2004 – 2009 Toyota Prius

Description 2004–2009 Toyota Prius Hybrid Battery Genuine OEM Replacement Your 2004–2009 Toyota Prius Gen 2 was engineered for efficiency and reliability — but after 100,000 miles or more than a decade of use, the hybrid battery that powers the Toyota Synergy Drive system begins to show its age. Reduced MPG, the dreaded red triangle warning light, or a fluctuating charge indicator are all signs that your Prius needs attention. At Ace Hybrid Tech, California’s dedicated hybrid and EV battery specialists, we supply and install Genuine OEM-quality Toyota Prius hybrid batteries engineered to restore your vehicle’s original performance. With warranty options from 1 to 5 years and transparent pricing starting at $950, our Gen 2 Prius battery replacement gives you the reliability of the dealership at a fraction of the cost. Dealer replacement cost: $3,000–$4,500 Ace Hybrid Tech: Starting at $950 — same certified quality, better warranty options. Technical Specifications Specification Details Compatible Vehicles Toyota Prius 2004, 2005, 2006, 2007, 2008, 2009 Generation Gen 2 (Second Generation) Battery Chemistry Nickel-Metal Hydride (NiMH) Battery Capacity 6.5 Ah Pack Voltage 201.6 V Number of Modules 28 Battery Weight Approx. 80 lbs OEM Part Numbers G9280-47110, G9280-47100, G9510-47030 Brand Panasonic (Toyota OEM Supplier) Condition Genuine OEM / OEM-Quality Installation Professional installation required (high-voltage system) Core Exchange Required — $500 refundable deposit for non-installation orders Warranty Options — You Choose Your Coverage Warranty Plan Coverage Price Range 1-Year / 12,500 Mile Parts & Labor $950 2-Year / 30,000 Mile Parts & Labor Starting higher 3-Year / 45,000 Mile Parts & Labor Mid-range 4-Year / 60,000 Mile Parts & Labor Premium 5-Year / 75,000 Mile Parts & Labor Up to $2,600 Note: All plans include parts AND labor coverage — no hidden fees. Warranty honored at our Garden Grove, CA facility. Call us for current availability: (714) 728-9393. Why Choose Ace Hybrid Tech Over the Dealership? Real Electrical Engineers. Our team includes certified hybrid specialists with hands-on high-voltage training — not general mechanics. Exclusive Focus. We service only hybrid and electric vehicles. The Toyota Prius system is not a side job — it’s what we do every day. Industry-Leading Warranty. Our 5-year / 75,000-mile warranty is among the longest available for a Gen 2 Prius battery in California. Transparent Pricing. The price we quote is the price you pay. No surprise labor charges added at pickup. Trusted by Southern California Prius Owners. Over 15 years of hybrid-specific experience. Hundreds of Gen 2 Prius batteries installed and running strong. “Arash saved me a fortune. Period. If you have a Gen 2 Prius, just come here.” — Ardal, verified customer Signs Your 2004–2009 Prius Battery Needs Replacement If you’re experiencing any of the following, bring your Prius in for a free diagnostic: Sudden MPG drop — fuel economy falling from 45–52 MPG to 30 MPG or lower Red triangle warning light on the dashboard “Check Hybrid System” message on the multi-information display Wildly fluctuating charge bars on the hybrid battery indicator Engine running constantly — the gas engine staying on even at low speeds Sluggish acceleration or reduced electric motor response Battery cooling fan running loudly for extended periods These symptoms often indicate one or more failed modules within the 28-module NiMH battery pack. A simple diagnostic confirms whether replacement is needed. → Read our full technical guide: Toyota Prius Battery Failure Signs OEM vs. Remanufactured: What Gen 2 Prius Owners Should Know The 2004–2009 Prius uses a 28-module Nickel-Metal Hydride pack, and the balance between those modules is critical. When cells are mismatched in capacity — a common issue with low-quality remanufactured packs — the weaker cells get overworked and fail faster. Genuine OEM batteries from Toyota’s original supplier (Panasonic) are built to the original electrical balance specifications, meaning all 28 modules perform uniformly. This is why OEM packs consistently outlast aftermarket alternatives and integrate seamlessly with the Prius Synergy Drive system. At Ace Hybrid Tech, every battery is tested for voltage balance, capacity, and performance before installation. We never cut corners on cell quality. → Learn more: Unlocking the Secrets of Remanufactured Hybrid Batteries Our Replacement Process — What to Expect Free Diagnostic Test — We confirm battery failure with professional scanning equipment (OBD2 proprietary hybrid diagnostic tools). Safe High-Voltage Removal — Our technicians follow strict Toyota-specified safety procedures for working with 201.6V hybrid systems. Battery Installation & Module Balancing — The new OEM pack is installed and verified for module balance. Synergy Drive Calibration — We clear all fault codes and calibrate the hybrid system. Road Test & Final Check — Your Prius is driven and confirmed to be delivering proper MPG and performance before return. Typical turnaround: same day or next day. How Long Will Your New Battery Last? With proper care, a quality replacement Prius