NiMH
Toyota Avalon Hybrid 2019-2022 (AXXH50) Hybrid Battery
The Toyota Avalon Hybrid 2019-2022 (AXXH50) Hybrid Battery is the high voltage battery in the Toyota Avalon Hybrid (2019-2022).
Specifications
| Chemistry | NiMH |
|---|---|
| Cell format | prismatic |
| Nominal voltage | 244.8 V |
| Modules | 34 |
| Module voltage | 7.2 V |
| Cooling | air-cooled; battery cooling blower assembly |
| Location | cabin area under the rear seat |
Cars That Use It
- Toyota Avalon Hybrid 2019-2022 Run the checklist
What Goes Wrong
Reported failures, each from a source listed below, as of October 7, 2026.
- Toyota service bulletin T-SB-0074-20 (August 2020) covers 2013-2020 Avalon Hybrid vehicles that store DTC P0A80/P1AC000 and/or P0A7F/P1A8000 because dust or debris has built up in the HV battery cooling fan or intake filter; when those codes are present the bulletin's procedure calls for replacing the HV battery and cleaning the cooling fan and filter. (static.nhtsa.gov: MC-10179698-9999.pdf, 2026-10-07)
Symptoms
- Toyota service bulletin T-SB-0074-20 describes the malfunction indicator lamp (MIL) coming on with DTC P0A80/P1AC000 and/or P0A7F/P1A8000 stored on 2013-2020 Avalon Hybrid vehicles when the HV battery cooling fan or intake filter is clogged with dust or debris. (static.nhtsa.gov: MC-10179698-9999.pdf, 2026-10-07)
- Toyota's 2020 Avalon Hybrid Warranty & Maintenance Guide lists cleaning the HV battery cooling intake filter as an added maintenance item for vehicles used with extensive idling or long low-speed driving (such as police, taxi or delivery use). (techinfo.toyota.com: T-MMS-20AvalonHV.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.
- Toyota Camry Hybrid 2007-2011 (XV40/AHV40) Hybrid Battery
- Toyota Camry Hybrid 2012-2017 (XV50/AVV50) Hybrid Battery
- Toyota Camry Hybrid 2018-2024 (XV70/AXVH71) NiMH Hybrid Battery
- Toyota RAV4 Hybrid 2016-2018 (AVA44) Hybrid Battery
- Toyota RAV4 Hybrid 2019-2025 (AXAH54) NiMH Hybrid Battery
- Toyota Avalon Hybrid 2013-2018 (AVX40) Hybrid Battery
Warranty
Toyota's 2020-2022 Avalon Hybrid Warranty & Maintenance Guides list a Hybrid Battery Warranty of 10 years or 150,000 miles from the in-service date, whichever comes first; the 2019 Avalon Hybrid guide instead lists the hybrid battery under the 8 year (96 month) / 100,000 mile Hybrid System Warranty. (techinfo.toyota.com: T-MMS-20AvalonHV.pdf, 2026-10-07)
Get This Pack Tested
Do not open it yourself. The pack can hurt you with the car switched off.
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.