Bulletins


BulletinBulletin dateReplacement BulletinItem no.SummaryAdded
VEHICLE SPEED CONTROL - ACCELERATOR PEDAL
TSB-0087-1206/13/201210045140Toyota: accelerator pedal sensor assembly information regarding the inspection, removal, and installation, if lubrication or oil, is applied. *pe08/21/2012

Consumer Complaints


Fail datemilesoccurencesPurchase date
VEHICLE SPEED CONTROL
12/22/2012620501
 2005 sienna was driven to a parking garage and parked for two hours. upon returning to the sienna and starting the engine, three lights came on; check engine, vsc, and trac off. drove vehicle home (150 miles), the 3 lights remained on as well as loss of cruise control and an intermittent compass display. took vehicle in for inspection at a local toyota dealer and was told the skid control unit ecu needed to be replaced. i found out there are other complaints and a technical service bulletin on the 2005 sienna vehicle stability control (also called electronic stability control) system that has caused injuries. even more remarkable, my 2005 sienna has only 62k miles and in that time there has been 2 other incidences with the same symptoms. why has there not been a recall if there are already injuries in the database?? *tr
02/08/2012760501
 During the turning of the steering wheel to the left at 5-10 mph, in making a left turn, clicks and clunking noise could be heard and felt through the steering wheel. at one point, i had to apply bigger turning force to the left as if i was overcoming some unusual resistance in the steering column, making the turn uneasy and non-smooth. *tr
02/08/201276050
 During the turning of the steering wheel to the left at 5-10 mph, in making a left turn, clicks and clunking noise could be heard and felt through the steering wheel. at one point, i had to apply bigger turning force to the left as if i was overcoming some unusual resistance in the steering column, making the turn uneasy and non-smooth.
05/24/2011
 My wife had sudden acceleration issue with our 2005 toyota sienna le mini-van. when she was dropping our son outside our apartment complex at under 15 mph, car magically accelerated and ended up hitting a tree. front passenger was totally damaged and car is totaled. we had approx 65k miles on minivan.
04/01/201092000
 Our 2005 toyota sienna took off on us in rush hour traffic. moving my foot to the brake and my husband shifting into neutral was the first thing we tried, we also tried park and reverse, and turning off the cruise control, none of which worked. the toyota sienna death trap continued to accelerate rapidly even though my foot was jammed on the brake (i didn't remove my foot from the brake for another 2 1/2 hrs until the tow truck pulled in front of us. by the way, when your vehicle is suddenly traveling much, much faster than anyone else's vehicle on the road, it's all you can do to not hit someone. believe me, i was suddenly swerving in and out of the lanes and cutting everyone off. the only thing that stopped our toyota death trap was pulling the key from the ignition, certainly not ideal in rush hour traffic. while this was going on, our son was in the backseat calling 911, while our daughter cried. we don't have a lawyer and toyota won't fix our van. what are we supposed to do with it?
02/24/201164000
 2005 toyota sienna uncontrolled acceleration on the highway. my wife was passing another vehicle, and when she merged back into the right lane, the vehicle maintained speed even though she let off of the accelerator. she managed to get it under control within a few seconds. this is the 2nd time that this has happened. the vehicle has 64,000 miles.
04/01/201092000
 Our 2005 toyota sienna took off on us in rush hour traffic. moving my foot to the brake and my husband shifting into neutral was the first thing we tried, we also tried park and reverse, and turning off the cruise control, none of which worked. the toyota sienna death trap continued to accelerate rapidly even though my foot was jammed on the brake (i didn't remove my foot from the brake for another 2 1/2 hrs until the tow truck pulled in front of us. by the way, when your vehicle is suddenly traveling much, much faster than anyone else's vehicle on the road, it's all you can do to not hit someone. believe me, i was suddenly swerving in and out of the lanes and cutting everyone off. the only thing that stopped our toyota death trap was pulling the key from the ignition, certainly not ideal in rush hour traffic. while this was going on, our son was in the backseat calling 911, while our daughter cried. we don't have a lawyer and toyota won't fix our van. what are we supposed to do with it?