battery can last 8–12 years or 100,000–150,000 miles. To maximize your investment: Clean the battery cooling fan every 30,000 miles (clogged fans overheat cells) Drive regularly — batteries sitting unused for weeks experience accelerated self-discharge Park in shade — extreme heat (especially in California summers) accelerates NiMH degradation Avoid aggressive driving patterns — regenerative braking works best with smooth deceleration Schedule annual hybrid system checkups — early detection prevents costly repairs → Read: Why Some Hybrid Batteries Fail Early (And How to Avoid It) → Read: How Long Will a Hybrid Battery Really Last? 2024–25 Data Core Exchange Policy A refundable $500 core deposit is required for orders without in-shop installation. Once your old battery is returned to us, the deposit is fully refunded. For in-shop service, no deposit is required — we handle the core exchange during your appointment. Shipping: Not available for this product. Local pickup and in-shop installation only. Located at: 7552 Acacia Avenue, Garden Grove, CA 92841. Frequently Asked Questions How much does a 2004–2009 Toyota Prius hybrid battery replacement cost? At Ace Hybrid Tech, pricing starts at $950 and goes up to $2,600 depending on the warranty plan you select (1-year through 5-year / 75,000-mile). All plans include parts and labor. Is it worth replacing the hybrid battery on a high-mileage Gen 2 Prius? Yes — especially if the car is mechanically sound. A Gen 2 Prius with a fresh battery can realistically run another 100,000 miles. The replacement cost is far less than a new or newer used vehicle. What does the “red triangle” warning mean on my Prius? The red triangle is the master warning indicator for a fault in the hybrid system — most commonly a hybrid battery issue. A P0A80 or similar code from an OBD2 scanner confirms battery module failure. → See our full warning light guide Can I drive my Prius with a failing hybrid battery? Technically yes, but not recommended. A degraded battery forces the engine to run constantly, resulting in 25–35 MPG instead of 45–52 MPG, and can stress the inverter and other hybrid components over time. How long does the installation take? Most Gen 2 Prius battery replacements are completed within 1–2 hours at our shop. Do you offer mobile service for the Gen 2 Prius battery? Mobile service may be possible. Please call (714) 728-9393 to confirm availability in your area. What is the OEM part number for the 2004–2009 Prius battery? The primary OEM part numbers are G9280-47110, G9280-47100, and G9510-47030. These cross-reference to the same Panasonic-manufactured NiMH pack used in original production. Why is Ace Hybrid Tech better than the Toyota dealership? Dealerships typically charge $3,000–$4,500 for this replacement with a 1-year warranty. We offer the same OEM-quality battery starting at $950 with warranty options up to 5 years / 75,000 miles — and our technicians specialize exclusively in hybrid systems, not general automotive service.     Core Exchange: Core Exchange is required for these prices. If this is a battery exchange, with no installation on our part, or a shipping order, the customer will need to pay a Refundable Core Deposit of $500.00, which will be gladly Refunded when we receive the old hybrid battery back. Shipping Is Not Available for This Product. Local Pick-up and Installation Only. Call us (714) 728-9393 for availability & our specials. 4.5/5 (2 Reviews) FAQ 1. How much does it cost to replace a 2004–2009 Toyota Prius hybrid battery? At Ace Hybrid Tech, the cost ranges from $950 to $2,600, depending on the warranty option you choose. We provide flexible coverage from 1 year / 12,500 miles up to 5 years / 75,000 miles, so you can select what fits your budget and driving habits. 2. Is it better to repair or replace a Prius hybrid battery? In some cases, repairing a few failing modules can restore your battery temporarily. However, for most 2004–2009 Prius models, full replacement is the smarter investment. A replacement battery provides better long-term performance, improved fuel economy, and peace of mind with a warranty. 3. How long will a replacement Prius hybrid battery last? A new or re-manufactured Toyota Prius hybrid battery can last 8–10 years or 100,000–150,000 miles, depending on climate, driving style, and maintenance. Choosing a warranty-backed replacement from Ace Hybrid Tech ensures your battery is protected for years. 4. Can I drive my Prius with a failing hybrid battery? Yes, but it’s not recommended. A failing hybrid battery often causes the gasoline engine to run more frequently, leading to lower MPG, reduced performance, and potential damage to other hybrid components. Replacing the battery early saves money and avoids bigger repairs. 5. Why should I choose Ace Hybrid Tech instead of the dealership? Dealerships often charge $3,000–$4,500 for Prius hybrid battery replacement. At Ace Hybrid Tech, we offer the same professional service and quality at a fraction of the cost — with flexible warranty options up to 5 years / 75,000 miles. Plus, our certified technicians specialize only in hybrids and EVs, making us the trusted choice for California Prius owners.