2004 Toyota Prius complaints

ABOUT 40% OF THE TIME, MY TOYOTA PRIUS DOESN'T WANT TO STOP OR SLOW DOWN WHEN THE BRAKES ARE APPLIED. UNDER THESE CONDITIONS, I HAVE TO APPLY THE BRAKES HARD AND THEN THE CAR WILL SLOW DOWN. IT FEELS LIKE THE CAR WANTS TO "RUN AWAY" WHEN THE BRAKES ARE APPLIED. IT EXHIBITS THIS BEHAVIOR IN MANY CIRCUMSTANCES: STOPPING AT A STOP LIGHT, SLOWING DOWN ON AN EXPRESSWAY, OR SLOWING DOWN ON A CITY STREET. *TR UPDATED 11/23/09 *BF THE CHECK ENGINE LIGHT ILLUMINATED. THE PASSENGER FRONT WINDOW SWITCH WASN'T OPENING OR CLOSING THE WINDOW UNLESS THE MASTER SWITCH WAS USED. THE THROTTLE BODY HAD TO BE CLEANED. THE FAN BELT AND BRAKE LIGHT SWITCH WERE REPLACED. UPDATED 11/24/09 UPDATED 01/06/10 *BF UPDATED 01/07/10.*JB

I WROTE THIS AGENCY A FEW MONTHS AGO REGARDING MY 2004 TOYOTA PRIUS AND THE PROBLEMS I WAS HAVING WITH HEADLIGHTS ALTERNATING ON/OFF. TURNING THE LIGHT SWITCH ON/OFF WOULD TURN IT BACK ON. THREE OR FOUR MONTHS AGO BOTH LIGHTS STARTED GOING OUT AT THE SAME TIME. TURNING THE LIGHT SWITCH ON/OFF INTERMITTENTLY 5-9 TIMES MAKES THEM TURN BACK ON. SO FAR I HAVE HAD THIS HAPPEN TO ME 3 TIMES WITHIN THE LAST WEEK TRAVELING 40-55 MILES AN HOUR. I HAVE JUST READ THAT YOU GUYS STOPPED YOUR INVESTIGATION. HOW MANY ACCIDENTS OR DEATHS DO YOU NEED BEFORE ANYTHING IS DONE ABOUT THIS. WHEN HEADLIGHTS BURN OUT THEY DON'T COME BACK ON. THIS IS OBVIOUSLY AN ELECTRICAL OR COMPUTER GLITCH THAT TOYOTA HAS TO BE AWARE OF. IN ALL MY YEARS OF DRIVING, I HAVE NEVER HAD AN EXPERIENCE AS THAT OF EVERYTHING GOING DARK AND JUST HAVING TO HIT THE BRAKES. LUCKILY WHEN IT HAPPENED LAST NIGHT THE CAR BEHIND US SAW OUR BRAKE LIGHTS AND CAME TO A SAFE STOP. THEY FLASHED THEIR HEADLIGHTS NOT KNOWING WHY OUR CAR WAS STOPPED IN THE MIDDLE OF THE ROAD. I REQUEST A REPLY TO THIS COMPLAINT SINCE NO ONE CONTACTED ME ON MY PRIOR COMPLAINT. THANK YOU. *TR

2004 TOYOTA PRIUS - HEADLIGHTS GO OUT INTERMITTENTLY FOR NO APPARENT REASON - NEED TO TURN HEADLIGHTS OFF AND BACK ON IN ORDER TO HAVE THE HEADLIGHT COME BACK ON. AT FIRST, THIS ONLY HAPPENED IN THE LEFT HEADLIGHT, LATELY THE RIGHT HEADLIGHT HAS BEEN HAVING THE PROBLEM, LUCKILY IT HAS NEVER HAPPENED TO BOTH HEADLIGHTS AT THE SAME TIME. WOULD BE PARTICULARLY DANGEROUS IF THIS HAPPENED ON A DARK COUNTRY ROAD! *TR

TL* THE CONTACT OWNS A 2004 TOYOTA PRIUS. WHILE ENTERING AN INTERSTATE HIGHWAY DURING TRAFFIC, THE VEHICLE ACCELERATED WITHOUT INTENTION. SHE SHIFTED THE VEHICLE INTO NEUTRAL AND COASTED TO THE SIDE OF THE ROAD. THE VEHICLE WAS THEN TAKEN TO THE DEALER FOR INSPECTION. A TECHNICIAN CONCLUDED THAT THE FLOOR-MAT WAS THE CAUSE OF THE FAILURE. HOWEVER WHEN THE FAILURE OCCURRED SHE NOTICED THAT THE FLOOR-MAT DID NOT INTERFERE WITH THE ACCELERATOR PEDAL. THE FAILURE MILEAGE WAS UNKNOWN. THE CURRENT MILEAGE WAS 80,000.

MY DAUGHTER OWNS A 2004 TOYOTA PRIUS WITH HID HEADLIGHTS. THE LIGHTS FAIL ONE AT ATIME OR BOTH AT THE SAME TIME. THEY COME BACK ON USUALLY BY TURNING THE SWITCH OFF AND THEN BACK ON, EXCEPT WHEN SHE WAS DRIVING AT NIGHT IN THE FOG, AND THEY DID NOT COME BACK ON. SHE HAD TO PARK AND SPEND THE NIGHT BESIDE THE ROAD, UNTIL DAYLIGHT TO CONTINUE DRIVING HOME. SHE HAS CONTACTED TOYOTA ABOUT THE PROBLEM AND HAS FOUND OUT THAT THE BULBS COST $350 A PIECE AND REQUIRES EXTENSIVE DISMANTLING OF THE CAR TO INSTALL THEM. THIS MEANING THAT A $1000 DOLLAR EXPENSE FOR REPLACING THE BULBS, NOT KNOWING IF THERE IS A DEEPER SEATED PROBLEM WITH THE POWER SUPPLY TO THE HEADLIGHTS. I WAS JUST WONDERING IF THEIR HAS BEEN ANYTHING DONE ABOUT A RECALL? *TR

