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Toyota Sienna Uncontrolled Acceleration

65 messages,  Last post on Jul 28, 2009 at 7:43 AM

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What is this discussion about? Toyota, Van


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#26 of 65
Re: Sienna Uncontrolled Acceleration [mnrep2] by jul333
Mar 17, 2007 (7:24 pm)
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Replying to: mnrep2 (Mar 17, 2007 2:44 pm)

You would
#27 of 65
Re: Sienna Uncontrolled Acceleration [jul333] by caravan2
Mar 18, 2007 (12:32 pm)
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Replying to: jul333 (Mar 17, 2007 2:14 pm)

Then two things happened... van accelerated and brakes failed. very strange... both these things are mechanical even some electronics is involved in gas mixtures and electrical firing of ignition...
#28 of 65
Re: Sienna Uncontrolled Acceleration [jul333] by mleonardo
Apr 09, 2007 (6:04 pm)
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Replying to: jul333 (Feb 23, 2007 3:19 pm)

I hope you didn't trade in for another Toyota. All that tells them is that your a blind Toyota fan and they can pull that kind of "we cant find the problem" stuff on you any time. All that will result is you giving them more business. If this happens with my sienna, Toyota will never again be on my shopping list. I am already dissatisfied with my experiences with Toyota. I can't understand why a person would continue to patronize a car maker whos vehicle did this and was given no reason for it.
#29 of 65
Re: Sienna Uncontrolled Acceleration [caravan2] by drbob1
Jul 05, 2007 (12:57 pm)
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Replying to: caravan2 (Mar 18, 2007 12:32 pm)

I hate to pile on here, but this has been a problem since the early 80s Audi 5000. It was extensively analyzed including segments on 60 Minutes, and the testing rather conclusively proved that the problem was mis-application of the throttle instead of the brake. In fact, there's a lovely video of an Audi experiencing "unintended acceleration" showing that the brake lights did not, in fact, come on at the time the victim described pushing the brake pedal to the floor. It turns out that the problem is actually ergonomic-the brake and the accelerator are too close together. It's probably more dangerous than a purely mechanical problem because there's not really a fix for it (like there might be if it was computer or ABS related). It has been recorded by the NHTSA as a problem with small numbers of almost every vehicle ever built, but some are much more prone to it than others.
#30 of 65
Re: Sienna Uncontrolled Acceleration [drbob1] by ateixeira
Jul 06, 2007 (5:58 am)
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Replying to: drbob1 (Jul 05, 2007 12:57 pm)

Modern brakes are 10 times more powerful than any engine. Note they're strong enough to lock up the tires at virtually any speed, while wheelspin under acceleration only happens in low gears.
 
If you hit the brakes strong enough, any car will stop, doesn't matter if the throttle is stuck wide open.
#31 of 65
Has anyone experienced a Toyota Sienna moving after it is placed in park? by shaina1
Feb 17, 2008 (3:04 pm)
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I need to get in touch with anyone else who has had a similar problem with their Toyota Sienna. On 2/14/08, my 2006 Toyota Sienna was in park in my driveway with the ignition on. I had opened the garage door half-way to clean off the base of the door. While I was doing that, the van moved forward, pinning me between the van hood and the bottom edge of my half-open garage door. I was being compressed right across my hips and naval, so I was able to scream for help. Luckily, my neighbor was home and, after about five minutes, heard my screams for help. My neighbor had her husband call 911 and ran over to me and asked me what she should do. (She was afraid to back up the van, releasing the pressure on my abdominal area in case that action caused me further injury.) I screamed for her to back up the van. She is sure the van gear shift was still in park even though the van was still attempting to travel forward but could not because my body was in the way. My neighbor then put the gear shift into reverse (which worked, thank God) and backed the van away from the garage door, releasing me. 911 came and said I miraculously had no internal injuries, although my garage door and van hood are damaged. I went to the hospital and got a catscan, which also confirmed no internal injuries. I have put a claim in with Toyota Corporate and NHTSA. My husband also took the van to the Toyota Dealership where we purchased the vehicle. They said they could find nothing wrong with it and basically looked at my husband cross-eyed when he insisted that there had to be a problem. I am now afraid to drive this vehicle. From browsing this website, I see that there are other people who have had similar problems with their Toyota Siennas. Please respond to this message ASAP. Thank you.
#32 of 65
Re: Has anyone experienced a Toyota Sienna moving after it is placed in park? [shaina1] by ateixeira
Feb 19, 2008 (8:33 am)
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Replying to: shaina1 (Feb 17, 2008 3:04 pm)

