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      09-06-2010, 04:03 AM   #1
Dr Stig 2
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Exclamation An Almighty Bang!

Guys,

I seem to remember a thread on this a few months back, but buggered if I can find it...

As I accelerated from a standing start today to merge with traffic - I heard an almighty crack or bang noise from the rear of the car.
It sounded like a small explosion.
I thought I must have hit something but I can see no damage...

Does anyone remember anyone else hearing such a nasty noise on acceleration - and if it was a problem that needed to be fixed?
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      09-06-2010, 08:15 AM   #2
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Yep, I've heard the noise, but I don't think we were able to figure out what causes it. Whenever I've heard it it's been on a rough surface with probably at least one rear wheel momentarily off the road. No idea why that would cause such a sound.
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      09-06-2010, 03:19 PM   #3
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You've heard it more than once - OMG!

Do you have the DCT tranny?
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      09-07-2010, 05:40 AM   #4
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Quote:
Originally Posted by Dr Stig 2 View Post
You've heard it more than once - OMG!

Do you have the DCT tranny?
No, manual box.
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      09-07-2010, 06:14 AM   #5
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On the way home today I was behind a car that ran over a small, empty fruitbox-type drink container and that made a massive bang like a gunshot. Are you sure you didn't run over something that could have exploded or perhaps flicked up and hit the undercarriage etc?
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      09-07-2010, 03:12 PM   #6
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I hopped out and checked the road and the car.
Nada.
I'll get it up on the hoist on Friday hopefully.
It still drives fine - no warnings, no symptoms...
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      09-07-2010, 06:22 PM   #7
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Quote:
Originally Posted by Dr Stig 2 View Post
I hopped out and checked the road and the car.
Nada.
I'll get it up on the hoist on Friday hopefully.
It still drives fine - no warnings, no symptoms...
Someone shootin' at ya?

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      09-07-2010, 10:09 PM   #8
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I don't know what you guys are hearing but is it possible you guys don't realize you're hearing the explosion in the overrun? If you're revving hard to overtake and for a split second take your foot of the gas pedal you'll get that, in ferraris and lambos it's really scary and loud but in the zed is like a small bang.
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      09-08-2010, 02:10 AM   #9
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Quote:
Originally Posted by Memphis1 View Post
I don't know what you guys are hearing but is it possible you guys don't realize you're hearing the explosion in the overrun? If you're revving hard to overtake and for a split second take your foot of the gas pedal you'll get that, in ferraris and lambos it's really scary and loud but in the zed is like a small bang.
Thanks Memphis.
I've heard the overrun. I actually try to make that sound all the time. It makes a beautiful bwaarp sound.
This was louder, and was almost like a metal on metal bang.

And Mr Breeze - I dont live in the US.
Our guv-ment bought back most of our guns in 1997.
You pretty much need to be a farmer to have one these days.
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      09-08-2010, 06:21 AM   #10
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I also drive an IS and I posted a message with the same symptoms more than a month ago http://e89.zpost.com/forums/showthread.php?t=397890, since then no more "bang". I am waiting for a second occurrence before going back to BMW. Michael.
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      09-09-2010, 05:19 AM   #11
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Originally Posted by z4mike View Post
I also drive an IS and I posted a message with the same symptoms more than a month ago http://e89.zpost.com/forums/showthread.php?t=397890, since then no more "bang". I am waiting for a second occurrence before going back to BMW. Michael.
I knew I wasn't going mad.
Thanks z4Mike.

I still want to get it up on the hoist - I have logged an incident with the service department in case its a few weeks until I can get the car to them...
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      09-10-2010, 07:14 AM   #12
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[quote=

And Mr Breeze - I dont live in the US.
Our guv-ment bought back most of our guns in 1997.
You pretty much need to be a farmer to have one these days.[/QUOTE]


Perhaps dating the Farmers' daughter isn't the best idea....

Ok, seriously, I hope you get the noise figured out!
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