Hybrid Battery Test

NiMH

Toyota i-FORCE MAX Hybrid Battery (Tundra 2022+, Sequoia 2023+)

The Toyota i-FORCE MAX Hybrid Battery (Tundra 2022+, Sequoia 2023+) is the high voltage battery in the Toyota Tundra i-FORCE MAX (Tundra Hybrid) (2022-2026), Toyota Sequoia (2023-2026).

At a Glance

  • NiMH chemistry
  • 288 volts nominal
  • 40 modules
  • air-cooled; two battery cooling blower assemblies cooled

Specifications

ChemistryNiMH
Cell formatprismatic
Nominal voltage288 V
Modules40
Module voltage7.2 V
Energy1.87 kWh
Coolingair-cooled; two battery cooling blower assemblies
Locationcabin area under the rear seats (Tundra) / under the No. 2 (second-row) seats (Sequoia)

Cars That Use It

What Goes Wrong

Reported failures, each from a source listed below, as of October 7, 2026.

    Symptoms

    • Toyota's 2022 Tundra i-FORCE MAX Warranty & Maintenance Guide schedules an inspection of the HV battery cooling intake filter, with a visual check for dirt or dust every 5,000 miles and cleaning if necessary. (techinfo.toyota.com: T-MMS-22TundraHV.pdf, 2026-10-07)
    • Toyota's 2023 Sequoia Warranty & Maintenance Guide schedules an inspection of the HV battery cooling intake filter, with a visual check for dirt or dust every 5,000 miles and cleaning if necessary. (techinfo.toyota.com: T-MMS-23SequoiaHV.pdf, 2026-10-07)

    Same Electrical Spec

    These packs share this one's chemistry, voltage and module count. That is a spec match only. It does not mean the parts fit each other, so check with a technician.

    Warranty

    Toyota's 2022-2026 Tundra i-FORCE MAX and 2023-2026 Sequoia Warranty & Maintenance Guides list a Hybrid Battery Warranty of 10 years or 150,000 miles from the in-service date, whichever comes first. (techinfo.toyota.com: T-MMS-22TundraHV.pdf, 2026-10-07)

    How battery warranties work.

    Get This Pack Tested

    Do not open it yourself. The pack can hurt you with the car switched off.

    Book a battery test Find a tech near you

    How to test a hybrid battery safely

    Sources

    1. techinfo.toyota.com: T-DM-027-D.pdf
    2. techinfo.toyota.com: T-DM-028-D.pdf
    3. techinfo.toyota.com: T-ERG-087-D.pdf
    4. techinfo.toyota.com: T-ERG-089-D.pdf
    5. techinfo.toyota.com: T-ERG-0114-D.pdf
    6. pressroom.toyota.com: 2023-toyota-tundra-i-force-max
    7. gearjunkie.com: 2022-toyota-tundra-trd-pro-hybrid-review
    8. techinfo.toyota.com: T-MMS-22TundraHV.pdf
    9. techinfo.toyota.com: T-MMS-23SequoiaHV.pdf
    10. techinfo.toyota.com: T-MMS-23TundraHV.pdf
    11. techinfo.toyota.com: T-MMS-24SequoiaHV.pdf
    12. techinfo.toyota.com: T-MMS-24TundraHV.pdf
    13. techinfo.toyota.com: T-MMS-25SequoiaHV.pdf
    14. techinfo.toyota.com: T-MMS-25TundraHV.pdf
    15. techinfo.toyota.com: T-MMS-26SequoiaHV.pdf
    16. techinfo.toyota.com: T-MMS-26TundraHV.pdf

    Last updated October 7, 2026. Failure and recall notes are as of that date. Spotted a mistake, or speaking for a maker? Report an error.

    Hybrid Battery Test is independent. It is not affiliated with, sponsored by or endorsed by Toyota. Names and part numbers are used only to identify the vehicle and the part.