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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Siren Sound



View Poll Results: Are you Expierencing Siren noise
Yes but only when oil temps are low 58 34.52%
Yes all the time but not as loud when the oil is at operating temp. 49 29.17%
not at all 61 36.31%
Voters: 168. You may not vote on this poll

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      03-11-2010, 03:38 PM   #1
ridin135
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Siren Sound

No its not another one of these type of threads. I am just curious how many people are having these symptoms.
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      03-11-2010, 04:13 PM   #2
Ilma
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I don't think you are whining at all......lol.

But seriously, I am glad you started this poll.
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      03-11-2010, 04:14 PM   #3
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Voted, they updated my car to the latest progman and the sound seems to have gone away completely.
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      03-11-2010, 04:24 PM   #4
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no siren for me
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      03-11-2010, 04:44 PM   #5
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Quote:
Originally Posted by jpsimon View Post
no siren for me
Other than the one behind you......

Got those turbos on yet?
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      03-11-2010, 04:46 PM   #6
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      03-11-2010, 04:50 PM   #7
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I have a little of it when the oil is cold. Took it to two different dealers and they say its totally normal.
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      03-11-2010, 06:13 PM   #8
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Quote:
Originally Posted by Ilma View Post
Other than the one behind you......

Got those turbos on yet?
yes sir
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      03-11-2010, 06:48 PM   #9
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Any body feel like there is a power loss. I can't tell if I am just used to the power or if I am loosing some. It doesn't feel fast to me anymore
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      03-11-2010, 06:52 PM   #10
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I hear it when I first get going after startup then goes away very quickly. I hope its nothing. kinda annoying.
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      03-11-2010, 06:53 PM   #11
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They actually blamed it on the transmission.
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      03-11-2010, 06:55 PM   #12
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Quote:
Originally Posted by lpphreakx06 View Post
They actually blamed it on the transmission.
lol
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      03-11-2010, 08:00 PM   #13
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you mean a high pitch whine when you first start the car on a cold night? if so I have it and its annoying for 30 secs till I dont notice it anymore
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      03-12-2010, 12:00 AM   #14
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Quote:
Originally Posted by ridin135 View Post
Any body feel like there is a power loss. I can't tell if I am just used to the power or if I am loosing some. It doesn't feel fast to me anymore
Nope....no loss in power with either set of turbos.
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      03-12-2010, 02:58 AM   #15
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Quote:
Originally Posted by lpphreakx06 View Post
They actually blamed it on the transmission.
Yeah both dealers said the same thing. I don't remember the technical term they used. No power loss here actually the car never felt stronger.
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      03-12-2010, 07:52 AM   #16
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They just upgraded my car to the latest program, and now I hear the low tone whirrrr of the turbos under moderate acceleration. Never ever noticed it before. I have only noticed it when the car is cold and the radio is off.
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      03-12-2010, 11:38 AM   #17
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I forgot the turbines are to be completely silent...
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      03-12-2010, 11:54 AM   #18
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Quote:
Originally Posted by Dr_Dirt View Post
They just upgraded my car to the latest program, and now I hear the low tone whirrrr of the turbos under moderate acceleration. Never ever noticed it before. I have only noticed it when the car is cold and the radio is off.
It's a low pitch whirring sound....right?
As opposed to a siren-like high pitch sound?
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      03-12-2010, 12:24 PM   #19
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It is quite audible when the car is just started, but after a little while it goes away. After a hard thrashing at the drag strip this past weekend, the sound is louder now, but the car still pulls like a bat out of hell, no problems.

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      03-12-2010, 04:15 PM   #20
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Funny thing with mine is that if I beat on the car and get it nice and warm.....the siren noise almost disappears entirely for the duration of the drive.
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      03-12-2010, 04:41 PM   #21
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I can hear mine when it is hot only with the radio off and slowly going to 3k and a little above
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      03-12-2010, 04:50 PM   #22
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