DRIVING ON BAY BRIDGE, SF, CA AT 10:00 AM GOING 50 MPH. THE FOLLOWING LIGHTS SHOWED ON DASH, CARE LOST ALL BAKING ABILITY. BRAKE LIGHT, ABS LIGHT, EXCLAMATION LIGHT, AND WHINING SOUND. HAD TO USE EMERGENCY BRAKE TO STOP CAR AND HAVE IT TOWED. *TR

TL*THE CONTACT OWNS A 2004 TOYOTA PRIUS. WHEN HE APPLIED PRESSURE ON THE BRAKE PEDAL AT 50 MPH IN THE DARK, THE VEHICLE WOULD NOT STOP. THE ANTI-LOCK BRAKE SYSTEM ACTIVATED, BUT THE VEHICLE DID NOT STOP. CONSEQUENTLY THE VEHICLE CRASHED INTO A TREE. THE VEHICLE WAS COMPLETELY DESTROYED. HE SUSTAINED INJURIES. THE FAILURE MILEAGE WAS 62000. THE VEHICLE IDENTIFICATION NUMBER WAS UNAVAILABLE.

THE INFORMATION SCREEN ON '04 AND '05 TOYOTA PRIUSES FAILS. TOYOTA HAS KNOWN ABOUT THIS FOR SOME TIME (THEIR TECHNICAL SERVICE BULLETIN EL 005-02). NOT ONLY IS IT NO LONGER POSSIBLE TO FULLY CONTROL THE SOUND SYSTEM AND THE HEATING/COOLING CONTROLS, BUT THE NAV SYSTEM NO LONGER OPERATES. AND MOST IMPORTANT FROM A SAFETY POINT OF VIEW, THE WARNING THAT SOUNDS AND SHOWS WHEN A DOOR IS OPENED AND THE TRANSMISSION IS STILL ENGAGED (SOMETHING EASY TO DO IN A PRIUS) NO LONGER OPERATES. NOR DOES A MESSAGE SHOW WHEN THE SYSTEM DETECTS SOMETHING WRONG WITH THE ENGINE MANAGEMENT SYSTEM. NOR DOES THE LOW FUEL MESSAGE SHOW. I HAVE TWO FRIENDS WITH EARLY 2004 PRIUSES AND BOTH OF THEM HAVE HAD THE SAME PROBLEM. THE COST OF A FIX FOR THIS DEFECTIVE PART IS OVER $800! *TR

TL* THE CONTACT OWNS A 2004 TOYOTA PRIUS. WHILE DRIVING APPROXIMATELY 65 MPH THE HEAD-LIGHTS FAILED. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR INSPECTION. THE VEHICLE HAS NOT BEEN REPAIRED AT THIS TIME. THE FAILURE MILEAGE WAS 170,000. THE CURRENT MILEAGE WAS 185,000. THE VEHICLE IDENTIFICATION NUMBER WAS UNAVAILABLE.

HEADLAMPS TURN OFF INTERMITTENTLY. *TR

INTERMITTENT HEADLIGHT FAILURE ON MY 2004 TOYOTA PRIUS, WITH JUST OVER 70,000 MILES. THIS IS TRULY DANGEROUS--SOMEONE IS GOING TO GET KILLED BECAUSE OF THIS. THE PROBLEM SEEMS TO BE WIDESPREAD--WHY HAS THERE NOT BEEN A RECALL? DOES SOMEONE HAVE TO GET KILLED FIRST? *TR

I HAVE A 2004 TOYOTA PRIUS, AND MY LEFT HEADLIGHT HAS TURNED PINK. IT IS NOW CONTINUOUSLY PINK. I WAS TOLD BY MY DEALERSHIP THAT IT WOULD COST $400 TO REPLACE THE HEADLAMP BECAUSE IT IS A XENON HEADLIGHT. MY UNDERSTANDING IS THAT XENON HEADLIGHTS SHOULD LAST LONGER THAN MINE DID. *TR

HEADLIGHTS TURN OFF SPONTANEOUSLY, MUST BE RESTARTED BY TURNING SWITCH ON AND OFF. *TR

2004 TOYOTA PRIUS. DRIVING AT 70 MPH ON I-57 NORTH. WHILE DRIVING THE GASOLINE ENGINE STOPPED FUNCTIONING, TRIGGERING SEVERAL WARNING LIGHTS. I PULLED THE CAR OFF TO THE SIDE OF THE HIGHWAY AND MANAGED TO EXIT THE HIGHWAY ON BATTERY POWER. THERE WAS A RECALL IN 2005 FOR A SIMILAR CONDITION. MY PRIUS HAD THE RECALL WORK PERFORMED IN OCTOBER 2005 FOR THE SOFTWARE PROBLEM. THE TOYOTA DEALER IS UNABLE TO FIND ANY REASON FOR THE PROBLEM AND CAN NOT REPLICATE THE ENGINE FAILURE. AS A RESULT, THEY WILL NOT PERFORM ANY FURTHER INVESTIGATION OR MAINTENANCE ON THE VEHICLE FOR THIS PROBLEM. I HAVE A CASE PENDING WITH TOYOTA CUSTOMER CARE, BUT DO NOT EXPECT ANY FURTHER ASSISTANCE FROM THEM. I AM ALSO BEING CHARGED LABOR FOR THE DEALER TO INSPECT THE VEHICLE. THERE WAS NO FIRE OR PROPERTY DAMAGE, BUT IF I HAD NOT BEEN IN THE RIGHT HAND LANE, I VERY WELL COULD HAVE BEEN IN A SERIOUS ACCIDENT. SUDDENLY LOOSING POWER AT HIGHWAY SPEEDS IS UNACCEPTABLE. IF THEY ARE UNABLE TO REMEDY THE SITUATION, I WILL BE RETURNING THE VEHICLE TO THEM. *TR

