2007 Toyota Sienna engine problems

“As a result of the transmission cooler being a part of the radiator system, the transmission cooler ruptured while driving causing immediate loss of power and the engine to overheat. This malfunction also caused coolant and transmission oil to contaminate the engine compartment as well as the transmission. This is a major iengineering flaw and safety issue as I was on the interstate when it happened and was stranded on the side of the highway until help could be obtained.”

“The contact owns a 2007 Toyota Sienna. The contact stated while driving 40 MPH going up a curvy road, the ABS service warning light illuminated, and the vehicle lost motive power for several seconds before independently regaining motive power. The contact stated that the failure was intermittent. The contact took the vehicle to a local dealer to be diagnosed however, the mechanic was unable to retrieve a fault code. The manufacturer was not made aware of the failure. The failure mileage was approximately 160,000.”

“The rubber part of the VVT-I oil line appears to worn and leaking. There is a Toyota Campaign to replace this faulty designed oil line with a full metal line, but for some reason my 2007 Toyota Sienna VIN is not showing up with this campaign. The oil will leak from the engine and cause failure. Please re-check which vehicles are impacted by this Toyota design problem in this VVT-I oil line.”

“TL* THE CONTACT OWNS A 2007 TOYOTA SIENNA. THE CONTACT STATED WHILE STOPPED AT TRAFFIC LIGHT, THE VEHICLE STALLED WITH THE BRAKE PEDAL DEPRESSED. SEVERAL WARNING LIGHTS ILLUMINATED ON THE INSTRUMENT PANEL. THE CONTACT SHIFTED THE VEHICLE INTO NEUTRAL AND COASTED INTO A DRIVEWAY. UPON INSPECTION, THE CONTACT DISCOVERED THAT THERE WAS NO OIL IN THE ENGINE. THE CONTACT REFILLED THE OIL HOWEVER, THE OIL IMMEDIATELY LEAKED OUT THE VEHICLE. A MECHANIC ARRIVED ON SCENE AND REPLACED AN OIL HOSE. AFTER THE HOSE WAS REPLACED, THE CONTACT HEARD AN ABNORMAL KNOCKING NOISE IN THE ENGINE. THE CONTACT TOOK THE VEHICLE TO SEVERAL INDEPENDENT MECHANICS AND WAS INFORMED THAT THE ENGINE FAILED AND NEEDED TO BE REPLACED. THE CONTACT HAD THE VEHICLE TOWED TO SUBURBAN TOYOTA OF FARMINGTON HILLS (25000 HAGGERTY RD, FARMINGTON HILLS, MI 48335) WHO CONFIRMED THERE WAS AN ENGINE FAILURE. THE CONTACT THEN HAD THE VEHICLE TOWED TO AN INDEPENDENT MECHANIC WHERE THE ENGINE WAS REPLACED. AFTER THE ENGINE REPLACEMENT, THE CONTACT EXPERIENCED SEVERAL TRANSMISSION ISSUES. THE CONTACT STATED THAT WHILE AT A STOP, THE VEHICLE INDEPENDENTLY SHIFTED IN AND OUT OF GEAR WITHOUT WARNING. ALSO, WHILE…”

“DRIVING 55MPH ON FRWY, VAN STARTED SMOKING IN THE REAR AND OIL ON BACK OF VAN. SLOWLY DROVE SHORT DISTANCE HOME AND LIGHTS ON DASH CAME ON UPON ARRIVING HOME. OIL LEAKED ON STREET WHERE WE PARKED. HAD MOBILE MECHANIC LOOK AT IT. OIL COOLER HOSE HAD BURST. HE REPLACED IT, WE DROVE THE VAN 50 MILES ON SHORT TRIPS.WHEN ON FRWY, IT HAPPENED AGAIN ABOUT 3 WKS LATER. HAD TOWED HOME. SAME HOSE BUSTED AGAIN. LOOKED ON INTERNET SITES & FOUND SAME PROBLEM HAS OCCURRED TO MANY PEOPLE WITH SAME VAN YEAR. LONGTERM ONGOING PROBLEM. CALLED TEJAS TOYOTA IN HUMBLE, TX AND SVC MGR SAID TOYOTA OFFERED AN EXTENDED WARRANTY (KNEW THERE WAS A PROBLEM), BUT IT ENDED AT 100,000 MILES/10YRS (WE HAVE 120, 900) AND IS 2007 VAN. WE'VE ALREADY HAD IT TOWED AND FIXED TWICE. WE'RE RECOVERING FROM NEAR DEATH/COVID AFRAID TO DRIVE IT SINCE WE CAN'T TRUST IT. BASED ON INTERNET STORIES BY OTHERS WITH SAME PROBLEM, & SVC MGR AT TOYOTA OPINION, FEAR IS WARRANTED. OUR VAN WAS REPAIRED 2X W/ SAME TYPE OF INFERIOR HOSE PUT ON VAN WHEN BUILT BY A MECHANIC NOT AT TOYOTA. NONE OF US REALIZED INFERIOR PART WAS THE PROBLEM.NOW WE NEED TO REPAIR IT AGAIN WITH A "KIT" THAT TOYOTA SPECIFICALLY MADE BECAUSE…”

“WHEN ACCELERATING THE ENGINE MAKES A TRACKING NOISE LIKE BAD VAVLE SPRINGS OR CAMPS. ONLY HEAR THE NOISE WHEN ACCELERATING. STARTED HAPPENING AFTER 60K MILES. COMMON PROBLEM WITH THE ENGINE TOYOTA USES WITH THE SIENNA.”