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Knocking in the Front

Discussion in 'Model S' started by Electric700, Jan 14, 2016.

  1. Electric700

    Electric700 Member

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    Within the past two weeks I noticed that when my Model S starts up there is often a knocking sound in the front, coming from somewhere under the dash and right behind the steering wheel. It also happens at certain times while I am driving at slower speeds and when braking, so it could be something in the braking system.

    Has anyone else had this happen? This is even with the new firmware version 7.1. When I started the update and as the systems were restarting the first time, I noticed the knocking sound then too.

    The good news is that aside from this unusual sound, everything else seems to be working well. There have been no messages or alerts either.
     
  2. ThatGoogleGuy

    ThatGoogleGuy Member

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    I actually just heard that sound after my 7.1 update as well. Although I hear it when I am outside of my car using the summon feature. The knocking seems to come from the front of car. With an empty trunk and frunk I have no clue what is making this sound either.
     
  3. Joetnr1

    Joetnr1 Member

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    I also had a knock when the 7.1 completed this morning. It was a sound I hadn't heard in the month I've owned the car. Haven't been for a drive yet but I'll post if I have any further issues.
     
  4. AgentWimplo

    AgentWimplo Member

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    I've heard something similar in the garage. Seems like its been recently since 7.1 or so....Charge related? If you hear it on summon it could be the car disengaging the parking break...usually we are in the car so you wouldn't hear it the same way.
     
  5. Electric700

    Electric700 Member

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    Thanks everyone. I'll keep monitoring it for now.
     
  6. kirkbauer

    kirkbauer Member

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    Hmm, I thought this was going to be the same thing I've had happening since it got cold. On my P85D under hard acceleration I get a knocking sound from what seems to be the front motor. The service guy said it might be the rubber motor mounts not being tight enough when cold. Of course he couldn't reproduce it but I need to get back there when it is still cold because it is pretty reproducible now.
     
  7. theslimshadyist

    theslimshadyist NashVegas!

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    To you current owners, are the reliability issues that I've been reading all over the place valid? The more time I spend in this forum the more uneasy I get that I already paid my deposit. :(
     
  8. thimel

    thimel Member

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    Our cars do get more repairs than an average car. (Mine has now had two in my ten months of ownership.)
    However, the car is so great and the service so wonderful that I am still glad I bought my Tesla.
     
  9. Larry

    Larry Member

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    My 2 yr old S had a knocking such as this and it took them a year to figure out it had to do With a damper in the front left. Sorry not exactly sure of the specifics but this was the gist of it.
     
  10. CoyoteDore

    CoyoteDore New Member

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    Owned 85d for 8 mos now. BEST CAR EVER OWNED and not one maintenance problem other than flat tire from a nail... If you like technology 'done right' and liked your test drive, I really can't imagine that you could be disappointed. Perfect? No. Better than anything else out there? BY FAR
     
  11. GasKilla

    GasKilla No Gas Know Peace

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    I have the same sound, same location. Seems like its associated with the brakes, especially when I have TACC on I hear it when the car comes to a complete stop, and then I hear it again when it releases from the stop. I don't hear it on startup.
     
  12. kirkbauer

    kirkbauer Member

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    So far this minor issue is the only problem in 6 months, better than most new cars.

    - - - Updated - - -

    Are you guys sure you aren't just hearing the brake pedal moving? Mine can be pretty loud when it engages or releases (given how quiet the car normally is).
     
  13. GasKilla

    GasKilla No Gas Know Peace

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    I think it is part of the brake system that holds the car when fully stopped. Like I said I hear it when my foot is off the pedal while using TACC. I don't think it is exactly the pedal but whatever is being used to hold the pedal.
     
  14. AmpedRealtor

    AmpedRealtor Active Member

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    You should definitely count on needing service. That way you're not disappointed. :)
     
  15. FloridaGary

    FloridaGary Member

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    If you go to any other car forum, you will see issues from new car owners regardless of who manufactures the car. No need to worry about your deposit. Your concerns will fade away once you start driving it and Tesla will take care of you if you do have a problem with your car.
     
  16. theslimshadyist

    theslimshadyist NashVegas!

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    #16 theslimshadyist, Jan 17, 2016
    Last edited: Jan 17, 2016
    Yeah, great point in that forums are a place where people are prone to share experiences and research issues. I guess I was more concerned around the level of customer service and that Tesla pride in taking care of issues and providing a high level of service to their owners.
     
  17. Electric700

    Electric700 Member

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    Good to know. Well I've been able to get it to reliably occur when I decelerate down to 4 MPH (e.g. from 20 down to 4 MPH). So, perhaps either the brakes or damper switch modes at 4 MPH and sometimes also upon startup. One of those could simply need an adjustment. Thankfully, everything else about the car is fine.

    Tesla's service center has been excellent. Even with this issue, I am still very happy with the car and would buy another one.
     
  18. Electric700

    Electric700 Member

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    Just an update, Tesla told me that this issue is not serious, so it can be reviewed by the service center at my convenience.
     
  19. onesixeight

    onesixeight Member

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    I have a P85D (95xxx VIN) and I've heard this same knocking sound when stopped at a light. I've never heard it prior to 7.1 and in the last week, hear this type of noise 3-4 times in the past week. Like others, it sounds like its coming from the front end of the car.

    I mentioned the issue to my service center and they came back with a "could not duplicate" diagnosis which is what I expected. Hopefully with more reports Tesla will address it.
     
  20. theslimshadyist

    theslimshadyist NashVegas!

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    Did they indicate what it might be?
     

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