HID LIGHTS FAIL IN MY 2004 PRIUS AND HAVE FOR SEVERAL YEARS NOW - INTERMITTENTLY WITH NO WARNING. AT TIMES, BOTH LIGHTS FAIL AT THE SAME TIME, LEAVING ME ON A DARK ROAD UNEXPECTEDLY. I HAVE ONE REPLACED AT THE DEALER, ONLY TO HAVE IT FAIL AGAIN. THIS IS CLEARLY A SAFETY ISSUE. HUNDREDS OF THESE HAVE BEEN REPORTED. *TR

BOTH HEADLIGHTS TURN OFF INTERMITTENTLY AND TWICE BOTH HAVE GONE OUT AT THE SAME TIME WHILE DRIVING. THERE WAS NO WARNING. TO REPLACE ONE HEADLIGHT, TOYOTA OF MELBOURNE TOLD ME IT WOULD BE OVER $600 (LABOR NOT INCLUDED). (BULB AND HARNESS) *TR

AFTER SEVERAL YEARS OF USE, THE HEADLIGHTS, MOST OFTEN THE RIGHT, BUT SOMETIMES ALSO THE LEFT, SPONTANEOUSLY TURN OFF. THIS HAPPENS ABOUT EVERY 15 MINUTES WHILE DRIVING AT NIGHT. WE HAVE TO TURN OFF THE LIGHTS AND TURN THEM BACK ON TO GET THEM TO LIGHT AGAIN. THIS SOMETIMES DOES NOT WORK, AND WE ARE STUCK FOR A SOME TIME ON THE FREEWAY WITHOUT HEADLIGHTS. PEOPLE ON FORUMS SAY IT WILL LIKELY COST $1000 - $1800 TO REPAIR, WHICH WE CANNOT AFFORD. *TR

2004 TOYOTA PRIUS. BOTH HID HEADLIGHTS WILL OCCASIONALLY TURN OFF LIKE THE BULB BURNS OUT, BUT IF YOU TURN OFF THE HEADLIGHTS AND TURN THEM BACK ON IT TURNS ON AGAIN. MOSTLY RIGHT HEADLIGHT, BUT OCCASSIONALLY THE LEFT WILL DO THIS. NOT A LOOSE CONNECTION. ACTS LIKE A RELAY IS TRIPPING ON OVERTEMPERATURE OR OVERCURRENT AND RESETTING ITSELF AFTER THE HEADLIGHTS ARE TURNED OFF. THIS HAS BEEN OCCURRING IN MY CAR SINCE I PURCHASED IT IN MARCH 2007. TOOK IT TO REPAIRMAN, BUT IT WAS GOING TO COST OVER $2000 TO REPLACE A CIRCUIT BOARD AND HEADLIGHT ASSEMBLY. I DON'T HAVE THAT MONEY AND FROM WHAT I'VE READ ON PRIUS OWNERS WEBSITES THIS IS A COMMON ISSUE. *TR

DRIVER SIDE HEADLIGHT GOES OUT INTERMITTENTLY. SOMETIMES TURNING THE CAR OFF AND BACK ON SOLVES IT. NOW, THE PASSENGER SIDE HEADLIGHT IS OUT. LAST NIGHT, THE PASSENGER SIDE WAS OUT, SO I SWITCHED TO HIGH BEAMS. THAT TURNED OFF BOTH HEADLIGHTS! I WAS ON A LONG, DARK WINDING ROAD, UNDER TREES, SO HAD NO AMBIENT LIGHT. THE HEADLIGHT CONNECTION HAS BEEN FIXED TWICE BY THE DEALER. *TR

PASSENGER SIDE HEADLIGHT FLICKERS VERY DIMLY. I JUST NOTICED IT TODAY, ON MY MOTHER'S PRIUS. DID SOME RESEARCH, AND WAS AMAZED AT THE COST TO HAVE THE DEALER FIX THIS. IF IT WAS JUST THE COST OF THE BULB ITSELF, I COULD SWALLOW THE RATHER LARGE $130 PRICE (AT KRAGEN) AND DO IT MYSELF, BUT THE NOTES HERE, AND ON MANY OTHER SITES INDICATE THAT BULB REPLACE SOMETIMES FIXES THE PROBLEM (FOR A SHORT PERIOD OF TIME), AND AT OTHER TIMES, IT DOES NOTHING. I WOULD HATE TO THROW $130 DOWN THE TOILET. THE PRIMARY ISSUE THOUGH, IS THAT THE HEADLIGHT GOES DIM/OUT INTERMITTENTLY, WITHOUT WARNING OR PATTERN, AND THERE IS NO WAY TO RELIABLY GET IT RE-LIT. I DON'T FEEL SAVE ASKING MY 69 YEAR OLD MOTHER TO TURN THE HEADLIGHTS ON AND OFF IF IT'S DARK OUT SIDE (AND IF IT'S NOT DARK, HOW WOULD YOU KNOW IT WAS WORKING OR NOT). I AGREE, IT DOES SOUND LIKE A DEFECT AS MANY MANY PEOPLE ARE HAVING THE ISSUE, BUT MORE IMPORTANTLY, A SERIOUS SAFETY ISSUE. HOW LONG MUST WE WANT BEFORE SOME ACTION IS TAKEN BY THE NHTSA? *TR