02/24/201164000
 2005 toyota sienna uncontrolled acceleration on the highway. my wife was passing another vehicle, and when she merged back into the right lane, the vehicle maintained speed even though she let off of the accelerator. she managed to get it under control within a few seconds. this is the 2nd time that this has happened. the vehicle has 64,000 miles.
04/01/201092000
 Our 2005 toyota sienna took off on us in rush hour traffic. moving my foot to the brake and my husband shifting into neutral was the first thing we tried, we also tried park and reverse, and turning off the cruise control, none of which worked. the toyota sienna death trap continued to accelerate rapidly even though my foot was jammed on the brake (i didn't remove my foot from the brake for another 2 1/2 hrs until the tow truck pulled in front of us. by the way, when your vehicle is suddenly traveling much, much faster than anyone else's vehicle on the road, it's all you can do to not hit someone. believe me, i was suddenly swerving in and out of the lanes and cutting everyone off. the only thing that stopped our toyota death trap was pulling the key from the ignition, certainly not ideal in rush hour traffic. while this was going on, our son was in the backseat calling 911, while our daughter cried. we don't have a lawyer and toyota won't fix our van. what are we supposed to do with it?
02/24/201164000
 2005 toyota sienna uncontrolled acceleration on the highway. my wife was passing another vehicle, and when she merged back into the right lane, the vehicle maintained speed even though she let off of the accelerator. she managed to get it under control within a few seconds. this is the 2nd time that this has happened. the vehicle has 64,000 miles.
04/01/201092000
 Our 2005 toyota sienna took off on us in rush hour traffic. moving my foot to the brake and my husband shifting into neutral was the first thing we tried, we also tried park and reverse, and turning off the cruise control, none of which worked. the toyota sienna death trap continued to accelerate rapidly even though my foot was jammed on the brake (i didn't remove my foot from the brake for another 2 1/2 hrs until the tow truck pulled in front of us. by the way, when your vehicle is suddenly traveling much, much faster than anyone else's vehicle on the road, it's all you can do to not hit someone. believe me, i was suddenly swerving in and out of the lanes and cutting everyone off. the only thing that stopped our toyota death trap was pulling the key from the ignition, certainly not ideal in rush hour traffic. while this was going on, our son was in the backseat calling 911, while our daughter cried. we don't have a lawyer and toyota won't fix our van. what are we supposed to do with it?
02/24/201164000
 2005 toyota sienna uncontrolled acceleration on the highway. my wife was passing another vehicle, and when she merged back into the right lane, the vehicle maintained speed even though she let off of the accelerator. she managed to get it under control within a few seconds. this is the 2nd time that this has happened. the vehicle has 64,000 miles.
11/14/2010108/21/2005
 2005 toyota sienna. attorney writes on behalf of clients in regards to a collision due to unintended acceleration *tgw as the consumer was slowly attempting to park the vehicle, it suddenly and unexpectedly accelerated out of control. the vehicle hit a pole directly ahead, went airborne and landed on top of a parked vehicle and rolled to the side. the consumers left hand fingers were crushed causing injuries. *jb
11/10/201042000
 Tl-the contact owns a 2005 toyota sienna. the vehicle was parked with the engine running, the contact engaged the brakes and the vehicle began to lunge forward and accelerated into a building. the building sustained moderate damages. the police was not called to the scene. there was no personal injury; and the vehicle's front bumper paint exhibited minor chipping. the vehicle was taken to an authorized dealer where they were unable to replicate the failure. the failure mileage was approximately 42,000. js
11/03/201065000
 While very slowly pulling my 2005 toyota sienna minivan into a parking space, when the vehicle had nearly come to a complete stop, all of a sudden the vehicle accelerated to full throttle, hopping over the concrete bumper at end of parking space and crashing head on into a pole. the vehicle was towed to a dealer and is awaiting inspection by the insurance adjuster.
