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Technical Topics B48 4-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications Exhaust valve in sport mode - Closed in Drive, open in park?

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      04-02-2020, 05:34 PM   #1
msalisbu
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Exhaust valve in sport mode - Closed in Drive, open in park?

I have a couple threads with issues after getting my car back from the service center, mainly with iDrive, but this one is with the exhaust valve in sport mode.

I noticed what sounded like the valve closing when putting my car in drive while in sport mode. I made a video below to test the the theory, and sure enough the valve is opening while in park, then closing when put into drive.

https://streamable.com/lgm147

I can't recall this ever happening before when I bought the car, so I'm curious if this is normal or not. Does the valve open at a certain RPM similar to comfort mode? The exhaust note is also quieter and pops less.
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      04-02-2020, 05:36 PM   #2
VipinLJ
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I believe yes. It closes even in sport mode and opens up only after a certain RPM when you’re driving it.
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      04-20-2020, 11:56 PM   #3
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Quote:
Originally Posted by VipinLJ View Post
I believe yes. It closes even in sport mode and opens up only after a certain RPM when you’re driving it.
Unfortunately, since I went to 2019/11 and now 2020/03 It seems the exhaust doesn't open PERIOD in D or even M/S while in Sport now.

It really sucks
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