HEADLAMP GOES OUT INTERMITTENTLY. *TR

LEFT HEADLIGHT OF MY TOYOTA PRIUS 2004 WILL TURN OFF WITH NO APPARENT CAUSE, YOU CAN TURN OFF THE LIGHTS AND IMMEDIATELY TURN ON AND IT WILL COME BACK ON AGAIN, THIS ACTION IS DANGEROUS SPECIALLY DRIVING AT NIGHT SINCE YOU?LL HAVE TO BRIEFLY DRIVE WITHOUT THE LIGHTS ON. THIS ISSUE HAS A NON-HARMONIC FREQUENCY BUT IT JUST KEEPS REPEATING, SOMETIMES ON A TRIP FOR 10 MILES IT CAN GO OFF UP TO 5 TIMES AND SOME OTHER TIMES ON THE SAME TRIP IT WILL NOT GO OFF. BY NOW THE FAILURE HASN'T?T BEEN CORRECTED SINCE DEALER WILL CHARGE OVER $1500 TO FIX IT, WHICH I DON'T AGREE TO PAY SINCE THIS IS THEIR FAILURE. *TR

LEFT HEADLIGHT WILL TURN OFF WITH NO APPARENT CAUSE. YOU CAN TURN OFF THE LIGHTS AND IMMEDIATELY TURN ON AND IT WILL COME BACK ON AGAIN. THERE DOESN'T APPEAR TO BE ANYTHING THAT TRIGGERS. DANGEROUS WHEN DRIVING AT NIGHT SINCE YOU HAVE TO BRIEFLY DRIVE WITHOUT THE LIGHTS ON .. TO TURN OFF AND BACK ON AGAIN. WHEN SPOKE TO DEALER ABOUT REPLACING WAS QUOTED $600... "BECAUSE WE HAVE TO REMOVE THE FRONT BUMPER TO GET TO THE HEADLIGHT" (TOYOTA DESIGN FLAW?) BUT THE BULB ITSELF COSTS $400!! THIS FIRST STARTED OCCURRING IN JANUARY 2008 AND WE "LIVED WITH IT" FOR A YEAR BEFORE SPENDING THE $558.15 THAT IT COST TO REPLACE THE ONE BULB IN FEBRUARY 2009. WE WERE PROMPTED TO DO SO ESPECIALLY SINCE OUR DAUGHTER WAS LEARNING TO DRIVE AND WE COULD NOT ALLOW HER TO HAVE TO DEAL WITH THIS SAFETY ISSUE. THE LIGHT IS WORKING PROPERLY NOW, BUT I AM NOT CONVINCED THAT IT WON'T HAPPEN AGAIN ...IF THE BULB WAS THE PROBLEM YOU WOULDN'T THINK TURNING IT OFF AND THEN IMMEDIATELY BACK ON WOULD FIX IT TEMPORARILY. WHEN I SPOKE TO TOYOTA TO COMPLAIN ABOUT THE COST AND APPARENT DEFECT THEY GAVE ME NO INDICATION THAT THIS WAS A REPORTED PROBLEM. SHE MADE IT SEEM LIKE I WAS THE ONLY CASE.. DECEITFUL I THINK. AFTER SEARCHING ONLINE I DISCOVERED ON MY OWN THAT THIS WAS A KNOWN PROBLEM THAT MANY OTHERS HAD. *TR

THE HEADLIGHTS ON MY 2004 PRIUS KEEP GOING ON AND OFF. TOYOTA WILL NOT COVER THESE UNDER WARRANTY AND CHANGE $875 TO REPLACE 1 BULB. *TR

RIGHT FRONT HEADLAMP OPERATING INTERMITTENTLY. DEALER REPAIR QUOTE WAS OVER $500. ONLINE ADVICE SUGGESTED THAT TOYOTA SHOULD/WOULD REPAIR AT NO COST. INITIALLY DEALER SERVICE MANAGER WANTED OWNER TO PAY LABOR, OVER $300, AND DEALER WOULD SUPPLY PART. OWNER STATED THAT SINCE THIS WAS A SAFETY AND DEFECT MATTER, TOYOTA SHOULD PAY FULL COST. AFTER 24 HOURS, DEALER AGREED TO REPLACE HEADLAMP AT NO COST. BOTH HEADLAMPS WERE REPLACED AT NO COST TO OWNER. OWNER IS 30 YEAR CUSTOMER OF THIS DEALERSHIP. SERVICE MANAGER STATED THAT TOYOTA WILL PROBABLY POST A RECALL NOTICE ON THIS MATTER. *TR

2004 TOYOTA PRIUS HAS HAD HEADLIGHT REPLACEMENTS FIVE (5) TIMES ON THE PASSENGER SIDE AND NOW HAS THE SAME PROBLEM ON THE DRIVER SIDE. 2006 TOYOTA PRIUS HAS HAD BOTH SIDES REPLACED. BOTH CARS SUFFER FROM INTERMITTENT OPERATION WHICH CAN BE TEMPORARILY RECOVERED BY TURNING THE HEADLIGHT SWITCH OFF THEN BACK ON. ALL TOYOTA WANTS TO DO IS REPLACE BULBS WHEN THE BULB OBVIOUSLY IS NOT THE PROBLEM. I AM SURE THEY ARE BEING DISINGENUOUS WITH CUSTOMERS IN AN ATTEMPT TO POSTPONE THE INEVITABLE. IT IS WAY PAST TIME FOR A RECALL - PLEASE! *TR

