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GPS Antenna Replacement - Cutting out rear windshield??

Discussion in 'Model S' started by Snipealot, May 1, 2018.

  1. Snipealot

    Snipealot Member

    Joined:
    Mar 10, 2018
    Messages:
    85
    Location:
    Frederick, MD
    So I have been having intermittent issues with my 2017 MS75 losing GPS signal - meaning it would get stuck and not update the location which obviously causes Nav not to function but also causes TACC and Autopilot to not work.

    Was told this morning after a remote diagnosis that my GPS antenna needed to be replaced, I asked if this was something I could wait for or drop off and was told that it would take 3-4 hours because they need CUT out the rear windshield to replace!!! WTF!! Seriously...does this sound right to anyone?
     
  2. artsci

    artsci Sponsor

    Joined:
    May 10, 2012
    Messages:
    6,191
    Location:
    Timonium, Maryland
    Yes, it’s correct. My GPS has failed twice in 5 years and both times Tesla service had to replace the rear window. Foolish engineering design? For sure.
     
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  3. Snipealot

    Snipealot Member

    Joined:
    Mar 10, 2018
    Messages:
    85
    Location:
    Frederick, MD
    Well that certainly sucks, I have my rear windshield tinted. You think they will reimburse me for getting it re-done?
     
  4. glhs272

    glhs272 Unnamed plug faced villian

    Joined:
    Aug 21, 2013
    Messages:
    901
    Location:
    Burlington, WI
    I have had my GPS antenna (and wire harness) replaced. Yes the rear window needs to be removed to gain access to it. The rear window is glued in place. So it has to be un-glued (cut out). Typically, it also means the rear center tail light needs to be replaced as well, as that is also glued to the rear window. In my case the window itself was not damaged, and simply was re-glued back in place. This was all done outside of warranty. Total $800.00 ($380 in parts, $420 in labor).
     
    • Informative x 1
  5. artsci

    artsci Sponsor

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    Don’t think they’ll pay for the re-tinting. I had to do mine over twice.
     
  6. ArizonaP85

    ArizonaP85 Member

    Joined:
    Apr 6, 2017
    Messages:
    238
    Location:
    Phoenix
    Since your problem is intermittent and may just be a loose wire, you should ask the service center to check all wiring harness connections BEFORE cutting out your rear window. Too many mechanics nowadays are "parts swappers" vs. diagnosticians and they fail to check the simple things first and instead default right to what part they (think they) need to replace.

    A friend waited weeks in Arizona summer heat without AC for a back-ordered HVAC fan at a major automaker's dealer for an almost new car, only to find out they never needed a new fan at all: the factory had failed to lock the harness connectors together properly. That possibility never occurred to the "parts swapper" mechanic.
     
    • Helpful x 1
  7. scottycs

    scottycs Member

    Joined:
    Jun 19, 2017
    Messages:
    157
    Location:
    Charlotte, NC
    ugh...Mine is in for this now. Did they damage the rear hatch at all?
     
  8. EVCarGUy

    EVCarGUy Member

    Joined:
    Sep 28, 2016
    Messages:
    263
    Location:
    California
    Have you installed rear facing camera in the rear hatch window? My Blackvue would sometimes cause GPS issues until I unplugged its cable from the front camera unit.
     

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