jadnashuanh
Posts: 4339
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: Unexpected, very powerful, acceleration surge BMW i3

Tue Jul 24, 2018 1:01 am

The brakes in the i3 are mechanical (hydraulic), like nearly every other car sold today. Their power assist is electrical verses the more common vacuum assisted. If there was an electrical problem, it would take more pressure to stop, but stopping is still possible. The brakes are more powerful than the motor, but I think you'd find in the i3, if you're pressing the brake hard, it would override the accelerator pedal (but I'm not positive), as that signal is also electrical and controlled by the computer. So, even if there were a total electrical failure, the hydraulic brakes will still work. Now, if the brake pedal went to the floor, there was a mechanical problem, not an electrical one. I can't think of an electrical problem that would cause the brake pedal to go to the floor.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV

abrise
Posts: 1
Joined: Tue Jul 24, 2018 5:44 pm

Re: Unexpected, very powerful, acceleration surge BMW i3

Tue Jul 24, 2018 11:03 pm

I purchased my BMW i3 in my home state of California on August 21, 2016. And between the purchase date and May 7, 2017, we experienced 3 episodes of sudden acceleration. All 3 episodes occurred split seconds before the car was to make a complete stop.

The 1st incident occurred when my husband was attempting to park the car in our driveway. The 2nd incident occurred just as I was coming to a complete stop at a traffic light, and the 3rd, just as I was parking the car against a street curb. The 3rd incident was the scariest because the sudden acceleration caused me to collide with my tall SUV, (but fortunately just on the tire) then the BMW hit the street curve, jumped over it, and finally came to a stop just inches away from striking my husband and our small dog.

I called my BMW dealer to pick up the car and they picked it up the following day. They called in a special team from New Jersey to inspect the vehicle. A few weeks later, the inspection team inspected the car and they informed me that they found nothing wrong with the vehicle. Dealer representatives then offered to spend some time with me to show me how to properly drive the car. I'm in my mid forties and I've been driving since I was a teenager. Until recently, I was a field engineer for 13 years during which time I drove various different vehicles to work sites scattered all over southern California. So I am used to driving different vehicles ranging from small hybrid SUV's, to large work vans, trucks, and even natural gas vehicles. So trust me .... I do not need driving lessons and I was furious after hearing their insulting suggestion. (I wonder if they would ever say something like that to a man?)

Anyway, I declined their offer to give me driving lessons and I refused to take the vehicle home with me because the car is just NOT SAFE.

The car has been at the dealer's car lot since May 8, 2017 and as I write this it is July 24, 2018. I have been making all the car payments and insurance payments even though the car is not in my possession. I had no choice because neither the dealer nor BMW would work with me and because I don't want to damage my credit.

I tried to persuade the dealer to swap my BMW i3 for a different model that was similarly priced, but when we worked out the numbers, my monthly payments were going to DOUBLE.
I offered to exchange my 9 month old BMW for one of their used "service loaners" but they were not interested. And after suggesting various fair and reasonable exchange deals I noticed that they wouldn't budge, so I offered to exchange my BMW i3 for another BMW i3 but that move would ALSO result in a DOUBLING of my monthly payments.

It became clear to me that the dealer was willing to accommodate me as long as I was willing to pay the equivalent of 2 car payments. Not very accommodating at all. So far this is how BMW has dealt with me.

flyboy320
Posts: 10
Joined: Sat Jun 02, 2018 5:38 pm

Re: Unexpected, very powerful, acceleration surge BMW i3

Thu Jul 26, 2018 5:09 am

abrise wrote:I offered to exchange my 9 month old BMW for one of their used "service loaners" but they were not interested. And after suggesting various fair and reasonable exchange deals I noticed that they wouldn't budge, so I offered to exchange my BMW i3 for another BMW i3 but that move would ALSO result in a DOUBLING of my monthly payments.

It became clear to me that the dealer was willing to accommodate me as long as I was willing to pay the equivalent of 2 car payments. Not very accommodating at all. So far this is how BMW has dealt with me.