I AM HAVING THE SAME PROBLEM DESCRIBED HERE: THE MULTI-FUNCTION DISPLAY (MFD) FAILED. (CROSS REFERENCE NHTSA COMPLAINT #10173892). THIS IS A KNOWN DESIGN DEFECT (CROSS REFERENCE ANALYSIS ON WEB: HTTP://TECHNO-FANDOM.ORG/~HOBBIT/CARS/MFD/COMPARE.HTML AND HTTP://TECHNO-FANDOM.ORG/~HOBBIT/CARS/MFD/). TOYOTA ISSUED A TECHNICAL SERVICE BULLETIN (EITHER EL-002-04 OR EL-002-05 - CONFLICTING INFO ON THIS) ON JAN 10, 2005. WHEN THE MFD FAILS, ONE CANNOT CONTROL THE AMOUNT OF AIRFLOW TO THE WINDSHIELD (DEFROSTER). THIS PRESENTED ME WITH VISIBILITY PROBLEMS DURING THE MORNING COMMUTE. AS SUCH, I CONSIDER IT A SAFETY ISSUE. TOYOTA HAS BEEN AWARE OF THIS FOR 3 YEARS, GIVEN THE DATE OF THEIR TSB. THE ROOT CAUSE APPEARS TO BE AN UNDERSIZED SOLDER PAD ON ONE OF THE ELECTRONIC CARDS OF THE MFD. THIS RESULTS IN A CRACKING OF THE SOLDER JOINT. BECAUSE MY PROBLEM WAS INTERMITTENT, COMING AND GOING ON A FREQUENT BASIS, I PRESUME IT WAS A MICRO CRACK. THIS DOES NOT HELP WHEN THE WINDSHIELD IS FOGGING OVER. ALL OF THE VARIOUS ERROR MESSAGES THAT WERE DISPLAYED ON THE MFD WERE CONSISTENT WITH THE INFORMATION ON THE ABOVE REFERENCED WEB URL'S. THE PROBLEM IS WITH THE RELEASE F OF THE ELECTRONIC CARD ASSEMBLY AND WAS CORRECTED WITH RELEASE G. THERE ARE PICTORIAL COMPARISONS BETWEEN THE TWO RELEASES ON ONE OF THE WEB URL'S. GIVEN THAT THIS HAS AN IMPACT ON VISIBILITY DURING THE WINTER MONTHS, I AM SHOCKED THAT TOYOTA CHOSE TO SIT ON THIS PROBLEM. THE SUPPLIER OF THIS PART TO TOYOTA IS FUJITSU. *TR

I WAS APPALLED TO FIND THAT IT COST OVER $500.00 TO REPLACE THE PASSENGER SIDE HEADLIGHT AND WAS TOLD TO EXPECT THAT THE DRIVER'S SIDE LIGHT WOULD LIKELY NEED TO BE REPLACE IN THE NEAR FUTURE. *TR

EITHER OF THE HEADLIGHTS WILL RANDOMLY TURN OFF WHILE DRIVING. WHEN I QUICKLY TURN OFF THE HEADLIGHTS AND TURN THEM BACK ON, THEY WORK AGAIN FOR A WHILE. THE PROBLEM SEEMS RANDOM AND INTERMITTENT. IT HAPPENS TO BOTH THE DRIVER'S SIDE AND THE PASSENGER'S SIDE HEADLIGHT. *TR

THIS HAPPENED TO ME AND COST OVER $700 TO FIX: FAILURE OF INVERTER/CONVERTER COOLANT PUMP. HYBRID VEHICLE HAS 2ND COOLANT LOOP FOR HIGH VOLTAGE INVERTER/CONVERTER. FAILURE OF INVERTER/CONVERTER COOLANT PUMP ALLOWS INVERTER COOLANT TEMPERATURE TO RISE WELL ABOVE NOMINAL. AT A CERTAIN TRIGGER POINT HYBRID CONTROL ECU SETS A TROUBLE CODE THAT IMMEDIATELY DISENGAGES OPERATION OF INVERTER/CONVERTER (AND SIMULTANEOUSLY DISENGAGES CRUISE CONTROL AND A/C, WHICH RUNS OF ALTERNATING CURRENT PRODUCED BY INVERTER). IMMEDIATE IMPACT IS A SUDDEN LOSS OF VEHICLE DRIVE POWER AS INVERTER/CONVERTER SUPPLIES TO ELECTRICITY TO MOTOR GENERATOR 2 (MG2) WHICH IS DIRECTLY CONNECTED TO DRIVE WHEELS AND SUPPLIES NEEDED MOTIVE FORCE TO MAINTAIN HIGHWAY SPEEDS (ICE ALONE IS INSUFFICIENT). ALSO INVERTER/CONVERTER COOLANT LOOP PROVIDES COOLING FOR MG2 & MG1. CONTINUED OPERATION OF VEHICLE WITH FAILED INVERTER/CONVERTER COOLANT PUMP COULD RESULT IN CATASTROPHIC FAILURE OF MAIN ELECTRIC DRIVE MG2 AND SUBSEQUENT LOSS OF MOTIVE POWER. PUMP FAILURE OCCURS WITHOUT WARNING, ALTHOUGH THERE MAY BE A BRIEF PERIOD OF INTERMITTENT PUMP OPERATION/NON-OPERATION PRIOR TO FINAL FAILURE. THE FAILURE SEEMS TO BE THE RESULT OF EITHER A DEFECTIVE INVERTER/CONVERTER PUMP ASS'Y OR ONE INSUFFICIENTLY ENGINEERED TO WITHSTAND CONTINUOUS OPERATION IN SUCH A CRITICAL COMPONENT. PUMP FAILURE OCCURRED AFTER APPROXIMATELY 160,000 MILES, ALTHOUGH HAS BEEN KNOWN TO OCCUR IN OTHER INSTANCES AS EARLY AS 32,000 MILES. SUDDEN LOSS OF POWER

