2019-2020 Prime brake assist recall

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

  1. mistermojorizin

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    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."
     
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  2. bisco

    bisco cookie crumbler

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    the hits just keep on coming
     
  3. Montgomery

    Montgomery Senior Member

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    I saw this yesterday. Man, Toyota needs to step it up with it's 3rd party vendors. This is going to cost them.
     
  4. bisco

    bisco cookie crumbler

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    i wonder if the brake components are too complicated to successfully mass produce?
     
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  5. Montgomery

    Montgomery Senior Member

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    Good question. My 2015 hasn't been hit with any recall issues that I am aware of yet. I hope it stays that way.
     
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  6. mistermojorizin

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    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?
     
  7. bisco

    bisco cookie crumbler

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    just a bad run maybe
     
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  8. Trollbait

    Trollbait It's a D&D thing

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    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.
     
  9. ChapmanF

    ChapmanF Senior Member

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    From RMISC-19V544-8456.pdf linked on the NHTSA page:

    and as to the cause:

     
  10. PT Guy

    PT Guy Active Member

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    Maybe a different supplier.
     
  11. will the engineer

    will the engineer Active Member

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    welp time to take in my vehicle
     
  12. ChapmanF

    ChapmanF Senior Member

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    Hmm, I guess they did give a production date range for the cars. I overlooked it the first time.

    k0l.png
     
  13. ctscoob

    ctscoob Junior Member

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    My ‘20 isn’t part of the recall. You can plug your VIN in on that site above to see if you’re affected.
     
  14. mistermojorizin

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    when you put your vin in, does the recall come up for you on the nhtsa site?
     
  15. m8547

    m8547 Active Member

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    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).
     
  16. ChapmanF

    ChapmanF Senior Member

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    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.
     
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  17. Montgomery

    Montgomery Senior Member

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    I didn't know that. This is good to know.
     
  18. Trollbait

    Trollbait It's a D&D thing

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    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.
     
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