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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 07-29-2012, 02:42 PM
MSVX3 MSVX3 is offline
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Sudden unintended acceleration

Hi all,

On Friday July 27 I was slowly pulling into my driveway and suddenly my 2007 BMW X3 took off. I managed to steer all the way, missed the wall, hit a tree, drove on my neighbour's lawn and barely missed her SUV (minor scratches to the rear bumper). Finally I used the emergency brake, put it in neutral and turned the car off to stop it while the engine was still reving high. I had my foot on the brake hence the tire marks on my driveway. A simple search on internet reveals other similar incidents. I have posted a few pictures.

Best,
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  #2  
Old 07-29-2012, 04:48 PM
suthtow suthtow is offline
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Not good dude. The throttle is fly by wire, so it sounds like wires are rubbed through our there is interference. Call your dealer to see if there is warranty. Or tow it to a good Indy shop. Sorry.

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  #3  
Old 07-29-2012, 05:23 PM
IslandS52 IslandS52 is offline
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Really scary! Not sure if my wife could react well in that situation with our 08. Please report the incident to NHTSA and any resolutions from BMWNA.
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  #4  
Old 07-29-2012, 08:53 PM
nightmareuki nightmareuki is offline
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woow that sux. Ive experienced surges but never full on acceleration
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  #5  
Old 07-30-2012, 05:46 AM
SonicBoom SonicBoom is offline
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I think your bimmer saw a prowler in that bush and tried to snuff him out. You should thank your bimmer.

:-)
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  #6  
Old 07-30-2012, 08:33 AM
Frenchx3 Frenchx3 is offline
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Wow...that sucks, but all things considered, it could've been a lot worse. Nice job missing the garage and your neighbors car. Let us know what the hell happened when you figure it out.
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  #7  
Old 07-30-2012, 04:14 PM
BMW FAN95 BMW FAN95 is offline
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Originally Posted by Frenchx3 View Post
Wow...that sucks, but all things considered, it could've been a lot worse. Nice job missing the garage and your neighbors car. Let us know what the hell happened when you figure it out.
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  #8  
Old 07-30-2012, 05:38 PM
murderland murderland is offline
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next time it happens, throw it into neutral. i suggest you keep your foot on the brake while making those slow maneuvers that should give you enough time to brake harder and throw it into neutral before you hit anything.
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  #9  
Old 09-13-2012, 08:14 PM
MSVX3 MSVX3 is offline
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I got an update on this incident. I sent the X3 to a BMW dealership for investigation. I was told that the Vanos solenoid sensors were faulty causing the vehicle to surge. I don't know enough about these sensors so I will have to trust BMW. My concern is that what if they fail again? What kind of an accident am I going to end up in? If a faulty sensor can have such a serious consequence, then there is a design flaw here.
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  #10  
Old 09-14-2012, 07:25 AM
nightmareuki nightmareuki is offline
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I smell bull****
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  #11  
Old 09-14-2012, 07:46 AM
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1972ford 1972ford is offline
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I'd like a more thorough explanation than that, too. Are those sensors really able to cause wide open throttle? Scary stuff, glad you're ok! Nice quick reaction.

And I have to say, this is another reason why I prefer manual transmission cars. First reaction would be to clutch in and brake; it's hard to quickly reach over and throw an auto into neutral, even for quick-thinking people, you're going to be more immediately concerned with steering and braking while the car is still in gear...
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  #12  
Old 09-14-2012, 08:42 AM
usaret usaret is offline
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A couple of videos on the subject.






I haven't been able to find info on when BMW put brake override on all their cars.

EDIT: I just found this.

Quote:
BMW

BMW originated the electronic throttle pedal or “drive-by-wire” system in the 1988 BMW 750iL. By 1994 all BMW products sold in the United States had electronic throttle pedals. Since the very first system in 1988, every BMW Group electronic throttle system (including BMW, MINI and Rolls-Royce) has incorporated a brake override feature. The brake override feature is installed on all transmission versions: automatic, manual, sequential manual gearbox (SMG) and dual-clutch transmission (DCT).
http://www.thecarconnection.com/news...e-new-standard

Last edited by usaret; 09-14-2012 at 08:45 AM.
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  #13  
Old 09-14-2012, 12:02 PM
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Dominic49 Dominic49 is offline
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Quote:
Originally Posted by usaret View Post
A couple of videos on the subject.






I haven't been able to find info on when BMW put brake override on all their cars.