FAILURE OF INVERTER/CONVERTER COOLANT PUMP. HYBRID VEHICLE HAS 2ND COOLANT LOOP FOR HIGH VOLTAGE INVERTER/CONVERTER. FAILURE OF INVERTER/CONVERTER COOLANT PUMP ALLOWS INVERTER COOLANT TEMPERATURE TO RISE WELL ABOVE NOMINAL. AT A CERTAIN TRIGGER POINT HYBRID CONTROL ECU SETS A TROUBLE CODE THAT IMMEDIATELY DISENGAGES OPERATION OF INVERTER/CONVERTER (AND SIMULTANEOUSLY DISENGAGES CRUISE CONTROL AND A/C, WHICH RUNS OF ALTERNATING CURRENT PRODUCED BY INVERTER). IMMEDIATE IMPACT IS A SUDDEN LOSS OF VEHICLE DRIVE POWER AS INVERTER/CONVERTER SUPPLIES TO ELECTRICITY TO MOTOR GENERATOR 2 (MG2) WHICH IS DIRECTLY CONNECTED TO DRIVE WHEELS AND SUPPLIES NEEDED MOTIVE FORCE TO MAINTAIN HIGHWAY SPEEDS (ICE ALONE IS INSUFFICIENT). ALSO INVERTER/CONVERTER COOLANT LOOP PROVIDES COOLING FOR MG2 & MG1. CONTINUED OPERATION OF VEHICLE WITH FAILED INVERTER/CONVERTER COOLANT PUMP COULD RESULT IN CATASTROPHIC FAILURE OF MAIN ELECTRIC DRIVE MG2 AND SUBSEQUENT LOSS OF MOTIVE POWER. PUMP FAILURE OCCURS WITHOUT WARNING, ALTHOUGH THERE MAY BE A BRIEF PERIOD OF INTERMITTENT PUMP OPERATION/NON-OPERATION PRIOR TO FINAL FAILURE. THE FAILURE SEEMS TO BE THE RESULT OF EITHER A DEFECTIVE INVERTER/CONVERTER PUMP ASS'Y OR ONE INSUFFICIENTLY ENGINEERED TO WITHSTAND CONTINUOUS OPERATION IN SUCH A CRITICAL COMPONENT. PUMP FAILURE OCCURRED AFTER APPROXIMATELY 160,000 MILES, ALTHOUGH HAS BEEN KNOWN TO OCCUR IN OTHER INSTANCES AS EARLY AS 32,000 MILES. SUDDEN LOSS OF POWER AND DISENGAGEMENT OF CRUISE CONTROL AT INTERSTA

HEAD LIGHTS ON A 2004 PRIUS GOING OUT AND BEING ABLE TO TURN THE LIGHTS BACK ON BY JUST TURNING THE SYSTEM OFF AND THEN TURN IT BACK ON AGAIN. JUST LIKE A COMPUTER, IF SOMETHING IS WRONG, SHUT DOWN AND START OVER. THIS HAPPENS ALMOST EVERY TIME I DRIVE THE CAR NOW, THE CONSEQUENCES ARE NOT BEING ABLE TO SEE AT NIGHT AND DURING THE DAY SAFETY IS DIMINISHED WITHOUT THE HEADLIGHTS. THE HEADLAMPS WERE REPLACED BUT DID NOT REPAIR THE PROBLEM. THE OLD PARTS ARE NOT AVAILABLE. *TR

DRIVER'S FRONT SEAT FRAME FAILED UPON REAR IMPACT. CAR WAS STOPPED, IMPACT WAS AT APPROXIMATELY 25MPH. THE SEAT BACK PORTION WAS TWISTED TOWARDS THE DRIVER'S DOOR WHILE THE SEAT BOTTOM PORTION REMAINED FACING FORWARD. NO AIRBAGS DEPLOYED. CAR WAS TOTALED. *TR

ON MY 2004 TOYOTA PRIUS, THE LIGHTS GO OUT RANDOMLY. OF COURSE, AT NIGHT. I TOOK IT TO TWO TOYOTA DEALERSHIPS, AND THE FIRST COULDN'T REPLICATE THE PROBLEM. THE SECOND DEALERSHIP SAID THE FIX FOR ONE LIGHT WOULD BE AN ASTONISHING $850 BECAUSE IT'S A DEFECTIVE ELECTRONIC CONTROLLER. SINCE MY LIGHTS WORKED INTERMITTENTLY OR AFTER BEING TURNED ON AND OFF...AND AFTER SEARCHING THE INTERNET AND DISCOVERING THIS DEFECT IS COMMON. I'M THINKING LIGHTS CUTTING OUT WHILE DRIVING, IS QUITE DANGEROUS, AND IT'S A POTENTIAL HAZARD FOR BOTH DRIVERS AND PEDESTRIANS. MANY PRIUS OWNERS BELIEVE THIS IS A PRODUCT DEFECT IN NEED OF A RECALL FROM TOYOTA BEFORE SOMEONE GETS HURT. *TR

HID RIGHT HEADLIGHT GOES OUT RANDOMLY. IF I TURN HEADLIGHTS OFF AND ON AGAIN, IT RELIGHTS, BUT THEN GOES OUT AGAIN BETWEEN 15 MINUTES AND 3 HOURS. HAS BEEN HAPPENING FOR OVER A YEAR ON MY 2004 TOYOTA PRIUS.*TR

2004 TOYOTA PRUIS HID HEADLIGHT INTERMITTENTLY GOES OUT WHILE DRIVING. TURNING LIGHTS OFF AND THEN BACK ON BRINGS THE LIGHT BACK ON FOR A WHILE. THERE HAVE BEEN THREE INSTANCES DURING THE PAST 3 MONTHS WHERE BOTH HEADLIGHTS HAVE GONE OUT, RESULTING IN TOTAL LOSS OF LIGHT DURING THE NIGHT. EXCEEDINGLY DANGEROUS! THIS HAS BEEN AN ONGOING PROBLEM FOR THE PAST 6 MONTHS BUT I ONLY RECENTLY FOUND OUT ABOUT BEING ABLE TO REPORT IT TO THIS SITE. *TR

I OWN 2004 TOYOTA PRIUS I HAD PROBLEM WITH HEADLIGHTS IN 2006 I REPLACED $400 AND THE DIED AGAIN RECENTLY I HAD VERY DANGEROUS SITUATION DRIVING ON FAST ROAD THEY GONE I TURNED THEM OFF AND THEY CAME ON AGAIN FOR 10 MIN AND GONE AGAIN. *TR

