LEXUS
Lexus RX400h & RX450h Hybrid Battery
Problems, Warning Codes, Repair Options and Prices — Mobile Service in North Dallas
✓ Full pack rebuild $2,400
✓ Real RX400h rebuild case study
✓ Mobile service — we come to you
Vehicles › Lexus › RX400h / RX450h
Quick Answer
Battery: NiMH, about 288 V, 30 modules
Models: RX400h (2006–2008) and RX450h (2010–2015) and RX450h (2016–2018, call for a quote)
Location: Under the rear seat
Common codes: P0A80, P3000, P3030 and other voltage-sensing codes
Full pack rebuild: $2,400
The RX400h and RX450h are heavy luxury SUVs with large 288-volt packs. Under-seat mounting means spills and water can reach the battery, and age and heat wear out the modules. A rebuild costs a fraction of a new dealer pack.
RX Hybrid Battery by Generation
| Item | RX400h (2006–2008) | RX450h (2010–2015) | RX450h (2016–2018) |
|---|---|---|---|
| Chemistry | NiMH | NiMH | NiMH |
| Pack | 30 modules × 9.6 V — about 288 V | 30 modules × 9.6 V — 288 V | Confirmed by VIN before quoting |
| Location | Under the rear seat | Under the second-row seat | Under the rear seat |
| Full pack rebuild | $2,400 | $2,400 | Call for a quote |
Real Case: 2006 RX400h
We rebuilt a 2006 RX400h with a severe battery failure (P3030/P3000) and several modules near zero volts — all 30 modules rebuilt, the relay assembly and cable replaced, then balanced and tested. Read the RX400h rebuild case study.
See a real RX450h Battery Health Report
A 2011 RX450h at 140,713 miles: all 15 battery blocks between 21.470 V and 21.759 V, internal resistance 0.026–0.028 Ω, written down before any quote. View the sample report →
Real case: 2011 RX450h full rebuild in Grand Prairie
All 30 modules replaced with modules that held more than 7,500 mAh on charge and 5,000 mAh on discharge; final block spread 0.089 V. Read the case study →
Common Symptoms
- “Check Hybrid System” or VSC/master warning
- Loss of power, especially on hills
- Engine running constantly
- No READY after sitting
- Corrosion from spills or water under the rear seat
Repair Options
Module repair
Only weak modules replaced and the pack balanced. Labor from $700 plus parts.
Full pack rebuild — $2,400
All 30 modules replaced with tested and matched reconditioned modules (not new) and the pack balanced. Includes tax, removal, reinstallation and mobile service.
Corrosion and water damage
Bus bars, terminals and the relay assembly are inspected — corrosion can cause voltage-sensing codes even with good modules.
Lexus RX400h / RX450h 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 (all 30 modules) | $2,400 |
| 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 |
| 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 an RX Hybrid
We read every code, check block voltages and insulation, inspect for corrosion and water damage, test the 12V battery, and give you the price before any work begins.
★★★★★What customers say
“Jay did a great job diagnosing our hybrid battery on our Lexus RX450h. He was very thorough and presented us with several options. We decided to go with the modules replacement. Turn around time on the repair was very reasonable. He made sure the checks after the repair was good across the board and we were satisfied. He takes pride in his work and its shows.”
— H. N. · read their RX450h case study
Frequently Asked Questions
Why is the RX rebuild more than a Prius?
The RX pack is larger (about 288 V, 30 modules) and takes longer to remove, rebuild and balance.
Do you work on newer RX450h models?
Call us with your year — pricing depends on the exact model and battery.
Can water damage be repaired?
Often yes, if caught before modules and electronics are badly corroded.
Check your VIN for open recalls on NHTSA.gov before paying for any hybrid repair.
Other Lexus hybrids we service: CT200h · ES300h · HS250h · NX300h · GS450h · All Lexus models
Related: Prices · All vehicles · Hybrid Error Codes · Battery Charging · Diagnostics · Warranty · Areas We Serve
RX Hybrid Warning?
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