPUTER IN LIGHT OF…”
“2004 PRIUS: AFTER DRIVING AT 10MPH ON GRAVEL ROAD WITH POTHOLES AND THEN TURNING ON TO SMOOTH PAVED ROAD ENGINE SPEED AND SPEEDOMETER STARTED TO VARY WILDLY WITH SPEEDOMETER GOING UP TO 45MPH DOWN AND BACK UP AGAIN FOR A 5 MINUTE PERIOD WHILE DRIVING ON THE PAVED ROAD AT ABOUT 30MPH. THIS CONTINUED BUT CAR ITSELF DID NOT ACCELERATE ABNORMALLY DESPITE CHANGE IN ENGINE SPEED AND WILD SPEEDOMETER. *TR”
Showing 6 of 89 reports. Read every report on NHTSA.gov.
Toyota is recalling certain model year 2004-2009 Prius vehicles manufactured August 6, 2003, through March 30, 2009 and FCHV-adv vehicles manufactured December 12, 2008, through September 13, 2011. During manufacturing, a scratch may have occurred inside of the electrically driven water pump at the coil wire. The coil wire may corrode at the scratched portion.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.