10/18/201053978
 I had a sudden acceleration incident in my 2005 toyota sienna. i was making a slow u-turn in front of my home into a parking space by the curb on the far side of the street. the width of the street is such that even with the steering wheel turned fully to the left, the passenger tire rises up a driveway incline just before the car is 180 degrees around. as i usually do for this turn, i need to turn slightly more than 180 degrees, have the passenger tire come out of the driveway, then turn back to be parallel to the curb. i had slightly misjudged the turn this time, and realized that my passenger tire was going to have to drop an inch or two off the rising curb at the edge of the driveway. because of this i am certain i had my foot on the brake pedal to keep my speed down. about 5 feet before the wheel was going to come off the curb, the car lurched forward, jumped the curb violently and fast, and continued my turn carrying me partly back into the street. i was very surprised, but brought the car to a stop quickly with the brake. the engine was no longer revving once i stopped. i estimate tat the acceleration lasted for not more than 2 seconds, possibly only 1 second. i reversed the car and then drove it forward into my intended parking space. after putting the shifter into p, i revved the engine and everything seemed fine. fortunately, there was no accident and no damage i am aware of (although the passenger wheel did make a thump as it came over the curb).
01/01/19013
 Letter from congressman loebsack's office on behalf of constituent re sudden acceleration of toyota sienna *tgw the consumer stated the vehicle suddenly accelerated while traveling with her husband and two children. the brakes did not stop the vehicle, nor did shifting the gear into neutral, park or reverse. the rpm needle went all the way to the right and there was a loud roar coming from the engine. the consumer pulled the key from ignition at about 75 mph in the middle of rush hour traffic. the consumer stated the sudden acceleration occurred twice before. toyota claimed the floor mats were the cause, however the consumer's husband checked the floor mats and they were not the problem. *jb updated 06/15/10.*jb
05/07/20105
 I was pulling into a parking space in a shopping center parking lot when my 2005 toyota sienna suddenly accelerated and my van lurched forward into a tree. this has never happened before to me in this, or any other vehicle. as a result of the crash, my car was not drivable and had to be towed from the scene. i filed a police report, as well as a claim with my insurance carrier. i have since filed a complaint with toyota, but have not yet heard from the inspector assigned to my case. currently, the van is at a body shop awaiting inspection by the toyota representative before anything else is done.
03/14/2010105000
 Tl*the contact owns a 2005 toyota sienna. the contact stated that while driving at approximately 45 mph with the cruise control activated, the vehicle suddenly accelerated to 55 mph. the vehicle was taken to an authorized dealership but the dealer could not duplicate the problem. the failure mileage was approximately 105,000. the current mileage was approximately 110,000.
04/11/2010100000
 2005 toyota sienna had cruise control on. the vehicle began to 'shake' and the speedometer climbed to 80 mph then down to 60 mph. it didn't seem to actually be accelerating--it felt like the vehicle was fighting to not lose power. i deactivated the cruise contol by touching the breaks. i pulled off the freeway, turned the motor off, waited and started again at a slower speed without the cruise control on. after a while the vehicle again began to 'buck and shake', the speedometer raced to 80 mph (though the car itself) did not seem to have rapid acceleration) then the speedometer dropped to 50 mph. over the phone my husband advised i turn on the cruise control and turn it off again. i did and drove about 45 minutes home at speeds from 55-65 without another incident. i will take the car to a dealership tomorrow to check out. the vehicle has approx. 100000 miles on it.
