BMW 1-Series Forum (F20) 135i - > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > F21 M140i quiet exhaust solutions
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      08-05-2020, 04:02 AM   #1
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Drives: BMW F21 M140i
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F21 M140i quiet exhaust solutions

Hello everyone,

Weird request I guess but I'm looking for a exhaust system that it will be as quiet as possible on cold start. Does anyone have anything to recommend?
Do I have to code maybe something and if yes which coding tool do you recommend?

Thank you in advance.
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      08-05-2020, 06:12 PM   #2
No one

Drives: F21 118i
Join Date: Oct 2014
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Name:  BMW Motorsport Ear Plugs.jpg
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More seriously, if your car has stock/OEM exhaust untampered and properly operating it must (at least) conform to your country's legislation as it is.

Regarding "properly operating" you should have a flap (#11) there and it affects the sound:


(They say it works differently in M135i and M140i.)

So, if you wish to play with it, they say you can use Bimmerlink.

Last edited by No one; 08-06-2020 at 08:33 AM.. Reason: Spelling correction.
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