Wow! Glad you are OK.
 
That was some Valentine's Day!
 
I'm not sure there is much to say. Did the police come as well, to file an accident report? That might help solve the mystery.
 
You sure it wasn't in Drive? On a slight incline, the van will not move forward even in D. Did the neighbor notice what gear it was in before changing it to Reverse?
#33 of 65
Re: Has anyone experienced a Toyota Sienna moving after it is placed in park? [ateixeira] by shaina1
Feb 19, 2008 (12:09 pm)
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Replying to: ateixeira (Feb 19, 2008 8:33 am)

Yes, I am sure my 2006 Toyota Sienna was not in Drive. It is impossible to leave the van in Drive in our driveway and exit the vehicle because the vehicle is moving too fast; even if I were to stop it entirely at the very base of the incline of the driveway, as soon as I take my foot off the brake to exit the vehicle, it moves too fast to exit it. Also, my neighbor who rescued me and backed up my 2006 Toyota Sienna says she is sure she had to shift from Park into Reverse.
 
If anyone that is reading this has had a similar experience with their Toyota Sienna, please reply ASAP. Thank you. My husband and I think it is of the utmost importance that this vehicle be recalled.
#34 of 65
Re: Has anyone experienced a Toyota Sienna moving after it is placed in park? [shaina1] by petl
Feb 19, 2008 (2:50 pm)
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Replying to: shaina1 (Feb 19, 2008 12:09 pm)

I don't ever recall any vehicle moving forward when in park. I'm not a mechanic. However, this doesn't sound possible. Sudden acceleration is a problem that occurs when the vehicle is in drive, not park.
 
Could it be that you had the vehicle in neutral? Two things would be possible... 1) if the incline is towards the garage, the vehicle would have rolled and pinned you. Also, your neighbour, who is in panic mode, could have easily thought that she shifted from park to reverse. 2) when you got out of the vehicle, it was somehow accidentally nudged it into drive? Again, you neighbour is in panic mode when shifting.
 
Good luck.
#35 of 65
Uncontrolled Rapid Acceleration (Lexus) by snevets23
Feb 20, 2008 (10:05 pm)
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The following is an update to my original 2/3/07 post regarding my 1/31/07 accident involving uncontrolled rapid acceleration with my Lexus SC400. It's been over a year now and despite letters, calls, e-mails, and an inspection by an "expert" Lexus technician, the problem part(s) has never been located and, therefore, the cause remains unknown. The car remains in my driveway to date after 13 months, and no one in my family has driven it in fear of a recurrence. My husband had a similar incident with THIS car one month prior to my experience but, luckily, he was not involved in an accident. I won't trade it in for another Lexus because I won't give this manufacturer anymore new business. I hesitate selling it privately because of its past history. If I knew for certain which part was defective, I would gladly pay for its replacement so that I could have my beloved Lexus back and drive it once again without fear of accelerating uncontrollably--possibly causing another accident...or worse. Unfortunately, it is an intermittant problem making it difficult (if not impossible) to replicate the part's failure. For what it is worth, I filed a report with the National Highway Safety office but never heard from them again. From previous posts and surfing the web, I KNOW there are others who have experienced similar frightening episodes. With all of today's sophisticated technology, I find it difficult to understand why the cause of this problem cannot be solved. Thanks for listening to my tale of woe!

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