04/01/2010900001
 Tl* the contact owns a 2005 toyota sienna. the contact stated while utilizing the cruise control at 40 mph, the vehicle abnormally accelerated without driver intent. the vehicle was towed to an authorized dealer, but the failure could not be duplicated. there were no repairs made to the vehicle. the failure mileage was 90,000. updated 05/26/10 *bf the consumer stated the only way to stop the vehicle was by pulling the key out of the ignition. updated 05/28/10.*jb
03/01/20101
 We own a 2005 toyota sienna that has had an ongoing sudden acceleration problem since we bought the car new in 2005. the engine will suddenly accelerate when turning the car at lower speeds. this problem has been documented hundreds and hundreds of times, by sienna owners on siennaclub.com (no longer in use) and on siennachat.com. the members on these sites have complained to toyota for years about this problem. we have taken the car in for reprogramming but that did not fix the situation. *tr
05/25/2009420001
 While driving from ca to va in may of 2009 i experienced an unintended acceleration while in cruise control. this occurred after i would slow down for traffic and then activate the resume control. this happened on several occasions during the trip east and on the return trip back to ca. the speeds with the unintended acceleration reached 95mph on the first occasion and stopped once i applied the brakes. after the first incident i was able to keep the acceleration from reaching more than 10 to 15 mph over the assigned cruise control speed. *tr
02/12/2010500001
 The electronic throttle control system on my van is malfunctioning and it puts the vehicle in fail safe mode. the local toyota dealer as well as toyota customer service do not want to investigate this recurring problem for the dtc p0121. the dealers do not analyze the freeze frame data or investigate the problem beyond reading the code from obd ii scanner. i had asked them for the electrical values for the throttle valve motor and the accelerator pedal but they have refused that information and want me to replace the throttle body by spending $1200.00. the first time this problem started when the vehicle had 50,000 miles and i replaced the throttle body from same year and model vehicle with 20,000 miles. now after 10,000 miles same problem has started again and the dealer as well as toyota want me to replace the throttle body. i feel that the throttle body or the gas pedal in conjunction with other electrical components are causing the dtc code and merely replacing the throttle body second time will not fix the problem unless the newer throttle bodies are without the problem original throttle bodies had. in that case i should not have to pay for the replacement part. it is important that the problem is investigated and identified before any parts are replaced. i also offered toyota the original throttle body from the vehicle for testing / checking for the problem but they refused my offer. this sudden loss of drivebility due to the activation of fail safe mode is dangerous and could result in accident and / or fatality. any help in this matter will be appreciated. *tr
02/19/20101220003
 3 times in the past 5 days (once last friday 2/19 and twice today 2/23) my 2005 toyota sienna has lunged forward while driving in traffic at 35 mph. i did not feel the pedal move under my foot. the surge was momentarily, but had there been anything close, i would have hit it. i drove immed to bell toyota, phoenix, az and was turned away at the service dept (it is not on the recall list and there was nothing they could do) they suggested i call toyota. i called toyota, they suggested i go to a dealership. i emailed toyota corp. they suggested i go to a dealership. bell rd toyota offered to do a diagnostic check for a $108.00 fee. i called wright toyota,scottsdale and they agreed to do a health insp. for free. *tr
01/05/2010980001
 After i read the article about apple inc. co-founder steve woz wozniak's experience about his 2010 prius, i was relieved somewhat from my own doubt and confusion. i bought a used 2005 sienna xle limited (with radar sensor) last november with 95000 mileage. it accelerated unintentionally several times when i was using cruise control with only single push of the acceleration handle. i once let the car went up to 90 mph before i braked it off from the cruise control mode. the acceleration was very powerful when it malfunctioned. all happened in several seconds. you could hear the engine revering loudly towards full speed. i had no problem to brake it off every time though. i also believe it is an electronic or software problem since none of my feet was on any pedal when this happened and there was no floor mat issue at all. *tr
07/15/2009490002
 I purchased my toyota sienna in june 2008. this past summer(2009) and fall my wife complained that the vehicle accelerated own its own twice. both occurrences were in parking lots when she was coming to a complete stop, suddenly the car lunged forward. she was lucky both times with no accidents. i initially brushed it off thinking she accidentally hit the gas pedal and didn't realize it. with the recent recalls i am surprised that the sienna has not been recalled. now, i am concerned about the vehicle's safety (which is why i bought the toyota in the 1st place). i would please like my sienna looked at for the same acceleration recall issue. *tr