EDIT: I just found this.


http://www.thecarconnection.com/news...e-new-standard
the statement about all bmws since 94 having electronic throttles is bogus.

regardless, pushing in the clutch/slapping the shifter into neutral is very simple and something that anyone needs to be familiar with as a runaway engine can happen on ANY internal combustion car regardless of electric throttle or not.

hell on the our m54 based cars the throttle body doesn't even open until more then roughly 30% of throttle is used, the idle control valve does the grunt of the low load/low input work.
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  #14  
Old 09-14-2012, 12:36 PM
usaret usaret is offline
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Quote:
Originally Posted by Dominic49 View Post
the statement about all bmws since 94 having electronic throttles is bogus.
What is a Throttle Actuator on an E36?


http://www.realoem.com/bmw/showparts...00&hg=13&fg=15
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  #15  
Old 09-14-2012, 08:25 PM
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Evlengr Evlengr is offline
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Exclamation Smell BS

They are covering up something to avoid a major lawsuit. Sign off on NOTHING until you speak to an attorney. This is a lot more serious than just a messed up bumper.

Make sure that you get your hands on any part that is responsible.

There is no doubt in my mind they are hiding something.

If they "Threw Away" the part then get them to show a list in writing they replaced, then go to an ASE certified BMW mechanic and get them to do an evaluation and check if the parts are really replaced and look for any new parts not listed.


This is what ruins the BMW experience.......Lying.
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Last edited by Evlengr; 09-14-2012 at 09:44 PM.
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  #16  
Old 09-16-2012, 08:11 AM
UncleJ UncleJ is offline
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Well, it wasn't the "floormats". Good time to mentally review your check list for dealing with a runaway engine.
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  #17  
Old 10-01-2012, 08:27 PM
MSVX3 MSVX3 is offline
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More updates. After the BMW service center diagnosed the problem with the sensors they charged me $730 to replace the Vanos sensors. I spoke to two people including the manager of the service center to confirm that the sensors caused the surge/un-intended acceleration (exact wording on the service record that they gave me) and I was reassured that the answer is yes. I got the X3 back and called BMW Canada and complained, as a simple sensor failure should not have such a significant consequence. After a week they called me back and said their engineers assessed the issue and they believe that there is no way that the failure of Vanos sensors could have caused the unintended acceleration! Which BMW do I believe? I called the BMW service center and asked for re-imbursement for their wrong diagnosis (according to BMW Canada) but so far to no avail. I am very disappointed with BMW Canada and the way they are handling this case. The BMW Canada representative that I spoke to refused to let me speak to his supervisor. I will give them another week before I pursue legal action. BMWs are great cars but this kind of customer service is unacceptable.
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  #18  
Old 10-01-2012, 08:39 PM
nightmareuki nightmareuki is offline
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there is no way vanos sensors could have cause this. what vanos does is control the ammout of the air into the negine and the timing of the combustion(kinda like vtec in honda or vvt in toyota), there is no way it could cause acceleration of any measurable king let alone full on WOT it mostly for performance and efficiency. once i was told by a dealer that the reason there was no oil in the engine in the car i was about to test drive was because it evaporated, i still lol when think of it
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Last edited by nightmareuki; 10-01-2012 at 08:41 PM.
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  #19  
Old 10-01-2012, 08:54 PM
fivepointnine fivepointnine is offline
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a decent lawyer would be frothing at the mouth for a case like this!!!
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  #20  
Old 10-02-2012, 05:08 PM
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Dominic49 Dominic49 is offline
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Quote:
Originally Posted by usaret View Post
What is a Throttle Actuator on an E36?


http://www.realoem.com/bmw/showparts...00&hg=13&fg=15
that is used for ASC+T not for pedal--> throttle actuation
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  #21  
Old 10-03-2012, 06:30 AM
usaret usaret is offline
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Quote:
Originally Posted by Dominic49 View Post
that is used for ASC+T not for pedal--> throttle actuation
Thank you.

You seem to be knowledgeable on the subject...... when did BMW go 100% electronic throttle? And did they all have brake override from day one or was that feature added later on?
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  #22  
Old 12-01-2012, 02:32 PM
MSVX3 MSVX3 is offline
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Thanks everyone for your comments. At the end BMW did nothing for me. Traded in for an 09 X5 and got a few free of charge services from the dealer that is all. End of the story...

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  #23  
Old 05-06-2014, 01:31 PM
ACT670 ACT670 is offline
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I had a very similar problem recently with my BMW 328D. Did you report this to NHTSA?
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  #24  
Old 05-06-2014, 03:38 PM
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halltristan halltristan is offline
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I had a very similar problem recently with my BMW 328D. Did you report this to NHTSA?

So you did something stupid and want to act like it's the car's fault too?


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  #25  
Old 05-06-2014, 03:48 PM
Squiddie Squiddie is offline
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The big question here is why did the emergency brake do anything while the foot brake presumably did not. The emergency brake should be much weaker.

A simple stuck gas pedal (electronics) would not disable the main brake. So to fit the symptoms you would look at a situation where the car electronics also disengaged the brakes, e.g. the esp system.
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