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The dreaded 12v battery needs service message

Discussion in 'Model X' started by X Fan, Apr 12, 2018.

  1. X Fan

    X Fan Supporting Member

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    #1 X Fan, Apr 12, 2018
    Last edited: Apr 12, 2018
    2 year old X, 40k miles.

    I had annual service a few weeks ago and asked team to check (all was “good”).

    But now, it's shot just when I needed to take a trip.

    Message to X community....change your 12v battery no more than 2 years out.

    Btw: getting hot here in Naples and I’ve run the HVAC on during some inside errands. I wonder if that impacts the 12v vs main battery? Anyone know?
     
  2. Tam

    Tam Well-Known Member

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    Heating/Cooling uses main battery, not 12V battery.
     
    • Informative x 1
  3. Fellsteruk

    Fellsteruk Active Member

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    2 years 40k isn’t a long time at all and even a crappy battery should be able to provide more life than that.

    I’ve had batteries last for more than twice if that, can or has the SC not tested for a defect in battery?

    Out of interest what make/model battery do Tesla use?
     
  4. K-MTG

    K-MTG Sunshade Captain of TMC

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    I had mine occur a few weeks ago within a week following the annual service. Mobile service took care of it (while they were serving my 3).
     
  5. X Fan

    X Fan Supporting Member

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    #5 X Fan, Apr 12, 2018
    Last edited: Apr 12, 2018
    Good timing.

    I had annual service last month and specifically asked about battery and they said all was good and should last for a few more years :).

    I should have just told them to replace.

    Btw: tesla Florida service must be overloaded. I called roadside service this morning and a ticket was created requiring a call back to schedule service. When no one called, I pinged again and agent told me that their Sop is now 24-48 hour call backs. Plus mobile service is only available mid next week.

    FWIW: that’s awful.

    Btw2: tesla mobile service is setup in a way that one person handles a territory and other employees cannot see/have access to that database to setup an appointment. Thus, if your advisor is MIA (which mine apparently is today) there is NO ONE who can help.

    I can’t see why it’s setup that way unless they want to keep national service availability a secret....
     
  6. Tam

    Tam Well-Known Member

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  7. X Fan

    X Fan Supporting Member

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    ^^^^
    Good news is we get two years with the X :)
     
  8. mathwhiz

    mathwhiz Supporting Member

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    Excerpted from TeslaTap's excellent Tesla info site:

    Undocumented | TeslaTap
    • 12 V, 33 Ah sealed absorbed glass mat deep cycle lead-acid. It is used for most everything other than propulsion and HVAC. One vendor Tesla uses is C&D Technologies DCS-33IT battery prior to the refresh in RWD models. The refresh S uses a C&D Technologies DCS-33UNCR. The 12v battery condition is monitored with a Hella Intelligent Battery Sensor.
    Comparison to batteries used in ICE vehicle applications is pretty useless, since the use profile is completely different. Pretty sure it's scheduled to be replaced in the 2-year annual service and the monitoring system usually provides reasonable pre-notification of a failure. There are, of course, exceptions...
     
    • Informative x 1
  9. Fellsteruk

    Fellsteruk Active Member

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    Was just a surprise as I didn’t notice anything when I was looking at service items for a battery change
     
  10. X Fan

    X Fan Supporting Member

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    Good info, thanks.

    Just completed my second annual maintenance last month and it wasn’t replaced.
     
  11. mknox

    mknox Well-Known Member

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    My new Model X got the replace 12v message during my first week of ownership. Message is still on until next Thursday as my local Service Centers are out of stock. These cars seem to eat 12v batteries. My last car, a Model S had 7 or 8 during the years I owned it. The last one was in March just before I sold it, and before that it was replaced in December of 2017.
     
    • Informative x 1
  12. gjunky

    gjunky Trifecta: Solar and both cars are EVs

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    Just had the same message a couple weeks ago. Tesla told me the car warns you of the fault about three weeks in advance.
    Mobile service came out and replaced it. They have to take most of the Frunk apart to do this btw. The battery is tiny compared to an ICE.
    28K miles and close to 2 years old.
     
    • Informative x 1
  13. SueLB

    SueLB New Member

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    Got 12v message on Model X at 2.5 years 32,000 miles. Didn't have in stock ordering and will install with mobile out of Torrance Ca Service Office. Be sure to ask if part is in stock as Telsa Service will schedule without verifying that part is in stock.
     
  14. bayx

    bayx Member

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    What is the 12V used for and where is it?
     
  15. nctalkinghead

    nctalkinghead Member

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    Had mine replaced in September 2018 on a May 2016 build 90D. Message was up for 14 days before Mobile Service replaced it. Fun to watch the frunk being disassembled and put back together with no parts left over :)
     
  16. hingisfan

    hingisfan hingisfan_Mark_V

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    Just got the 12v service message after 4 years and 155,000kms on my 2014 Model S.
     
  17. SMSMD

    SMSMD Active Member

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    48,000 miles July 2016 X due soon for the service did not get warning so far.
     
  18. ToddS

    ToddS Member

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    I know I am the exception and not the rule, but be thankful when that Notice comes on. Mine just died without any notice (I did see some strange behavior from the screen - button not working sometimes, etc) and it had to be towed, etc.

    I know it's a pain, but much better than my alternative. Cheers!
     
  19. SMSMD

    SMSMD Active Member

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    I had requested for battery replacement at 60,000km service as I was embarking on a 10,000km family trip and did not want to be stranded. The Service center checked logs and said does not need to be replaced. Will request again at 80,000km which is due soon.
     

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