2019-2020 Prime brake assist recall

Discussion in 'Prime Main Forum (2017-2022)' started by mistermojorizin, Aug 16, 2019.

Page 1 of 2
  1. mistermojorizin

    mistermojorizin Active Member

    Joined:
    Jun 12, 2019
    310
    137
    0
    Location:
    usa
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Advanced
    2019 TOYOTA PRIUS PRIME | NHTSA

    Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2019 Lexus LS500, LC500, ES300h, UX250h, LS500h, Toyota Prius, RAV4 HV, 2019-2020 Toyota Prius Prime, and 2020 Corolla HV vehicles. The brake booster pump may fail causing a deactivation of the Vehicle Stability Control system and a loss of braking assist. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control Systems."
     
    #1 mistermojorizin, Aug 16, 2019
    GTprii likes this.
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    113,715
    51,752
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    the hits just keep on coming
     
    #2 bisco, Aug 16, 2019
    will the engineer and Arctic_White like this.
  3. Montgomery

    Montgomery Senior Member

    Joined:
    Sep 11, 2015
    2,254
    2,241
    2
    Location:
    Orange County, CA
    Vehicle:
    2015 Prius
    Model:
    Two
    I saw this yesterday. Man, Toyota needs to step it up with it's 3rd party vendors. This is going to cost them.
     
    #3 Montgomery, Aug 16, 2019
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    113,715
    51,752
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i wonder if the brake components are too complicated to successfully mass produce?
     
    #4 bisco, Aug 16, 2019
    Montgomery likes this.
  5. Montgomery

    Montgomery Senior Member

    Joined:
    Sep 11, 2015
    2,254
    2,241
    2
    Location:
    Orange County, CA
    Vehicle:
    2015 Prius
    Model:
    Two
    Good question. My 2015 hasn't been hit with any recall issues that I am aware of yet. I hope it stays that way.
     
    #5 Montgomery, Aug 16, 2019
    GTprii likes this.
  6. mistermojorizin

    mistermojorizin Active Member

    Joined:
    Jun 12, 2019
    310
    137
    0
    Location:
    usa
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Advanced
    I wonder why it started with the 2019 generation of hybrids and lexus non-hybrids.They've been making the Gen4 since 2016MY. It's not like it's a new design. Wonder what changed?
     
    #6 mistermojorizin, Aug 16, 2019
  7. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    113,715
    51,752
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    just a bad run maybe
     
    #7 bisco, Aug 16, 2019
    Trollbait likes this.
  8. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    23,375
    12,468
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    Brake booster pumps have been used in diesels for as long as diesels have had power boosted brakes. The pumps and accumilators are also in turbocharged gas engines.
     
    #8 Trollbait, Aug 16, 2019
  9. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    27,345
    17,950
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    From RMISC-19V544-8456.pdf linked on the NHTSA page:

    and as to the cause:

     
    #9 ChapmanF, Aug 16, 2019
    jb in NE, Trollbait and mistermojorizin like this.
  10. PT Guy

    PT Guy Senior Member

    Joined:
    Nov 23, 2016
    1,085
    711
    0
    Location:
    Washington, the state
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Advanced
    Maybe a different supplier.
     
    #10 PT Guy, Aug 17, 2019
  11. will the engineer

    will the engineer Active Member

    Joined:
    Feb 13, 2019
    238
    119
    0
    Location:
    LA
    Vehicle:
    2019 Prius Prime
    Model:
    Plug-in Advanced
    welp time to take in my vehicle
     
    #11 will the engineer, Aug 17, 2019
  12. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    27,345
    17,950
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Hmm, I guess they did give a production date range for the cars. I overlooked it the first time.

    k0l.png
     
    #12 ChapmanF, Aug 18, 2019
  13. ctscoob

    ctscoob Junior Member

    Joined:
    Aug 9, 2019
    56
    36
    0
    Location:
    CT
    Vehicle:
    2020 Prius Prime
    Model:
    Limited
    My ‘20 isn’t part of the recall. You can plug your VIN in on that site above to see if you’re affected.
     
    #13 ctscoob, Aug 18, 2019
  14. mistermojorizin

    mistermojorizin Active Member

    Joined:
    Jun 12, 2019
    310
    137
    0
    Location:
    usa
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Advanced
    when you put your vin in, does the recall come up for you on the nhtsa site?
     
    #14 mistermojorizin, Aug 18, 2019
  15. m8547

    m8547 Senior Member

    Joined:
    Aug 8, 2018
    946
    626
    0
    Location:
    Colorado
    Vehicle:
    2018 Prius Prime
    Model:
    Prime Plus
    The 4runner has had an electric brake booster since 2003, I think. It is surprisingly reliable even though it seems like it wouldn't be. But if it fails it's really bad (can lose power brakes) and really expensive to replace ($700 used or $2000+ new).
     
    #15 m8547, Aug 19, 2019
  16. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    27,345
    17,950
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    My first car didn't even have power brakes to lose. My next two did, but they were vacuum-based and could only give you maybe two or three banked-up brake strokes if the engine stalled and stopped pulling vacuum, and they had no warning beep.

    The electric-pumped accumulator in the Prius holds enough fluid under pressure for around thirty uses of the brake with full power assist if the pump stops working ... and for the last ten or fifteen of those, you'll have the infernal beeping to warn you that something's not right.
     
    #16 ChapmanF, Aug 19, 2019
    Curlyone likes this.
  17. Montgomery

    Montgomery Senior Member

    Joined:
    Sep 11, 2015
    2,254
    2,241
    2
    Location:
    Orange County, CA
    Vehicle:
    2015 Prius
    Model:
    Two
    I didn't know that. This is good to know.
     
    #17 Montgomery, Aug 19, 2019
  18. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    23,375
    12,468
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    Never counted them in the turbo Sonic, but had far more powered brake applications without engine power than the one or two in a naturally aspirated car.
     
    #18 Trollbait, Aug 20, 2019
  19. Salamander_King

    Salamander_King Senior Member

    Joined:
    Nov 8, 2015
    11,013
    8,942
    0
    Location:
    New England
    Vehicle:
    Other Electric Vehicle
    Model:
    N/A
    Trying to set up a new service record data on the DriverSide page, I just noticed there is a safety recall on 2020 Prius Prime. I checked at NHTSA site, but my 2020 Prime LE was not affected. The recall was already out last year 2019-07-24, I wonder how many 2020 models were affected?
     
    #19 Salamander_King, Sep 21, 2020
  20. digitalundertaker

    digitalundertaker Junior Member

    Joined:
    Jun 22, 2020
    17
    7
    0
    Location:
    Sacramento, CA
    Vehicle:
    2020 Prius Prime
    Model:
    XLE
    Completely different operation. Break booster on hybrids can't rely on vacuum from the engine, at least Toyota. By the way those hydroboosters in Ford and dodge diesels are completely crap.
     
    #20 digitalundertaker, Sep 21, 2020
(You must log in or sign up to post here.)
Page 1 of 2