10/10/2006200001
 Toyota 2005 sienna limited xle when using cruise control (we only use this on highway while traveling so this occurs at that time. when we take the cruise off and then restart it is accelerates and fortunately we can brake to get it incontrol, for example , if we have the cruise set at 70 and disengage when we reengaged it will automatically accelerate for 90 miles or greater. we took it to our toyota dealer and he said it could be the linkage - we have been told by a mechanic that there is no such thing in the 2005 toyota this is a continuing problem. *tr
10/31/20081
 On or about october 31, 2008, a 2005 toyota sienna xle accelerated suddenly and unexpectedly. the driver steered the vehicle around cars, curbs and other obstructions while the vehicle continued to accelerate through a parking lot. attempts to brake the vehicle were futile. the vehicle eventually hit a curb which deflated a tire, then continued through a chain-link fence and a field and into a portable building, finally coming to a stop. the driver was injured in the unintended acceleration incident and died. updated 02/26/10 *bf *tr
10/09/2009500001
 While pulling into the driveway and slowing to a stop, the car suddenly lurched and then accelerated forward, pushing the car through the garage door and about 10 feet into the garage before the engine stopped revving and came to a stop. the rollup garage door was destroyed. the impact scraped the front bumper of the car and made a small dent on the roof near the top of the windshield. *tr
01/20/2010920001
 I have a 2005 toyota sienna and it also has acceleration problems like the ones listed by toyota. the car jumps speed all of a sudden. i think they should be looked at for safety reasons also considering many people take kids in these vans. *tr
12/15/200520001
 Toyota sienna 2005. intermittently the car accelerates on its own. has been happening since i bought it. never thought much about it, because it would slow down when i put on brakes. in light of the recent problems with other models, i think this is part of the problem. the car feels as if it was on cruise control, getting up to speed. however, i have never used cruise control as i don't like it. is there a link between the cruise control and these problems? *tr
06/14/200742000
 Tl*the contact owns a 2005 toyota sienna. while driving 65 mph the vehicle accelerated and moved to one side of the road; however, after the engine shut off it reset and began driving normally. the contact stated that the duplicate failure occurred in 2009 and the accelerator pedal was stuck. the contact had to reach down and pull the pedal from the stuck position. the vehicle was taken to the dealer who stated that there was nothing wrong with it. the contact stated that the failure occurred at least three to four times. the toyota manufacturer has not been notified. the failure mileage was 42,000.
05/01/20091
 2009: one incident several months to a year ago if i am not mistaken that my car accelerated. it felt like my car had increased by a significant amount in mph. i thought i pressed the gas. i attempted to accelerated a bit but the car appeared to accelerate on its own. i believe i stepped on the brake at some point but it did not change the acceleration. i can't say if i put on brakes first to slow myself down or accelerated. however, i do know neither one affected the car from the acceleration. the acceleration stopped on its own. i have not had any other incident but i am acutely cautious when driving because that incident did seem unusual and worrisome at the time. i did not report b/c i placed it as isolated. i , however, want to ensure the safety of others and my family. i am sure of this experience as an occurrence that should be reported. *tr
10/19/200952000
 Tl* the contact owns a 2005 toyota sienna . while approaching a complete stop the vehicle lurched forward. consequently he crashed into some bushes, and then into a boulder. the vehicle was taken to a toyota dealer, and a technician repaired the front bumper and all other body damages. the technician then added that his vehicle was not included in the recent toyota recall for the floor mats. a police report was available. the failure mileage was 52000 . the current mileage was 55000. updated 3/16/10 *cn
09/15/2008710001
 July 2008 i was driving my 2005 toyota sienna i was on the ramp to enter the highway doing 35mph when my car suddenly jumped to 75mph without me touching the gas pedal. i stayed calm because my kids were in the car with and i didn't want to scare them. thank god i jumped in the next lane where were not to many cars and just pressed the brake pedal hard thank god the car slowed down . i knew something was wrong with the car. i took to the mechanic he found nothing out of place . it later happened again maybe two weeks late this time i was on city streets and did the basically the same thing as before. i recently saw reports and i was not alone and was something very wrong with the toyota system. please do something before any more people get hurt. *tr
04/09/200940000102/21/2005
