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Odd noise around 110-115kms/hr under light load

Discussion in 'Model S: Driving Dynamics' started by 808 24 7, Apr 14, 2017.

  1. 808 24 7

    808 24 7 Member

    Feb 24, 2017
    2015 S 85D with around 21,000 kms.

    Noticed a slightly annoying noise coming at around 110 to 115 kms/hr (around 68 - 72 mph), only when accelerator slightly pressed, so under a light load. It's almost as if a rear window was slightly open, but it's not anything wind - as soon as I step on or release the accelerator, the sound goes away.

    It also doesn't happen at other speeds. It's like a deep rumbling noise. It's not the typical milling noise that I've been reading about.

    Service center says they can barely hear it, but will keep a lookout for any tech posts about it as they don't know what might be causing it.

    Anyone else experience something like this?
  2. jmsurpri

    jmsurpri Member

    Feb 5, 2016
    Beaverton, OR
    I've found that there is a noticeable increase in motor whine at exactly 67mph. Above or below that it disappears. I think it's just a resonant frequency.

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