Prius 2007 - Yuasa HJ-S34B20R 12V AGM battery is OK?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by IvanCS, Oct 28, 2025.

Tags:
  1. IvanCS

    IvanCS New Member

    Joined:
    Oct 28, 2025
    1
    0
    0
    Location:
    Wycombe, UK
    Vehicle:
    2007 Prius
    Model:
    N/A

    My 12V battery needs replacing. Halfords (UK) recommend Yuasa HJ-S34B20R Auxiliary AGM Battery for my Prius 2007, but am not confident they are correct.
    Is there a table online or a way to check this first?
    Thanks, Ivan
     
    #1 IvanCS, Oct 28, 2025
  2. Hayslayer

    Hayslayer Active Member

    Joined:
    Nov 6, 2024
    387
    216
    0
    Location:
    USA
    Vehicle:
    2009 Prius
    Model:
    Touring
    In North America, the 2007 with SKS uses the S46 battery, the model without SKS uses the S34. The S46 is just slightly larger and uses a slightly different mounting bracket. In reality, either battery can be used in either circumstance by modifying the bracket or ordering a new bracket from Toyota for about $25. The S46 has a bit more capacity to account for the extra electrical draw by the SKS system while the car is off.
     
    #2 Hayslayer, Oct 28, 2025
  3. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
    12,900
    2,316
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    Yuasa AGM is a great battery have em in my bikes . Kinda like old Deka
     
    #3 Tombukt2, Oct 28, 2025
(You must log in or sign up to post here.)