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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Whining Noise at High Rev's



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      01-20-2015, 11:41 AM   #1
XEN55
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Whining Noise at High Rev's

Hey Folks,

Was wondering if any of you have noticed a particular whining noise when driving in higher range RPM's (eg. 3500-4000). This noise certainly hasn't been around forever and is even more noticeable now that the weather is colder. Essentially, when I'm driving the car in M-mode and rev the RPM's up to 3500ish and let of the throttle, I hear this whining/old school sire type of noise. Any idea what could be causing this? I've taken the car to BMW who obviously wrote it off as "normal" and also to a local tuner shop which also couldn't find any issues.

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2011 E92 335i 6AT

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VRSF Charge pipe
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2011 BSM 335i (E92) - JB4 - BMS Intake - VRSF Chargepipe
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      01-20-2015, 01:06 PM   #2
JETmn
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Is it the turbo sound? It is much more pronounced with an intake on.
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      01-20-2015, 01:25 PM   #3
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Sounds like a boost leak but if the shops have investigated with no issues found that it's likely just normal
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