bwilson4web
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Joined: Fri Apr 29, 2016 11:59 pm
Location: Huntsville, AL

Re: Unexpected, very powerful, acceleration surge BMW i3

Tue Aug 22, 2017 3:55 am

ks2017 wrote:Hi ASUN,
My wife has experienced the same trouble during to park it in to our garage on last week.
The car is 2015 Rex.
After she has stopped the vehicle in front of the porch, it showed some kind of fault message on display.
And suddenly it start to accelerate and run against the stairway in front of the porch.
The car is loaner vehicle from BMW dealer and waiting for delivery of i3...
She had a whiplash injury and hospitalized yesterday...
I am waiting for the report from dealer of BMW..
When we've got the report from them, I would like to share it.

Did the airbags deploy?

The reason I ask is after the 'unintended acceleration' claims against Toyota in 2009, all car manufactures are required to have accident data recorder, a type of black-box. One reason for embedding them with the airbags is they often have a capacitor with enough energy to record the data in nonvolatile memory. An airbag is fairly effective as an accident signal.

Several 'lessons learned' from Toyota's experience:
  • accelerator pedal has two 'pots/sensors' - these should have different slopes so a simple short can not lead to a false, acceleration signal. Any combination of ground and short should lead to an error and the car going into 'safe hold' mode or even disabled. The Gen-1 Prius had mechanical pots and there were known to put the car in 'safe home' mode also called 'the big hand syndrome.'
  • brake and accelerator pedals are too close - studies of Toyota accidents are consistently showing the accelerator was floored instead of the brake. HOWEVER, each case must be evaluated individually using data, not speculation!

Bob Wilson
Last edited by bwilson4web on Wed Aug 23, 2017 7:19 pm, edited 1 time in total.
20k/27k mi 2014 BMW i3-REx
10k/10k mi 2017 Prius Prime

ks2017
Posts: 5
Joined: Mon Aug 21, 2017 5:56 pm

Re: Unexpected, very powerful, acceleration surge BMW i3

Tue Aug 22, 2017 7:25 am

No. airbags didn't deploy at that moment.
Front left side of the bumper had corrupsed.
We live in Japan. So there is a hundle in right side..

I hope the data log in that moment would solve that accident if available.

I suppose it will take a time for them to analyze the route cause of that trouble..

ASUN
Posts: 131
Joined: Mon Nov 09, 2015 10:25 am
Location: Vancouver, BC

Re: Unexpected, very powerful, acceleration surge BMW i3

Tue Aug 22, 2017 11:17 am

ks2017 wrote:Hi ASUN,
My wife has experienced the same trouble during to park it in to our garage on last week.
The car is 2015 Rex.
After she has stopped the vehicle in front of the porch, it showed some kind of fault message on display.
And suddenly it start to accelerate and run against the stairway in front of the porch.
The car is loaner vehicle from BMW dealer and waiting for delivery of i3...
She had a whiplash injury and hospitalized yesterday...
I am waiting for the report from dealer of BMW..
When we've got the report from them, I would like to share it.


This issue occurred while the car is stopped. Oh my! Hope you wife is alright.

Please do keep us updated of this matter, and take care.
- ASUN, 2016 BMW i3 BEV, Arravani Grey, Suite Interior, 20's, since Oct 25, 2015

ks2017
Posts: 5
Joined: Mon Aug 21, 2017 5:56 pm

Re: Unexpected, very powerful, acceleration surge BMW i3

Tue Aug 22, 2017 3:47 pm

Hi Bob
Thank you for your comment.
Any update has informed from BMW, I will share it with you all.

ks2017
Posts: 5
Joined: Mon Aug 21, 2017 5:56 pm

Re: Unexpected, very powerful, acceleration surge BMW i3

Thu Sep 14, 2017 6:28 am

Hi,
The dealer of the BMW inspected logs. But they couldn't find any fault in the car.
After discussion with them, they have suggested us to replace the Accelerator pedal.
And update its software to the latest one.

Tomorrow we'll be hand over from them.
I can't believe that was caused by some noise from train passing..
Our house is located next to railroad track.

We will take care during our drive..

Thank you.

nitramluap
Posts: 102
Joined: Thu Jul 14, 2016 12:43 am
Location: Not the USA

Re: Unexpected, very powerful, acceleration surge BMW i3

Thu Sep 14, 2017 2:21 pm

I'm not a betting man, but if I had to I'd bet it was user error, despite what you might want to believe... and she's willing to admit.

ks2017
Posts: 5
Joined: Mon Aug 21, 2017 5:56 pm

Re: Unexpected, very powerful, acceleration surge BMW i3

Fri Sep 15, 2017 7:30 am

May be..
I don't want to believe it. But there is nothing to prove it..
Will take caution during to drive it by herself.

nitramluap
Posts: 102
Joined: Thu Jul 14, 2016 12:43 am
Location: Not the USA

Re: Unexpected, very powerful, acceleration surge BMW i3

Fri Sep 15, 2017 10:45 pm

ks2017 wrote:May be..
I don't want to believe it. But there is nothing to prove it..
Will take caution during to drive it by herself.


Well, the flipside is that you're suggesting that this car can suddenly lurch forward all by itself without any input and with no identifying cause... which would potentially trigger an international recall if true - that is a Very Big Deal™️. That makes me think it's not true and BMW is just being polite by suggesting changing the pedal.

I've seen plenty of people put ICE vehicles through walls - or worse - when 'stopped'... but they forgot to put in in 'P' (for an automatic) and then accidentally hit the accelerator pedal while fiddling with something. It happens.

It's almost certainly the reason why the i3 goes into 'P' automatically as soon as the driver's door is opened. Very wise decision by BMW.

ilya335
Posts: 3
Joined: Mon Jan 01, 2018 8:00 pm

Re: Unexpected, very powerful, acceleration surge BMW i3

Mon Jan 01, 2018 8:05 pm

Just ran across this thread after an unfortunate incident in a 2017 i3.

My parents were coming home in the i3 and stopped in front of the metal entrance gate to the garage area in their townhouse.

My father reached up to press the gate button on the rear view mirror when the car suddenly took off. It ended up going through the metal gate at full throttle and then crashed into corner wall. The crash shook the whole complex and all airbags deployed in the car.

Thankfully my parents are okay but this has left us completely shocked.

alohart
Posts: 1537
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Unexpected, very powerful, acceleration surge BMW i3

Tue Jan 02, 2018 11:51 am

ilya335 wrote:Just ran across this thread after an unfortunate incident in a 2017 i3.

I believe the i3 stores a crash log so that BMW can review the last few moments prior to a collision. What did BMW tell you happened?
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

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