LEXUS
Lexus NX300h Hybrid Battery (2015–2018)
Problems, Warning Codes, Repair Options and Prices — Mobile Service in North Dallas
✓ NiMH pack under the rear seat
✓ Module repair from $700
✓ Diagnostic credited toward the repair
Quick Answer
Battery: Nickel-metal hydride (NiMH)
Location: Under the rear seat
Most common codes: P0A80 and P0A7F
Check first: Some NX300h models may still be under Lexus hybrid battery coverage — check with your VIN
Typical fix: Module repair or rebuild after testing
The NX300h is Lexus’s compact hybrid SUV, first sold in the U.S. for 2015. Its NiMH battery is under the rear seat. Early NX300h models are now reaching the age where battery testing makes sense — especially before buying a used one.
NX300h Hybrid Battery by Generation
| Item | NX300h (2015–2018) |
|---|---|
| Chemistry | NiMH |
| Location | Under the rear seat |
| Newer models | 2019+ NX300h and the later NX 350h — call us with your year |
NX300h: What Owners Should Know
- The first-generation NX300h (2015–2018 in this guide) uses a NiMH hybrid battery under the rear seat, which keeps the cargo area free.
- Lexus hybrid battery coverage on these years is 8 years / 100,000 miles for most Texas-sold cars, so some 2017–2018 NX300h models may still be covered. Check by VIN first.
- Rear-seat passengers and cargo sit above the pack and its cooling intake. Keeping that area clear helps the battery stay cool in Texas summers.
- The newer NX 350h and NX 450h+ use different systems — call us with your year.
- Check your VIN for open recalls on NHTSA.gov before paying for any hybrid repair.
Common Symptoms
- Red triangle, check engine light and “Check Hybrid System”
- Engine running more often and lower MPG
- Battery gauge swinging quickly from full to low
- Weak acceleration on hills or highway merges
- Loud battery cooling fan
- Car won’t go into READY after sitting
Problems We See Most
Weak modules
Uneven aging causes codes and lower fuel economy.
Cooling intake under the seat
Keep the intake clear. A hot pack ages faster.
Pre-purchase checks
Buying a used NX300h? Our pre-purchase hybrid battery inspection starts at $200.
Warning Codes on the NX300h
On the NX300h, a worn pack usually sets P0A80 or P0A7F, often with P3000 or an INFO code. A blocked under-seat intake can also set cooling codes. We confirm every code with block-voltage and load testing before recommending anything — see our hybrid error code guide.
NX300h Hybrid Battery Prices
| Service | Price (tax and mobile service included) |
|---|---|
| On-site full diagnostic | $150 in our North Dallas service area ($200 elsewhere in DFW) — credited toward the repair |
| Full pack rebuild | Quoted after testing — call for a price |
| Module repair (only weak modules replaced) | From $700 labor + parts |
| External pack charge (car sat too long / pack drained) | From $300 — see hybrid battery charging |
| Pre-purchase hybrid battery inspection | From $200 |
| Full battery replacement | Call for a quote |
Final price is confirmed after testing. Warranty runs from 1 to 3 years depending on the vehicle’s condition and mileage, in writing before work begins. See our full hybrid battery price list.
How DFW Hybrid Battery Handles a NX300h
We read every code and info code, check block voltages at rest and under load, inspect the battery cooling fan and intake, test the 12V battery, and show you the numbers before you decide on a module repair or a full rebuild.
Real NX300h jobs — coming soon
We publish real repair notes, test data and customer reviews for every model we work on. Had your NX300h checked by us? Leave a Google review — or see our repair case studies for similar hybrids.
Frequently Asked Questions
Do you inspect an NX300h before purchase?
Yes. Pre-purchase hybrid battery inspection starts at $200.
Is the NX300h battery the same as the RAV4 Hybrid?
They share Toyota hybrid technology of the same era, but we confirm parts by VIN before quoting.
Can you inspect an NX300h before I buy it?
Yes. Pre-purchase inspection from $200.
Other Lexus hybrids we service: CT200h · ES300h · HS250h · RX400h / RX450h · GS450h · All Lexus models
Related: Prices · All vehicles · Hybrid Error Codes · Battery Charging · Diagnostics · Warranty · Areas We Serve
NX300h Hybrid Warning?
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