Li-ion
Lexus NX 350h Hybrid Battery (2022+)
The Lexus NX 350h Hybrid Battery (2022+) is the high voltage battery in the Lexus NX 350h (2022-2026).
At a Glance
- Li-ion chemistry
- 259 volts nominal
- air cooled
Specifications
| Chemistry | Li-ion |
|---|---|
| Nominal voltage | 259 V |
| Cooling | air (battery cooling blower assembly on pack, per DM) |
| Location | Cabin area under the rear seat, concealed by carpet covers |
Cars That Use It
- Lexus NX 350h 2022-2026 AWD (FWD listed for 2026 on fueleconomy.gov) Run the checklist
What Goes Wrong
Reported failures, each from a source listed below, as of October 7, 2026.
Symptoms
- The Lexus dismantling manual says a ground-fault monitor watches for high-voltage leakage to the metal chassis while the vehicle is running; if it detects a fault, the master warning light comes on with a hybrid system warning message on the display. (techinfo.toyota.com: L-DM-017-D.pdf, 2026-10-07)
- The 2022 and 2024 NX 350h Warranty and Services Guides schedule a periodic inspection of the HV battery cooling intake filter as a maintenance item. (assets.sia.toyota.com: L-MMS-22NX350h.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
Lexus's 2022 and 2024 NX 350h Warranty and Services Guides list a Lexus Hybrid Battery Warranty of 10 years or 150,000 miles from the in-service date, whichever occurs first, with other hybrid system components at 8 years or 100,000 miles. (assets.sia.toyota.com: L-MMS-22NX350h.pdf, 2026-10-07)
Get This Pack Tested
Do not open it yourself. The pack can hurt you with the car switched off.
Sources
- techinfo.toyota.com: L-DM-017-D.pdf
- techinfo.toyota.com: L-DM-020-D.pdf
- techinfo.toyota.com: L-ERG-039-D.pdf
- lexus-cms-media.s3.us-east-2.amazonaws.com: 2022-Lexus-NX-350h-Product-Spec-Sheet.pdf
- fueleconomy.gov: 44654
- fueleconomy.gov: 46537
- assets.sia.toyota.com: L-MMS-22NX350h.pdf
- assets.sia.toyota.com: L-MMS-24NX350h.pdf
- web.archive.org: 2022-Lexus-NX-350h-Product-Spec-Sheet.pdf
- fueleconomy.gov: 46149
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 Lexus. Names and part numbers are used only to identify the vehicle and the part.