How Much It Costs to Replace a Battery in a 2018 Honda Accord

Expect to pay about $150–$350 total in most U.S. markets (2025) to replace the standard 12‑volt battery in a 2018 Honda Accord, depending on battery type and where you get the work done. Do‑it‑yourself costs are typically $120–$250 for the battery alone, while dealership installs often land between $260–$420. If you own an Accord Hybrid, note that the high‑voltage traction battery is a different component entirely and can cost $2,500–$5,000+; the hybrid’s small 12‑volt battery replacement is usually $180–$350 installed.

What Drives the Price

Several variables determine where your final bill will land. Understanding these factors helps you choose the right battery and avoid overpaying.

• Battery type and capacity: Conventional flooded lead‑acid is cheapest; EFB (enhanced flooded) and AGM (absorbed glass mat) cost more but are often required for trims with auto stop‑start or higher electrical loads.
• Fitment/spec: The 2018 Accord commonly uses Group 51R or H5 (Group 47) sizes, depending on engine/trim; verify before purchase.
• Where you buy/install: National parts retailers often include basic installation; dealers charge more but use Honda‑branded/OEM units; mobile services add convenience fees.
• Labor rates and time: Installation is typically 0.3–0.6 hours; shop rates vary by region ($100–$180/hr).
• Battery management reset: Some trims may need a battery sensor/BMS reset after installation; some shops include this, others charge $0–$50.
• Fees and credits: Core charge ($15–$30, refundable when you return the old battery), recycling/disposal, shop supplies, and sales tax.
• Warranty coverage: Longer free‑replacement warranties (2–3 years common) can raise the upfront price but reduce long‑term cost.

Taken together, these inputs explain why quotes for the “same” battery job can vary noticeably across shops and regions.

Typical 2025 Price Ranges

Below are ballpark figures you’re likely to see this year for a 2018 Accord’s 12‑volt battery, by scenario and battery type.

• DIY parts-only:
  

  • Flooded lead‑acid: $120–$180
  • EFB: $170–$230
  • AGM: $200–$300

• Installed at national parts store or mobile installer: $180–$280 (flooded/EFB), $220–$350 (AGM), often including install and recycling
• Independent shop: $200–$320 installed, depending on battery spec and local labor rates
• Honda dealership: $260–$420 installed for OEM‑branded flooded/EFB/AGM, including BMS reset where applicable
• Accord Hybrid (12‑volt auxiliary battery): generally $210–$350 installed
• Accord Hybrid high‑voltage traction battery (not the same as the 12‑volt): $2,500–$5,000+ parts and labor, depending on new vs. remanufactured and warranty

Regional price swings are normal: coastal metros and cold‑weather markets tend to run higher, while promotions and seasonal rebates can knock $20–$60 off.

Battery Type Guidance for a 2018 Accord

Not every 2018 Accord uses the same 12‑volt battery. Trims with auto stop‑start or higher electrical loads may require EFB or AGM to maintain durability and warranty compliance. Physical size also varies by fitment.

Use the following quick checks to confirm the correct battery before you buy:

• Owner’s manual and under‑hood label: The most reliable source for group size and type (e.g., 51R vs. H5/Group 47; Flooded vs. EFB/AGM).
• VIN lookup: Dealers and major retailers can decode your VIN for exact fitment.
• Retailer fitment guides: Cross‑check two sources (e.g., Interstate, DieHard, Exide, Honda parts) to avoid misfits.
• Existing battery sticker: Match group size, CCA rating, and technology if your trim originally shipped with EFB/AGM.

Using the correct spec matters for cold cranking performance, stop‑start functionality, and the car’s battery management system.

What Professional Installation Usually Includes

A good shop does more than swap the battery. The following services are commonly bundled or available on request.

• Battery system test: Confirms the old battery is the issue and checks alternator/charging health.
• Memory saver hookup: Maintains radio presets and ECU adaptations during replacement.
• BMS/battery sensor reset or relearn: Ensures accurate state‑of‑charge readings and proper stop‑start behavior.
• Terminal cleaning and anti‑corrosion treatment: Helps new battery last longer.
• Old battery recycling and core credit processing: Keeps hazardous materials out of landfills and lowers your net price.
• Warranty registration: Documents purchase date and coverage terms (usually 2–3 years free replacement).

Ask for an itemized estimate so you know what’s included and whether any add‑on fees apply.

How Long Replacement Takes

Most shops complete the job in 15–45 minutes. Allow extra time if the battery is hard to access, terminals are corroded, or the shop performs diagnostics and a BMS reset.

Ways to Save Without Cutting Corners

You can trim the bill while keeping quality and warranty intact by using these tactics.

1. Compare 2–3 quotes across a dealer, independent shop, and a national parts retailer that offers free installation.
2. Use coupons and seasonal promos (winter and summer sales are common); ask about price matching.
3. Return the old battery to recover the core charge ($15–$30).
4. Buy the correct spec—don’t overbuy cold‑cranking amps or the wrong technology; EFB/AGM only if required or recommended.
5. DIY if comfortable; the Accord’s battery is accessible, and many retailers provide install guides. Have a memory saver if you care about presets.
6. Check your roadside assistance or membership club; many offer discounted batteries with on‑site installation.
7. Test the charging system first; a weak alternator can mimic a bad battery and kill a new one quickly.

Smart shopping and proper fitment usually matter more than choosing the absolute lowest price.

When to Replace

Most 12‑volt car batteries last 3–5 years, shorter in extreme heat or cold. Watch for these signs in your 2018 Accord.

• Slow cranking or repeated jump‑starts
• Stop‑start system disabled or “Battery”/charging warning lights
• Dim lights or electrical gremlins at idle
• Resting voltage below ~12.3V or failed load test
• Age: 4+ years old or original battery still in the car

If any of these show up, testing and timely replacement can prevent a no‑start situation.

Summary

For a 2018 Honda Accord, a straightforward 12‑volt battery replacement typically runs $150–$350 all‑in, with dealerships toward the higher end and DIY or parts-store installs on the lower end. Confirm the correct group size and technology (flooded vs. EFB/AGM), factor in core credits and any BMS reset, and compare a couple of quotes. Hybrid owners should note the huge cost difference between the small 12‑volt battery ($180–$350 installed) and the high‑voltage traction battery ($2,500–$5,000+), which is a separate component.

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

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

What car battery costs $400?

Average Cost of a Car Battery
On average, a flooded lead-acid battery will cost between $185 and $300, while an AGM battery can cost between $250 and $400.

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.