BOTH HEAD LAMPS GO FOR NO APPARENT REASON. BY TURNING OFF LIGHTS AND RELIGHTING THEY COME BACK ON, BUT THEN AFTER A SHORT PERIOD OF TIME THEY GO OUT AGAIN. THE BULBS ARE NOT BURNED OUT THE HID ELECTRICAL SYSTEM IS DEFECTIVE. *TR

I OWN A TOYOTA PRIUS 2004 AND THE HEADLIGHTS GO ON/OFF WHENEVER THEY FEEL LIKE IT. WHEN THEY GO OFF IF YOU TURN THE SWITCH THEY GO BACK ON. ARE THERE ANY OTHER COMPLAINTS ON THIS ISSUE? *TR

HEADLIGHTS WILL GO OUT INTERMITTENTLY. EITHER SIDE WILL FAIL. IF YOU TURN THE LIGHT SWITCH TO "OFF" AND THEN BACK "ON" THE LIGHTS WILL COME BACK ON. NO PARTICULAR AMOUNT OF ON TIME OR BUMPS IN ROAD CAUSE THE FAILURE. BULBS ARE HID TYPE. DEALER WANTS OVER $630 TO REPLACE BULBS. NON DEALER MECHANIC ADVISED THAT IT MAY BE SOMETHING OTHER THAN THE BULB, POSSIBLY THE HID CONTROLLER. DEALER IS THE ONLY SOURCE AND VERY EXPENSIVE. THIS IS A MAJOR SAFETY ISSUE, THESE ARE THE HEADLIGHTS. THIS FAILURE NOW HAPPENS EVERY TIME THE CAR IS DRIVEN WITH THE HEADLIGHTS ON, VARIES FROM 5 MINUTES TO AN HOUR AFTER THE CAR IS STARTED. THIS HAS BEEN GOING ON FOR ABOUT 3 MONTHS. I HAVE SEEN ON LINE THAT OTHER PRIUS OWNERS ARE EXPERIENCING THE EXACT SAME PROBLEM. NO SOLUTIONS HAVE BEEN PRESENTED. *TR

TL*THE CONTACT OWNS A 2004 TOYOTA PRIUS. WHILE DRIVING BETWEEN 65-70 MPH, THE VEHICLE SUDDENLY STALLED AND SHUT OFF COMPLETELY. THE ELECTRONICS OF THE VEHICLE WERE STILL OPERATING, BUT THE VEHICLE ITSELF COULD NOT BE RESTARTED. THE VEHICLE THEN SHIFTED ITSELF INTO PARK. THE HAZARD LIGHTS IN THE VEHICLE BEGAN RUNNING OFF THE AUXILIARY BATTERY, WHICH IS A LOW POWER BATTERY. IN ADDITION, THE HAZARD LIGHTS TURNED OFF. THE CONTACT CALLED TOYOTA, BUT THEY WERE UNABLE TO ASSIST. THE VEHICLE WAS TOWED TO A DEALER. THE BATTERY WAS JUMPED AND THE VEHICLE WAS RESTARTED. A DIAGNOSTIC WAS PERFORMED AND THE VEHICLE RAN NORMALLY FOR SIX WEEKS BEFORE THE FAILURE RECURRED. THE VEHICLE WAS TOWED TO A LOCAL DEALER AGAIN AND THEY STATED THAT THERE WAS SMOKE COMING FROM THE FUSE BOX, WHICH MEANT A FUSE WAS BLOWN. AFTER REPLACING THE FUSE BOX, THE VEHICLE PERFORMED NORMALLY. THE TECHNICIANS WERE UNABLE TO FIND ANY OTHER FAILURES WITH THE VEHICLE; HOWEVER, THE CONTACT DOES NOT WANT TO DRIVE IT DUE TO FEAR OF THE FAILURE RECURRING. THE VEHICLE HAS BEEN REPAIRED, BUT IS STILL AT THE DEALER. THE FAILURE MILEAGE WAS 46,000 AND CURRENT MILEAGE WAS 47,500.

I HAVE A 2004 TOYOTA PRIUS THAT HAS THE DRIVER'S SIDE HEADLIGHT GOING OFF AND ON WHILE DRIVING. I UNDERSTAND IT IS A HID LIGHT AND I ALSO UNDERSTAND THAT MANY MANY PRIUS OWNERS OF DIFFERENT YEARS ARE HAVING PROBLEMS WITH THESE BULBS. THE BULBS AND INSTALLATION SEEM TO RUN FROM $300 UP. THIS IS SOMETHING TOYOTA SHOULD BE FIXING, RECALLING IF NECESSARY. NOT ONLY IS THIS A DANGER TO THE PRIUS OWNERS BUT TO OTHERS ON THE ROAD AND MANY TIMES THE OWNER DOES NOT KNOW THAT IS IT OUT. AND REPLACING IS AT A VERY HIGH EXPENSE TO THE OWNERS AND THE PROBLEMS SEEM TO REOCCUR WITH THE SAME OWNERS. I NEED TO REPLACE MINE BUT WANT TO KNOW WHAT IS BEING DONE ABOUT THIS BEFORE I SPEND THE HUNDREDS OF DOLLARS TO REPLACE IT. *TR