Post your experience on BMW's Facebook page, social media is the way to get companies to sit up and take notice, they hate the negative exposure.

viking79
Posts: 110
Joined: Wed Apr 16, 2014 3:04 pm

Re: Unexpected, very powerful, acceleration surge BMW i3

Thu Jul 26, 2018 6:20 am

How brakes work and how cars work I don't believe it possible for there to be an unintended acceleration not fixed by application of the brake pedal.

drivenowcardriver
Posts: 1
Joined: Thu Feb 07, 2019 3:42 am

Re: Unexpected, very powerful, acceleration surge BMW i3

Thu Feb 07, 2019 4:04 am

This happened to me Monday 04 February 2019.

This is a major safety issue and should be reported to BMW as a matter of urgency.

I am an experienced car and motorcycle driver with over 30 years of standard and advanced driving.

Just to be clear I DID NOT ACCIDENTALLY HIT THE ACCELERATOR.

I hired a BMW-i3 from the car sharing service "drive-now" in Berlin, Germany. I have driven this car previously about 6-7 times.

I had been driving the BMW i3 around town for over an hour with no issues. I was about to park it and was "creeping slowly" into a parking space when suddenly the car accelerated violently.

As I turned into the parking space the car suddenly accelerated and mounted the pavement and hit a lamp post, the car was heading towards a building wall when I managed to hit the brake at the last second and stop the car. To re-iterate I DID NOT ACCIDENTALLY HIT THE ACCELERATOR.

I was fortunate not to have hit or injured any pedestrians or crash into other vehicles.

This car is dangerous!!! I won't be driving one again.

I reported the accident to the "drive-now" car sharing service and have asked them to open an investigation and report it to BMW.

Just wanted to share my experience,.

drive safe.

bwilson4web
Forum Supporter
Posts: 652
Joined: Fri Apr 29, 2016 11:59 pm
Location: Huntsville, AL

Re: Unexpected, very powerful, acceleration surge BMW i3

Thu Feb 07, 2019 8:07 pm

There are only 11 BMW i3 complaints recorded by the USA, NHTSA.GOV web site. None of them report unintended acceleration.

Regardless, you should not drive a car that scares you. Mine is quite benign except when at a stop light with other cars. I reflexively floor the accelerator each time and love it.

If you've experienced a problem that has not been resolved, file a complaint with the NHTSA.GOV. Otherwise, it doesn't count.

Bob Wilson
20k/27k mi 2014 BMW i3-REx
10k/10k mi 2017 Prius Prime

MKH
Posts: 138
Joined: Fri Nov 02, 2018 5:48 am
Location: Dallas

Re: Unexpected, very powerful, acceleration surge BMW i3

Fri Feb 08, 2019 4:39 am

A few people have reported their i3 suddenly "accelerating". Turned out in cases reported, that If the regenerative braking system was operating and the car made a sharp turn, or hit a pothole or a bump, causing the wheels to lose traction, the traction control would disengage the regen to prevent a loss of control. When this happened, it would give the driver the sensation of sudden acceleration. When you are in full regen and it suddenly disengages, it does feel like the car is suddenly accelerating or surging ahead, when if fact it just isn’t being slowed down by the regenerative braking as expected. The system was intentionally designed to do this, to prevent the thin tires from losing traction while negotiating hard turns or rough roads. It’s not a problem as long as you are aware of how the system functions, know it could happen, and you are ready to use the friction brakes if necessary.

I've encountered this myself, at a stop-sign near my house. Couple of roughly patched potholes leading up to the sign, hit at the right speed, cause the regen to disengage, and the car feels like it's jumping forward. I have always been a "two-foot" driver (rally car racing, left-foot braking is faster and safer on the course), so braking quickly never an issue, just comes automatically. I can see where it would be unsettling and might scare a one-foot driver, unless they know about it and are ready for it.
Mark H.
2015 i3 Rex, Capparis White, Tera World, Technology & Driving Assistant, Parking Assistant, Harman Kardon Audio System, 20 inch wheels, EVoInnovate EVSE

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