 Tl*the contact owns a 2005 toyota sienna. while driving between 5-6 mph, another vehicle ran a stop sign and struck the left rear driver's side of the contact's vehicle. her vehicle fish-tailed and turned to the left. the vehicle accelerated and struck another vehicle. the contact had no control over the vehicle. she attempted to place the vehicle into park, but was unsuccessful. the engine revved and the vehicle accelerated again. the vehicle struck a curb, a boulder, and then a palm tree before coming to a complete stop. the brakes failed to operate during the incident. a police report was filed and there were no injuries. the vehicle was towed to a gmc dealer and they test drove the vehicle, but were unable to duplicate the failure. the vehicle is still at the gmc dealer and will be appraised. the failure and current mileages were 40,000. updated 5/7/09 *cn updated 05/11/09.*jb
09/14/20051000508/01/2005
 Tl*the contact owns a 2005 toyota sienna. while driving at various speeds, the vehicle decelerates on its own. the vehicle jerks when the contact depresses the accelerator pedal. the dealer reprogrammed the software for the throttle, however, the failure still occurs. the current mileage was 35,300 and failure mileage was 1,000. updated 01/09/08. *lj the consumer stated has had problems with the door of the vehicle. updated 12/12/07 *tr
08/27/2005875108/01/2005
 On several instances when you let off the gas to go around a corner then when you accelerate nothing happens then the engine tries to compensate by over revving. on another occasion pulled into traffic, stepped on the gas nothing happened for several seconds, almost broadsided. *nm
08/01/20051
 I pulled into a parking lot and made a right turn to pull into a parking space. i was halfway into the space, my foot was on the brake pedal, when i felt the van jerk-it then suddenly accelerated, went over the raised curb in front,onto the exit lane of the shopping center,turned around back into the parking lot(the wheel was turned to the right still),hit the building breaking a couple of windows, and then came to a stop after hitting a barricaded dumpster along the way. all the while i was hitting the brakes, but they didn't seem to work. the airbag deployed in the process,the front of the van was badly damaged. thankfully there were no pedestrians in the lot and i didn't hit any other vehicle and my son and i walked away with minor injuries. i have contacted toyota. they inspected the van last week and i am waiting to hear their report. the van hasn't been fixed yet-i am waiting to hear from toyota as to the next course of action. about an hour before this incident occurred, i was pulling out of another parking space in reverse,when the van just stopped and didn't move. i restarted it,put it on reverse and then it moved alright,was bumpy-i thought a tire was flat-stopped and checked to see all of them-they were fine, and after that all was smooth and well until the crash. *jb
06/27/200532003004/30/2005
 Dt: the consumer was made aware of the fact that his vehicle has a laser that sends a message to the cruise control to adjust to the vehicle in front of his. when the vehicle in front of the consumer's vehicle moves away the cruise control is supposed to gradually bring the vehicle back up to the original programmed speed. the consumer 's vehicle, however would jerk quickly back up to speed everytime this happened. the movement was hard enough to jerk the passengers backwards. the vehicle was taken to the dealer who indicated that would call toyota to check if there was a recall. they called the consumer back and simply told him that the vehicle was designed to do that. *nm
07/11/20058600106/29/2005
 Consumer states: his car hesitates when he accelerates. he just bought the car 2 weeks ago and it has been doing it since he bought the car. it mainly happens when he is slowing down, when he presses the gas pedal; it takes about 1 or 2 seconds to engage. he is concerned this will happen in congested traffic. he has not yet talked to the dealer. he has not yet talked to the manufacturer but he plans on doing that today. consumer was only able to provide the city, state and phone number of the dealer. *nm
05/25/2005600204/30/2005
 I was backing out of a parking space in a parking lot. i put the car in reverse, place my foot on the brake, put the car into drive, lifted my foot off of the brake and the car immediately began to accelerate without my foot even touching the accelerator. when i put my foot on the brake, the brake pedal went all the way down to the floor without stopping the vehicle. the van struck another vehicle that was parked in the parking lot, went over the curb of the parking lot, down an embankment into a ravine and headed towards a tree. the passenger that was in the front seat then reached over and put the car into park, which brought the car to a stop. the whole time the car was moving i was trying to stop the car by pumping the brakes, but they did not work. the car was accelerating the entire time until the passenger stopped it by shifting into park. the airbags did not deploy. damage was done to the front passenger bumper and side of the car, the driver's side front tire exploded. after the accident, the brakes did function.
