TOYOTA
Toyota Avalon Hybrid Battery (2013–2018)
Problems, Warning Codes, Repair Options and Prices — Mobile Service in North Dallas
✓ 244.8-volt NiMH pack
✓ Module repair from $700
✓ Diagnostic credited toward the repair
Vehicles › Toyota › Avalon Hybrid
Quick Answer
Battery: Nickel-metal hydride (NiMH), 204 cells — about 244.8 V nominal
Location: Behind the rear seat, in the trunk
Most common codes: P0A80 and P0A7F
Related models: The Camry Hybrid and Lexus ES300h of the same years use a similar hybrid system
Typical fix: Module repair or full pack rebuild after testing
The Avalon Hybrid joined Toyota’s lineup for 2013. Its NiMH battery sits behind the rear seat, and like other Toyota hybrids of this era, it slowly loses capacity with heat and age. Many Avalon Hybrids in DFW are now past their factory battery coverage.
Avalon Hybrid Hybrid Battery by Generation
| Item | Avalon Hybrid (2013–2018) |
|---|---|
| Chemistry | NiMH |
| Cells | 204 cells (1.2 V each) |
| Nominal voltage | About 244.8 V |
| Location | Trunk, behind the rear seat |
| Cooling | Cabin air drawn by the battery cooling fan |
Avalon Hybrid: What Owners Should Know
- The 2013–2018 Avalon Hybrid uses a 204-cell, 244.8-volt NiMH pack mounted behind the rear seat — the same family of battery used in the Camry Hybrid and Lexus ES300h of that era.
- Its battery cooling fan draws air from the cabin. A clogged fan or intake raises pack temperature and speeds up module wear.
- Toyota’s hybrid battery coverage on these years is 8 years / 100,000 miles for most Texas-sold cars. A 2018 model with low miles may still be covered — check with a dealer by VIN.
- The 2019 and later Avalon Hybrid is a new generation. Call us with your year and we will confirm the battery type.
- 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
Gradual module wear
Some modules lose capacity faster. The car reacts with codes, more engine running and lower MPG.
Cooling fan and intake
A dirty fan or blocked intake raises pack temperature. We inspect it every time.
Not always the battery
Inverter, sensor and 12V faults can also set hybrid warnings. Proper testing tells the difference.
Warning Codes on the Avalon Hybrid
On the Avalon Hybrid, a worn pack usually sets P0A80 or P0A7F, often with P3000 or an INFO code. We confirm every code with block-voltage and load testing before recommending anything — see our hybrid error code guide.
Avalon Hybrid 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 Avalon Hybrid
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 Avalon Hybrid jobs — coming soon
We publish real repair notes, test data and customer reviews for every model we work on. Had your Avalon Hybrid checked by us? Leave a Google review — or see our repair case studies for similar hybrids.
Frequently Asked Questions
Do you work on the 2019+ Avalon Hybrid?
Yes. It is a newer design, so we confirm the battery type and parts by VIN before quoting.
Is the Avalon Hybrid battery the same as the Camry Hybrid?
They are closely related 244.8-volt NiMH packs, but parts and housings can differ by model and year. We confirm by VIN before quoting.
Can you rebuild an Avalon Hybrid battery?
Yes. We replace weak modules or rebuild the whole pack with tested, matched modules.
What does a diagnostic include?
Code reading, block voltages at rest and under load, cooling system check and a written report you keep.
Other Toyota hybrids we service: Prius · Prius c · Prius v · Camry Hybrid · RAV4 Hybrid · Highlander Hybrid · All Toyota models
Related: Prices · All vehicles · Hybrid Error Codes · Battery Charging · Diagnostics · Warranty · Areas We Serve
Avalon Hybrid Hybrid Warning?
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