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Fitment & group size

Honda Accord Battery Size & Group Size by Year

Per Honda's parts catalog, 2003–2017 four-cylinder Accords take a Group 51R (some 2008–2012 cars list a 70D23L instead). 2008–2017 V6s take a Group 24F, and 2003–2007 V6s a 70D23L. The 1.5T takes an LN2/H5 (EFB from 2021), the 2018–2022 2.0T an H6, and every Accord Hybrid since 2014 a Group 51 — not 51R. The label on your current battery is the final check.

Close-up of a generic car battery label and terminal layout for checking group size
Group size controls the battery case, hold-down, and terminal positions; confirm it before buying.

Battery finder

Year
2008-2012
Engine
4-cyl 2.4L
Year + engine reference
8th gen
Group
51R
CCA
Not listed
Type
Not listed

Select your Accord year and engine. Each size is the replacement battery Honda's parts catalog lists for it (part numbers in the chart below); confirm against the label on your battery before buying.

Honda lists two batteries for some 2008-2012 four-cylinder trims: this 51R and a 70D23L-MF. The label on your current battery tells you which one your car has.

Shop Group 51R ▸
See recommended batteries
This chart lists the replacement battery Honda's own parts catalog gives for each year and engine. Honda's owner's manuals don't print the battery group or CCA, and Honda's current replacement part can differ from what the factory fitted — so the label on the battery in your car is the final check. The wrong group size won't fit the tray or hold-down, and the terminals may end up on the wrong side.

This is the size reference within the complete Honda Accord battery guide — the exact BCI group size your car needs, by year and engine.

Most common, in plain terms: a 2003–2017 four-cylinder Accord takes a 51R in Honda’s parts catalog. A 2008–2017 V6 takes a 24F; a 2003–2007 V6 takes a Japanese-size 70D23L. From 2018 the gas cars move to European case sizes (LN2/H5 on the 1.5T, H6 on the 2.0T), and the hybrid uses a Group 51 — not 51R. Every row in the chart below shows the Honda part number it comes from.

How to confirm your exact battery size (3 ways, most reliable first)

  1. Read the old battery. The group size is printed on the top or side label (e.g. “51R”, “24F”, “H5”). This is the single most reliable source — it’s what’s physically in your car right now.
  2. Honda’s parts catalog. The chart below gives the replacement battery Honda lists for your year and engine, with the part number. (Honda’s owner’s manuals don’t print the battery group or CCA; they only say the replacement must have the same specifications.)
  3. Retailer fitment lookup. AutoZone, Advance Auto, or Walmart let you enter your year + engine (or VIN) and return the exact fit. Use this to double-check before you buy.

What “group size” actually means

Group size is a Battery Council International (BCI) standard. It defines the battery’s length, width, height, terminal positions, and hold-down style — not its power. Two batteries with the same group size (e.g. 51R) will physically fit the same tray and connect the same way. The trailing “R” means reversed terminals (positive/negative swapped vs the non-R version) — a 51 and a 51R are not interchangeable.

Pick the right power (CCA) and type

  • CCA (cold cranking amps): match or exceed the rating on your current battery. Honda’s part name only states it for the V6 24F (630 CCA), so for other rows the label on the old battery is your number.
  • Battery type: Honda’s part names state the type only for the newer cars: an EFB (enhanced flooded) H5 on the 2021–2025 1.5T, and a flooded H6 on the 2018–2022 2.0T. For the other rows Honda doesn’t say. Match the type printed on your current battery; if it says AGM, replace it with AGM.
  • Lifespan: a typical Accord battery lasts 3–5 years. Heat shortens it more than cold.

OEM vs aftermarket — what to buy

You do not have to buy the Honda dealer battery. As long as the group size matches and the CCA is equal or higher, a quality aftermarket battery fits and performs the same:

  • Budget / wide availability: EverStart (Walmart), Duracell.
  • Mid / strong warranty: ACDelco, Bosch, DieHard.
  • Premium / AGM: Optima, Odyssey, DieHard Platinum AGM.

For specific recommendations by year and engine, see the best battery picks for a Honda Accord.

Expect roughly $120–$250 for the battery itself (size and type dependent), or $230–$251 installed at a shop (RepairPal average). Swapping it yourself on most Accords is a 15-minute job with a 10mm wrench — see the battery replacement how-to.

