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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 08-24-2012, 11:35 PM   #1
Asher454
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Clicking sound after turning car off from rear?

This sound is coming from the back of the car after I turn the car off, it's a little clicking sound almost like a flap I know other BMW's do it too, just wondering what it is?
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Old 08-25-2012, 08:22 AM   #2
SamDoe1
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Exhaust flap closing. No worries, carry on with life.
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Old 08-26-2012, 09:15 AM   #3
Asher454
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And knowing that, I will
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Old 08-28-2012, 02:41 PM   #4
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Either the flap closing or just simply the exhaust system cooling down. Catalytic converts and some mufflers have attendance to click or pop while cooling down.
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Old 10-01-2012, 04:12 PM   #5
mattfarrington
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Sometimes when I turn my car off, I hear a release of air pressure from under the hood.
I assume it's the brake booster, but is it good/bad?
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Old 10-01-2012, 05:08 PM   #6
Kubica
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Originally Posted by mattfarrington View Post
Sometimes when I turn my car off, I hear a release of air pressure from under the hood.
I assume it's the brake booster, but is it good/bad?
May be an issue with the CCV. Read some threads on that.
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Old 10-09-2012, 11:44 AM   #7
dHOFFs
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mine does something like this too although i would describe it more as a scraping or scratching
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Old 10-09-2012, 11:46 AM   #8
mattfarrington
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May be an issue with the CCV. Read some threads on that.
It's normal. It's just the TB releasing pressure. Had it checked out. because I have a few modifications to the intake.

Also, the noise of clicking is just the butterfly valve closing. That's completely normal.
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