02-05-2014, 05:45 PM | #1 |
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M135i - Whistling Sound on Acceleration
I can hear a whistling sound on on acceleration with the windows up. Do guys get this sound as well or know what this could be?
I have searched and other M135i owners have said that the turbo can be heard. I have had other turbo cars (not BMW's) and have not heard a similar sound with the windows up. I have not taken the car past 4.5k RPM as car is still under the running in period. Thanks |
02-05-2014, 08:04 PM | #2 |
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Can't recall mine whistling. It's manual, 15000km and I usually drive with stereo off and windows up in town. Sometimes does a bit of pshhh or whsshhh.
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02-06-2014, 02:20 AM | #3 |
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it happens on mine too, can't work out where its coming from but i know its around the mirror area.
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02-06-2014, 08:42 AM | #5 |
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Turbo spooling up.Mine does it more in cooler weather.
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02-06-2014, 03:14 PM | #6 |
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With the added intake roar of my K&N filter and the bark of my M Performance exhaust I don't hear that spooling whine very often. I do hear the delicious overrun burble and occasional turbo pressure dump valve from time to time though. Love 'em.
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