Here’s the full group-size chart by generation — find your year, then shop that size:

Honda Accord battery by year and engine (Honda genuine-parts catalog)
Years Engine Group CCA Type Honda part no. Shop
2003-2007 4-cyl 2.4L 51R Not listed Not listed 31500-SR1-100M
“Battery (51R/500Amp85)” 		Shop ▸
2003-2007 V6 3.0L 70D23L-MF Not listed Not listed 31500-SL5-100M
“Battery Assembly (70D23L-MF)” 		Shop ▸
2008-2012 4-cyl 2.4L 51R Not listed Not listed 31500-SR1-100M
“Battery (51R/500Amp85)” 		Shop ▸
2008-2012 4-cyl 2.4L (70D23L option) 70D23L-MF Not listed Not listed 31500-SL5-100M
“Battery Assembly (70D23L-MF)” 		Shop ▸
2008-2012 V6 3.5L 24F 630 Not listed 31500-TK8-A2100M
“Battery (Gr24F/630Cca)” 		Shop ▸
2013-2017 4-cyl 2.4L 51R Not listed Not listed 31500-SR1-100M
“Battery (51R/500Amp85)” 		Shop ▸
2013-2017 V6 3.5L 24F 630 Not listed 31500-TK8-A2100M
“Battery (Gr24F/630Cca)” 		Shop ▸
2014-2015, 2017 Hybrid 2.0L (12V battery) 51 Not listed Not listed 31500-SB2-100M
“Battery Assembly (51/500Amp85)” 		Shop ▸
2018-2020 1.5T LN2 Not listed Not listed 31500-TGG-100M
“Battery (Ln2)” 		Shop ▸
2021-2022 1.5T H5 Not listed EFB 31500-TLA-EFB100M
“BATTERY (H5EFB)” 		Shop ▸
2018-2022 2.0T H6 Not listed Flooded 31500-TZ3-100M
“Battery (H6/Fla)” 		Shop ▸
2018-2022 Hybrid 2.0L (12V battery) 51 Not listed Not listed 31500-SB2-100M
“Battery Assembly (51/500Amp85)” 		Shop ▸
2023-2025 1.5T H5 Not listed EFB 31500-TLA-EFB100M
“BATTERY (H5EFB)” 		Shop ▸
2023-2025 Hybrid 2.0L (12V battery) 51 Not listed Not listed 31500-SB2-100M
“Battery Assembly (51/500Amp85)” 		Shop ▸

Source: Honda's genuine-parts catalog — the replacement battery Honda lists for each year and engine, with Honda's own part name. Honda's owner's manuals do not print the battery group or CCA. "Not listed" means Honda's part name does not state it, so we don't either. Honda's current replacement part can differ from the battery fitted at the factory, so the label on the battery in your car is the final check.

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Frequently asked questions

What size battery does a Honda Accord take?
Honda's parts catalog lists a Group 51R for 2003–2017 four-cylinder Accords (with a 70D23L also listed for some 2008–2012 cars), a 24F for 2008–2017 V6s, a 70D23L for 2003–2007 V6s, an LN2/H5 for the 1.5T, an H6 for the 2018–2022 2.0T, and a Group 51 for the hybrid. Confirm on your current battery's label before buying.
Is my Accord battery a 51R or a 24F?
It depends on the engine. Honda lists 51R for 2003–2017 four-cylinder Accords and 24F for 2008–2017 V6s. The 2003–2007 V6 is neither: Honda lists a 70D23L for it. The quickest way to be sure is the group size printed on the label of the battery in your car.
Can I put a bigger battery in my Honda Accord?
Only if the group size still fits the tray and hold-down and the terminals are in the same position. You can safely choose a battery with higher CCA in the correct group size, but a physically larger group that doesn't secure properly is unsafe. Stick to your factory group size.
How much is a Honda Accord battery?
Expect about $120–$250 for the battery itself depending on group size and whether it's AGM, or roughly $230–$251 installed at a shop (RepairPal average). Replacing it yourself takes about 15 minutes with a 10mm wrench on most Accords.
How long does a Honda Accord battery last?
Typically 3–5 years. Heat shortens battery life more than cold, so Accords in hot climates often need replacement sooner. If yours is slow to crank, is over 4 years old, or the battery/charging light is on, test it before it leaves you stranded.
Does a hybrid Accord use the same battery?
No. Honda's parts catalog lists a Group 51 (not 51R) 12V battery for the 2014–2025 Accord Hybrid, separate from the high-voltage drive battery. The 2005–2007 Accord Hybrid uses the same 70D23L as that era's V6. Read the label on the hybrid's 12V battery before ordering.

Sources