NiMH
Lexus RX 450h (3rd gen) Hybrid Battery (2010-2015)
The Lexus RX 450h (3rd gen) Hybrid Battery (2010-2015) is the high voltage battery in the Lexus RX 450h (2010-2015).
Specifications
| Chemistry | NiMH |
|---|---|
| Nominal voltage | 288 V |
| Modules | 30 |
| Module voltage | 9.6 V |
| Cooling | air (battery intake ducts with air intake covers in cabin, per dismantling manual) |
| Location | Cabin floor pan cross member under the second-row seat, concealed by carpet |
| Weight | 69 kg |
Cars That Use It
- Lexus RX 450h 2010-2015 FWD and AWD Run the checklist
What Goes Wrong
Reported failures, each from a source listed below, as of October 7, 2026.
- Owner complaints NHTSA lists under the Hybrid Propulsion System component for the Lexus Rx450H Hybrid, by model year: 2010: 1. These are all hybrid system complaints, owner reported and unverified, not only battery faults, as of 2026-10-07.
Symptoms
- The Lexus emergency response guide 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 and the display shows "Check Hybrid System". (techinfo.toyota.com: L-ERG-001-D.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 2013 and 2015 RX 450h Warranty and Services Guides list the hybrid battery under the Hybrid System Warranty (with the battery control module, hybrid control module and inverter with converter) for 96 months or 100,000 miles, whichever occurs first; other 2010-2015 years were not opened. (assets.sia.toyota.com: MY13_Lexus%20RX%20450h_WSG_lr.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 Lexus. Names and part numbers are used only to identify the vehicle and the part.