How Much a New Battery Costs for a 2018 Honda Accord

For most 2018 Honda Accord gas models, a new 12‑volt replacement battery (Group 51R) typically costs $160–$330 for the part and about $220–$500 installed, depending on brand, battery type (flooded, EFB, or AGM), and where you buy it. If you have a 2018 Accord Hybrid and mean the high‑voltage traction battery, installed replacement usually runs $2,500–$5,500, though warranty coverage may apply depending on age, mileage, and state.

What the 2018 Accord Uses

The 2018 Accord lineup includes 1.5T and 2.0T gas models and a Hybrid. Most gas trims use a 12‑volt BCI Group 51R battery (positive terminal on the right). Trims equipped with Auto Idle Stop or heavier electrical loads may specify an EFB or AGM variant for durability. The Hybrid has a standard 12‑volt auxiliary battery plus a separate high‑voltage traction battery; the latter is far more expensive and is serviced differently.

Typical Price Ranges (U.S., 2025)

The following ranges reflect current U.S. retail pricing and common installed totals for the 2018 Accord’s batteries, with differences driven by chemistry, brand, and installation venue.

• Standard flooded 12‑volt Group 51R: $150–$230 (part only)
• Enhanced Flooded Battery (EFB) 51R: $180–$260 (part only)
• Absorbent Glass Mat (AGM) 51R/D51R: $220–$330 (part only)
• Dealer-installed 12‑volt battery: $300–$500 total (parts + labor + shop fees)
• Independent shop installed 12‑volt battery: $220–$380 total
• DIY replacement: parts cost above, plus $10–$25 disposal fee and a refundable $10–$25 core charge
• 2018 Accord Hybrid high‑voltage traction battery: $2,000–$4,500 for the pack; $2,500–$5,500 installed

Prices vary by region, season, and brand warranty. Premium brands and longer free‑replacement warranties sit at the higher end; warehouse clubs and promotions can lower totals.

How to Tell Which Battery You Need

Before buying, confirm the correct battery type for your specific Accord trim and equipment. The steps below can help you avoid mismatches and repeat work.

• Check your owner’s manual or the label on the existing battery for “BCI Group 51R.”
• Confirm whether your car has Auto Idle Stop; if so, Honda often recommends EFB or AGM for durability.
• Look up your VIN at a dealer or reputable parts retailer to match the correct spec.
• If buying an Optima or specialty battery, note that “D51R” is the compatible form factor for 51R applications.
• Hybrid owners: distinguish between the standard 12‑volt auxiliary battery (inexpensive) and the high‑voltage traction battery (expensive, dealer-handled).

These checks help ensure the battery meets the vehicle’s electrical demands and mounting/terminal orientation, preventing fitment or performance issues.

Expected Lifespan and Warranty

In typical U.S. conditions, a 12‑volt battery lasts 3–5 years; extreme heat, cold, short trips, and high accessory loads shorten life. Most aftermarket 51R batteries carry 2–3 years of free replacement warranty, sometimes followed by prorated coverage. The 2018 Accord Hybrid’s high‑voltage battery was originally covered by an 8‑year/100,000‑mile federal emissions warranty (10‑year/150,000‑mile in many CARB states). Depending on in‑service date, some hybrids may still have coverage; verify with a Honda dealer using your VIN and mileage.

Labor and Additional Costs

Installation costs are modest but can include extra steps and fees. Here’s what typically influences the out‑the‑door price.

• Labor time: roughly 0.3–0.6 hour, depending on access and corrosion
• Battery Management System (BMS) reset or memory procedures (some shops include this)
• Anti‑corrosion service for terminals and hold‑downs
• Environmental disposal/recycling fee ($10–$25)
• Refundable core charge ($10–$25) returned when you bring back the old battery

Not all Hondas require an electronic registration, but a BMS reset or idle relearn may be recommended to ensure proper charging behavior and stable idle.

Where to Buy

You have multiple options for sourcing a replacement battery, each with tradeoffs in price, convenience, and warranty support.

• Honda dealership: OEM-spec battery, seamless fit, higher price, warranty handled on-site
• Auto parts retailers (e.g., Advance, AutoZone, O’Reilly): broad selection, installation often available
• Warehouse clubs (e.g., Costco): competitive pricing, limited on-site services, strong warranties
• Big-box stores (e.g., Walmart): low prices, installation varies by location
• Online (e.g., RockAuto, manufacturer sites): good pricing; DIY install or bring to a shop

If you value convenience and on-the-spot testing/installation, local retailers and dealers are easiest. For lowest part prices, warehouse clubs and online vendors often win.

Bottom-Line Price Examples

These scenarios illustrate what many owners actually pay for a 2018 Accord battery replacement in 2025.

• Gas LX/EX (standard flooded 51R) at an independent shop: about $240–$320 installed
• Gas Touring with Auto Idle Stop (AGM 51R) at a retailer or shop: about $320–$420 installed
• DIY from a warehouse club (51R flooded/EFB): roughly $160–$240 plus tax, with core refunded
• 2018 Accord Hybrid traction battery at a dealer, out of warranty: commonly $3,000–$4,500 total, but can range $2,500–$5,500

Your final price will hinge on battery chemistry, brand, local labor rates, and whether promotions or warranties apply.

Summary

For a 2018 Honda Accord gas model, expect $160–$330 for a new 12‑volt Group 51R battery and about $220–$500 installed; trims with Auto Idle Stop often benefit from EFB or AGM at the higher end of that range. The 2018 Accord Hybrid’s high‑voltage battery is a different component entirely and typically costs $2,500–$5,500 installed, with potential warranty coverage depending on location and mileage. Confirm your trim’s requirements, factor in disposal/core charges, and consider a BMS reset for best results.

How much does it cost to replace a Honda Accord battery?

Honda Accord Battery Replacement Costs: Around $75 to $200. Honda Accord Hybrid Battery Replacement Costs: Around $2,000 to $8,000.

How much is a battery for a 2018 Honda Accord?

How much to replace the battery in my Honda? Depending on power, size, and quality, prices for a replacement car battery range from about $45 to $250.

How long do 2018 Honda Accord batteries last?

between 3 to 5 years
Your 2018 Honda Accord battery will regularly last between 3 to 5 years, but that can vary heavily depending on type of battery, battery size, weather conditions and driving habits.

How much does a battery cost at the Honda dealership?

Typically a new battery for your Honda vehicle will cost between $75 and $200 dollars.