Problems with 2007 Toyota Sienna ENGINE AND ENGINE COOLING

Failure of a defective rubber oil cooler hose occurred at app. 5:30 pm on 2/11/2013 while the sienna was being driven on a city street. the vehicle rapidly lost most of its oil, and incurred significant and very costly engine damage (resulting in the need for replacement of the engine short-block, plus other collateral engine repairs that the toyota dealership and toyota engineering eventually determined necessary). see toyota technical service bulletin t-sb-0201, dated 12/21/2011. the oil "seepage" term used by toyota in this tsb is a complete misnomer, as the oil loss was rapid and resulted in oil spraying profusely under the front of the vehicle. toyota had not previously communicated any information to its unsuspecting customer regarding this specific defective part. on 3/3/2011, the customer discovered through his own personal research the scope and magnitude of toyota's pervasive failure history with a very similar defective rubber oil supply hose. the defective rubber oil supply hose is the subject of a current multi-part limited service campaign (lsc) prior launched by toyota, however toyota is incredibly claiming to the customer that this lsc campaign (which is set to expire on 3/31/2013) does not cover the ...

I have had this van since new. air conditioning stopped working after 4 years with less than 60000 miles. first transmission problem started at 68000 miles. the transmission problem first reared its ugly head when i was backing out of a parking spot one early morning in november 2011. it sounded as though i had run over something. after getting out of the van and looking around it appeared as though everything looked good. i got back in the van and started to drive and could hear a rubbing sound coming from the front of the van and noticed it would slow down quicker when taking my foot off of the accelerator, so much so that your body would lean forward. also, i noticed the van would now slow down instead of picking up speed when coasting down a hill which is something it had never done before. i brought the van into my local toyota dealership that week to have it looked at but they said that was the way it was supposed to run. i told them 68 000 miles of driving experience since it was new has told ...

2007 toyota sienna engine stopped, and failed to start within about 15 minutes afterwards at hot weather above 95f with air conditioning on. *kb

Tl* the contact owns a 2007 toyota sienna. the contact stated that a warning light on the instrument panel was illuminated but the contact could not recall what exact light was illuminated. the vehicle was taken to the dealer for diagnostic testing where the technicians advised that the computer would have to be replaced because the wires were damaged. the contact stated that the damage was due to mice entering the vehicle and chewing the wires. the vehicle was repaired. the approximate failure mileage was 16,000. updated 03/05/12*lj

Engine/powertrain hesitates for 1-3 seconds when accelerating slowly, or accelerating quickly after slowing down such as when slowing down in an intersection, making a turn, or in slow traffic. engine has piston slap for 3-5 minutes after a cold start in weather below 40 f. the slap becomes louder with colder temps. shifting into gear with a cold engine can cause the vehicle to lurch due to high idle. driver must have foot firmly on brake before shifting into gear. problem diminishes if engine is allowed to warm for 45-60 seconds. when parking, the driver must keep the brake fully depressed, shift into park, pause 1-2 seconds before releasing brake. it seems there is a brief delay between gear lever being placed into park, and powertrain actually going into neural/park position. releasing the brake too soon will allow vehicle to roll ahead 3-6 inches. *tr

On march 12. 2010 i was traveling to arches national park with four other passengers. on the way, we decided to stop by bryce canyon utah. i was driving a 2007 toyota sienna through 26 s. main street bryce canyon city. because of bad weather condition. i had put the car in gear 3 and was driving 5 miles per hour. suddenly i heard the engine accelerate and felt the car push forward. i let off the accelerator and cautiously pressed the brakes as hard as i could, but brakes did not respond and the car continued forward about 150 feet. somehow i managed to turn right on center street and bumped onto the curb to be able to stop the car. after the car came to full stop, the engine sounded normal. because of this incident, we changed our schedule and returned home. *cn

Tl* the contact owns a 2007 toyota sienna. the contact stated that exhaust fumes were emitted into the vehicle. the vehicle was taken to the dealer who was unable to diagnose the failure. the manufacturer was not made aware of the problem. the vehicle was not repaired. the failure and current mileage was 40,000. the vin was not available.

I bought a second hand 2007 toyota sienna le in june 2009. the vehicle had about 49,000 km. i noticed that vehicle had produced unusual noise when started at cold. it sounded like diesel engine. i took a vehicle in to a toyota dealer and they attempted to correct the problem. apparently, there is a tsb issued on this problem. although i appreciate the dealer's honest effort in correcting the problem, the noise is still there when engine is started at cold. *tr

Purchase a 2007 toyota sienna minivan in december 2007 with almost 20,000 mile in it. after purchase notice that when engine is cold it sounds like a diesel engine until it warms up. also notice what feels like a slip in the transmission in lower gear. this happens if following behind someone and they turn u need to slow down. when u accelerate to get back up to speed there is a delay or a slip before transmission engages, complained with the local dealer (andy mohr toyota) where purchase from. we have complained since day one of ownership. toyota dealership states that the vehicle has a memory transmission and learns your driving habits. well me and my wife don't drive the same and neither does anyone else. no people drive the same and why would someone make a vehicle like this. they also stated that there is no fix at this time. just trying to blow me off. as for the engine slap when cold they told me it was the exhaust heating up. now i am no mechanic but let me tell you that ...

I have a 2007 toyota sienna. when the engine is cold and started i get a noise that sounds like a lifter problem. although the weather will effect the intensity and duration of this noise it is always there. the toyota dealership i took it to had a factory engineer come out and he heard the noise and said it was normal and attributed it to "piston-slap". at this time they are telling me there is no repair for this condition. they acknowledge there is a noise but they say they can do nothing about it. this noise developed approximately around 20,000 miles on the vehicle. other sienna's that acquaintances own do not have this problem. some mornings when it is cold out the noise is so loud it turns heads as i drive down the street. evidently this is a problem that toyota knows about but refuses to fix. *tr

Catalytic converter emits strong sulfur odor into passenger compartment. the smell made my family sick with headaches. toyota reps told me to note what gas station i go to and it may take multiple visits to fix since no one else reported similar problems. *tr

My brand new toyota sienna has produced hum noise at around 2500 rpm as soon as i pickup the new van. i have the dealer and the regional reps looked at and they found the noise and they also told me that all the toyota with the same engine have the same problem. i was told they will not fix it. i filed multiple complaints with toyota but received the same result! i like to know if you can do anything about it. thanks! *tr *updated 12/12/07 *bf updated 12/12/07

2007 toyota sienna made a pinging sound when first starting the vehicle. consumer states that the dealer stated that this is normal when the engine was cold. dealer called it a piston slap. finally dealer stated the vehicle had a problem. *kb