03/25/20056001
 While pulling into the garage vehicle suddenly and unexpectedly accelerated and lurched forward through the garage wall into the dining room of consumer's home. vehicle was towed to the dealer.*ak
VEHICLE SPEED CONTROL - ACCELERATOR PEDAL
04/01/2010900001
 Will someone please call me asap. my toyota sienna suddenly accelerated last week in des moines, ia. toyota is saying that siennas are not under recall. i was traveling with my husband and two children. the brakes could not stop the vehicle, nor did shifting it into neutral, park, or reverse. the only thing that worked was pulling the key from the ignition at about 75 miles per hour. the toyota sienna is a time bomb. the sudden acceleration of my sienna has happened at least two other times. toyota is claiming that the floor mats caused it but my husband and i checked the floor mats, they were not the problem. toyota wants us to come get the van but it's not safe. from nhtsa web site. updated 05/24/10
06/30/20054585503/29/2005
 Dt: contact owns a 2005 toyota sienna. the vehicle has severe hesitation, almost impossible to drive the vehicle on a wet road or on a snowy road. gas pedal and transmission do not seem to connect. no crashes. no police reports. no fires. the vehicle has been to toyota dealer 5 times; the mechanic came back and said they found nothing wrong with vehicle. *ak (11/08/05) the transmission would down shift very harsh on turns and on hills. the service dealer placed an upgraded computer in the vehicle but the problem worsened. *sc
05/16/2005550012/07/2004
 Owner of 2005 toyota sienna le minivan purchased in december 2004. 1. noticed that this problem started to occur over the last two months and the occurrence has increased in frequency. 2. description of problem: when depressing the accelerator pedal to accelerate from a stop, the throttle will occasionally fail to respond to the initial pressure being applied to the pedal. continuing to depress, or applying additional pressure to, the accelerator pedal will eventually cause the throttle on the engine to engage and this results in an unanticipated surge in engine output and acceleration. my concern is that this unanticipated engine surge and acceleration could lead to and/or cause a traffic accident. 3. brought this problem/issue to the attention of the service department at lombard toyota (lombard, illinois). spoke with two different service writers at lombard toyota and they both mentioned that this was a known issue by both toyota and the dealership. lombard toyota mentioned that they are currently unable to do anything to correct this problem/issue at this time.
VEHICLE SPEED CONTROL - CRUISE CONTROL
06/02/200630110/22/2004
 2005 toyota sienna xle - cruise control will not hold when going downhill. dealer checked it, contacted toyota tech. support. they were told this model is not designed for cruise control to hold going downhill! i contacted toyota via e-mail and was told the same thing. i have owned many cars and never have had cruise control not hold on a downhill road. it will be set at 60 and continue going as high as 80 when brakes applied. this is a danger, defect, something is not right with such a design. i am putting in a recent date, but it has occurred since the vehicle was purchased. number of failures is on-going. *nm