CONTACTED TOYOTA IN FEBRUARY 2009 WITH THE FOLLOWING COMPLAINT/DESCRIPTION: RECENTLY MY DRIVER SIDE HEADLIGHT HAD BEEN BLINKING OFF INTERMITTENTLY WHILE DRIVING. I THEN WOULD HAVE TO TURN THE LIGHTS OFF AND BACK ON TO GET THE LIGHT TO COME BACK ON. LAST NIGHT (FEB. 15TH, 2009), I WAS TAKING MY DAUGHTER BACK TO COLLEGE AND BOTH HEADLIGHTS UNEXPECTEDLY TURNED OFF WHILE DRIVING ON A VERY DARK STRETCH OF HIGHWAY. NEEDLESS TO SAY, THIS WAS VERY UNNERVING. I TRIED TO QUICKLY TURN OFF LIGHTS AND THEN BACK ON. THEY CAME BACK ON ON AFTER A FEW TRIES, BUT THEN THEY DID THE SAME THING TO ME ON MY RETURN BACK TO HOME. THIS WAS A 6 HOUR ROUND TRIP ON A SUNDAY. I DID NOT HAVE ANY RECOURSE BUT TO TRY TO MAKE IT HOME. I FEEL THIS IS AN EXTREME SAFETY ISSUE AND TOOK IT TO THE DEALERSHIP MONDAY. THE DEALERSHIP RAN SOME TESTS AND SAID IT WAS THE HID BULBS AND NOT THE COMPUTER ($375/BULB!!!!!). I THEN VISITED A PRIUS CHAT SITE THAT ANOTHER CUSTOMER TOLD ME ABOUT AS WE WERE WAITING FOR OUR VEHICLES. APPARENTLY THIS PROBLEM IS VERY WIDESPREAD. I AM NOW FORCED TO ONLY BE ABLE TO DRIVE MY PRIUS DURING THE DAY BECAUSE I NEVER EXPECTED A $900 PRICE TAG TO CHANGE OUT THE BULBS ON THE HEADLIGHTS, AND I AM UNABLE TO PAY THAT COST RIGHT NOW. ALSO, I LIVE OFF OF HWY 78 IN SAINT CLAIR COUNTY WHICH IS A VERY CURVY, HILLY RURAL ROAD WITH VERY LITTLE LIGHT. IF THE LIGHTS HAD SPONTANEOUSLY BLINKED OFF ON ME ON THIS ROAD WHEN EITHER I OR ONE OF MY TEENAGERS WERE DRIVING THE VEHICLE, IT COULD HAVE HAD A FAR DIFFE

HID HEADLIGHTS INTERMITTENTLY GO OUT. TURNING THE HEADLIGHTS ON AND OFF RECYCLES THE LIGHTS FOR A FEW MINUTES. *TR

THE HID HEADLIGHTS ON A TOYOTA PRUIS (2004). THE HEADLIGHTS FLICKER ON AND OFF PERIODICALLY, CHANGING WHAT HEADLIGHT GOES OUT AND SOMETIMES BOTH FOR NO APPARENT REASON. I CAN TURN ONE OR BOTH BACK ONE BY TURNING ON AND OFF THE HIGH BEAMS (WHICH BOTH WORK NO MATTER WHAT) OR BY TURNING ON AND OFF THE HEADLIGHTS. THIS HAS OCCURRED ON OUR MOUNTAIN ROAD, IN WHICH BOTH HEADLIGHTS WENT OFF, WITHOUT EVEN HITTING A BUMP. IT IS DANGEROUS, I HAVE BEEN PULLED OVER NUMEROUS TIMES FOR A HEADLIGHT OUT AND WHEN I TOOK IT INTO THE DEALER, THEY REPORTED IT AS A $393/EACH REPLACEMENT OF A BULB THAT I HAVE LEARNED WILL GO OUT AGAIN IN 20,000-40,000 MILES. *TR

MY HID HEADLIGHTS GO OUT AT RANDOM INTERVALS, IF I TURN THEM OFF AND BACK ON THE HEADLIGHT MAY REMAIN ON FOR DAYS, WEEKS OR MONTHS WITHOUT DOING THE ABOVE PROCEDURE AGAIN. SOMETIMES IT THE LEFT LIGHT OTHER TIMES ITS THE RIGHT LIGHT, SO FAR IT HAS NOT HAPPEN TO BOTH LIGHTS AT THE SAME TIME. *TR

2004 PRIUS HEADLIGHT ON PASSENGER SIDE STARTED FLICKERING ABOUT 400 MILES AGO AND HAS NOW STOPPED WORKING. WILL COST $500 TO REPLACE. THIS IS RIDICULOUS. I UNDERSTAND THAT THIS IS AN ONGOING ISSUE WITH THE PRIUS, REGARDLESS OF THE YEAR. I HAVE READ ON THE INTERNET IN CHATROOMS OF SEVERAL PEOPLE WITH THIS ISSUE. IS ANYTHING BEING DONE TO RESOLVE? *TR

BEGINNING AT ABOUT 60,000 MILES ONE OF THE HEADLIGHTS ON MY 2004 TOYOTA PRIUS BEGAN TO FAIL INTERMITTENTLY. SWITCHING THE LIGHTS OFF AND ON SEEMED TO TEMPORARILY FIX THE PROBLEM. NOW AT 100K MILES BOTH HEADLIGHTS ARE FAILING, LEAVING ME DRIVING IN THE DARK UNTIL I TURN THE LIGHT KNOB ON AND OFF SEVERAL TIMES. THE LIGHTS ARE NOW FAILING EVERY TIME I DRIVE AT NIGHT AND SEVERAL TIMES PER TRIP. *TR

MY 2004 TOYOTA PRIUS HAS HID HEADLAMPS. THE DRIVERS SIDE LAMP WILL EXTINGUISH, USUALLY AFTER A FEW MINUTES. IF I TURN THE LIGHTS OFF AND THEN BACK ON THE HEADLIGHTS COME BACK ON ONLY TO GO OUT AGAIN AFTER A FEW MORE MINUTES. THE RIGHT SIDE HEADLIGHT WORKS OK. *TR

HID HEADLIGHTS TURNOFF ON THE 2004 PRIUS. FIRST EPISODE STARTED LAST SUMMER. COST $600 DOLLARS TO REPLACE ONE OF THE HEADLIGHTS. IT HAS BEEN APPROXIMATELY 7 MONTHS AND THE OTHER HEAD LIGHT IS STARTING TO TURN OFF. THIS ISSUE IS DANGEROUS AND NEEDS TO BE FIXED BEFORE SOMEONE GETS HURT. *TR