TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

200 mile SR+ dead.. BMS_a059 VCFRONT_a192 HVP_w028 BMS_a158

Discussion in 'Model 3' started by john94si, Jan 8, 2021.

  1. john94si

    john94si Member

    Joined:
    Dec 16, 2020
    Messages:
    45
    Location:
    Florida
    2021 SR+

    200 miles and 2 days old. It drove great until this happened. It was parked and plugged in inside the garage and I heard a bang from the rear of the car. Everything worked except would not go into FWD to Reverse.

    Had it towed. Service says it needs an entirely new RDU (rear drive unit) Parts should be here tomorrow, this happened 6 days ago. They gave me a 3 loaner (locked in chill).

    Hope this isn't going to be a lemon car. 2021-01-02 16.47.34.jpg 2021-01-02 17.45.47-1.jpg 2021-01-03 09.26.26.jpg

    Its the same that Car and Driver magazine experienced 2 years ago Our Tesla Model 3 Suffered a Catastrophic Failure While Parked (caranddriver.com)
     
    • Informative x 1
  2. camalaio

    camalaio Active Member

    Joined:
    May 28, 2019
    Messages:
    1,467
    Location:
    Vernon, BC, Canada
    Interesting that both yours and the Car & Driver one failed like this during winter. Failures while parked are weird, but the car could've been using the rear motor as a heater (to heat the battery) since it's winter. I wonder if this is part of what led to the failure.

    Anyways, hope it works out for you. Better to have it fail early and within warranty than later, but it sucks at the time for sure.
     
  3. john94si

    john94si Member

    Joined:
    Dec 16, 2020
    Messages:
    45
    Location:
    Florida
    But I live in Florida. It’s 70 here everyday
     
  4. TLLMRRJ

    TLLMRRJ Active Member

    Joined:
    Dec 19, 2019
    Messages:
    1,546
    Location:
    Houston
    Yeah, electrical things break too. I hope you aren't one of those that bought into the whole, "there's nothing to break because there's only 1 moving part" story.
     
    • Like x 1
  5. swingforeright

    Joined:
    Dec 31, 2020
    Messages:
    7
    Location:
    Orange County
    I heard that similar bang/click from the back side of the car. Sorry to hear you also had a similar experience. Hope the sc takes care of you and your vehicle
     
  6. john94si

    john94si Member

    Joined:
    Dec 16, 2020
    Messages:
    45
    Location:
    Florida
    These are the parts they are replacing in case anyone is interested

    ASY,M3,REAR,MOSFET-LC,GLOBAL
    Part #: 1120990-00-G



    [​IMG]
     
    • Informative x 2
    • Like x 1
  7. beachsideev

    beachsideev Member

    Joined:
    May 23, 2020
    Messages:
    212
    Location:
    usa
    Is that a picture of your actual failed drive unit? Looks pretty corroded for something with 200 miles on it if it is.
     
  8. john94si

    john94si Member

    Joined:
    Dec 16, 2020
    Messages:
    45
    Location:
    Florida
    No.. just something i found online. Basically new "engine" hope to get it back soon.. My loaner is stuck in chill mode.
     
  9. TLLMRRJ

    TLLMRRJ Active Member

    Joined:
    Dec 19, 2019
    Messages:
    1,546
    Location:
    Houston
    That would hurt when outside of warranty.
     
  10. john94si

    john94si Member

    Joined:
    Dec 16, 2020
    Messages:
    45
    Location:
    Florida
    yes i think i saw $9k new for one
     
  11. TLLMRRJ

    TLLMRRJ Active Member

    Joined:
    Dec 19, 2019
    Messages:
    1,546
    Location:
    Houston
    There are going to be some very sad people that buy used Teslas outside of warranty thinking there's nothing to break on them and they are so inexpensive to maintain when they get hit with motor and battery replacement scenarios.
     
  12. jjrandorin

    jjrandorin Moderator, Model 3, Tesla Energy Forums

    Joined:
    Nov 28, 2018
    Messages:
    6,632
    Location:
    Riverside Co. CA
    Thats no different than anyone else who buys a used car having an issue with the motor, though. These motors are less likely to fail, but that doesnt mean they never will.
     
    • Like x 2
  13. Sophias_dad

    Sophias_dad Supporting Member

    Joined:
    Jul 29, 2018
    Messages:
    886
    Location:
    Massachusetts
    I'd hope that one day soon the minimum field replaceable unit size would decrease for this sort of failure. I get it, there's a lot of power back there and connections have to be perfect, but to replace the entire rear drive unit(including motor, inverter, differential, and so on) to replace just the inverter seems completely nuts.
     
  14. beachsideev

    beachsideev Member

    Joined:
    May 23, 2020
    Messages:
    212
    Location:
    usa
    that's good!
     
  15. Gasaraki

    Gasaraki Active Member

    Joined:
    Oct 21, 2019
    Messages:
    1,158
    Location:
    Syracuse, NY
    No. While parked the Model 3 mainly uses the front motors to heat the battery because the front motors are the less efficient motors meaning they naturally generate more heat. Preheating while driving would use both motors to preheat.
     
  16. john94si

    john94si Member

    Joined:
    Dec 16, 2020
    Messages:
    45
    Location:
    Florida
    Parts arrived today... lets hope no more issues. we miss our brand new car.. the loaner just isnt the same
     
  17. camalaio

    camalaio Active Member

    Joined:
    May 28, 2019
    Messages:
    1,467
    Location:
    Vernon, BC, Canada
    OP's SR+ does not have a front motor
     
    • Like x 1
  18. leonar40

    leonar40 Member

    Joined:
    Jan 6, 2021
    Messages:
    10
    Location:
    Bloomington, IN
    That "bang" was likely an electrical component failure, so it makes sense that MOSFET was on the replacement list. Electrical components follow a bathtub curve for Mean-Time Between Failure (MTBF). Higher initially, lower steady-state level throughout their rated life, and then increasing as the part reaches end of life. You would hope that most early failures can be caught through screening but not always the case.
     
  19. camalaio

    camalaio Active Member

    Joined:
    May 28, 2019
    Messages:
    1,467
    Location:
    Vernon, BC, Canada
    That's not just a single MOSFET on the part description. Tesla does not (nor does any other modern car company) do component-level repair on the customer-facing side. Let's break it down.

    "ASY,M3,REAR,MOSFET-LC,GLOBAL"
    • ASY: Assembly. As in, whole assembled unit. In this case, a drive unit motor/inverter combo with some other bits.
    • M3: Model 3 (wait, where are the people mad about the BMW/Tesla M3 thing? even Tesla's done it! :p)
    • REAR: Well, rear.
    • MOSFET-LC: Assuming this is referring to the inverter/VFD portion of the assembly being a MOSFET-based one that is liquid-cooled (LC)
    • GLOBAL: Part is suitable for all countries, not specific to any particular one.
    As for the bang, it's heard a lot. It could be the pyro fuse (which goes off with a bang intentionally), but I don't think it is in this case (you'd get 12V support warnings since the main battery would be disconnected). People generally report the car jerking suddenly along with the bang on rear motor failures, indicating the noise may be mechanical in nature (but electrical in failure).
     
  20. john94si

    john94si Member

    Joined:
    Dec 16, 2020
    Messages:
    45
    Location:
    Florida
    Thanks.. for the details.. the order actually has this part twice listed but yes i am only RWD.. maybe they ordered 2 just in case.
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC