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2013 e89 35i exhaust rattle problem

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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TitanTim
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2013 e89 35i exhaust rattle problem

Post by TitanTim » Sat Jun 18, 2016 3:46 pm

If under warranty then push the dealer to get the exhaust replaced as its called fobbing off. I don't see the point in disconnecting the flap to try and cure a common fault.

Tim.
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stuartinzg
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2013 e89 35i exhaust rattle problem

Post by stuartinzg » Sat Jun 18, 2016 8:43 pm

TitanTim wrote:If under warranty then push the dealer to get the exhaust replaced as its called fobbing off. I don't see the point in disconnecting the flap to try and cure a common fault.

Tim.
Tim, the "on/off" nature of the valve is crap anyway, even when it works properly. At part throttle it's quiet, then all of a sudden loud, then quiet. Naff really.
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TitanTim
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2013 e89 35i exhaust rattle problem

Post by TitanTim » Sun Jun 19, 2016 11:36 am

stuartinzg wrote:
TitanTim wrote:If under warranty then push the dealer to get the exhaust replaced as its called fobbing off. I don't see the point in disconnecting the flap to try and cure a common fault.

Tim.
Tim, the "on/off" nature of the valve is crap anyway, even when it works properly. At part throttle it's quiet, then all of a sudden loud, then quiet. Naff really.
I'm unsure what it does on my M135i, I can hear it open after 20 seconds or so from cold start and stays quiet after that, I'm guessing its function is to ensure the exhaust gasses warm the cat quicker. Thankfully mine is nice and quiet but I think I would still push BMW to replace the exhaust if became noisy, something shiny for nothing :D

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2013 e89 35i exhaust rattle problem

Post by Maniac » Sun Jun 19, 2016 8:32 pm

The flap is simply for noise emissions control and comfort.

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