Most Honda key fobs use small round coin batteries. If your Honda key fob is dead or you see a “Keyless Remote Battery Low” warning, you almost always need one of these sizes:
Standard Honda Key Fob Battery Type: CR2032For most newer Honda models (Accord, Civic, CR‑V, Pilot, Odyssey, HR‑V, Passport, Ridgeline), the standard battery is a:
CR2032 lithium coin batteryYou’ll see this listed as:
“CR2032 Honda key fob battery” “Honda key fob battery size CR2032”When people search “how to replace battery in Honda key fob” or “Honda key fob replacement battery,” they’re usually looking for this CR2032 coin cell.
Other Common Honda Key Fob BatteriesSome older or smaller Honda key fobs use different coin cells. The most common alternatives are:
CR1616 CR1620 CR2025These show up a lot on older Civic, Accord, CR‑V, Fit, and early Pilot/Odyssey remotes. The process to replace Honda key fob battery is similar, but the battery thickness and diameter are different, so you must match the exact type.
How to Confirm Your Exact Honda Key Fob Battery Size
Before you buy, confirm the correct replacement battery for Honda key fob in one of these simple ways:
Check the owner’s manual Look under “Keyless Entry,” “Key Fob,” or “Remote Transmitter.” It will list the exact battery type: CR2032, CR1616, CR1620, or CR2025. Open the fob and read the old battery The code (for example, CR2032) is printed right on the metal battery. Match that code exactly when you buy a replacement battery for Honda key fob. Call a Honda service department or parts counter Give them your year, model, and trim (for example, 2018 Honda CR‑V, 2015 Honda Civic, 2026 Honda Accord). Ask: “What battery does my Honda key fob use?”Confirming the exact size keeps you from forcing in the wrong battery or ending up with a Honda key fob not working after battery replacement.
Best Battery Brands for Honda Key FobsFor Honda smart keys and push‑button start systems, battery quality really matters. Weak or cheap cells can cause range issues or intermittent failures. I strongly recommend name‑brand CR2032 batteries that are known to be Honda‑compatible, like:
Panasonic Energizer Duracell Sony MaxellWhen I source Honda key fob replacement battery kits for customers, I only use fresh, high‑quality lithium coin cells. They last longer and handle temperature swings better than no‑name options.
Avoid:
Ultra‑cheap, no‑name coin cells Bulk “unbranded” packs with no clear manufacture date Anything that looks repackaged or not sealedLow‑quality batteries are one of the biggest reasons people see “Honda key fob not recognized after battery change” or random remote start failures.
Where to Buy Honda Key Fob Batteries (Online & Local)You don’t need a dealer-only part. Honda key fob battery replacement is easy and inexpensive if you know what to look for.
Local options:
Big box stores (Walmart, Target) Auto parts stores (AutoZone, O’Reilly, Advance Auto Parts, NAPA) Drugstores (CVS, Walgreens, Rite Aid) Some hardware stores and grocery chainsJust ask for a CR2032, CR1616, CR1620, or CR2025 lithium coin battery that’s compatible with Honda key fob.
Online options:
Amazon (look for high-rated, name‑brand coin cells) Walmart.com, Target.com, major auto parts websites Our own key fob battery kits, which I build specifically as: Key fob replacement battery for Honda Civic, Accord, CR‑V, Pilot Key fob battery replacement compatible with Honda Pilot / Odyssey / Passport / HR‑VWhen you order online, check:
The exact battery code Brand name Expiration date or “best by” date Reviews mentioning Honda key fob battery replacementOnce you he the correct Honda key fob replacement battery, you’re ready to open the fob and swap it in without a trip to the dealer or a high Honda key fob battery replacement cost.
Tools You Need to Replace a Honda Key Fob BatteryYou don’t need a full toolbox to replace a Honda key fob battery, but using the right tools keeps you from cracking the case or damaging the circuit board.
Use the Built‑In Emergency KeyEvery modern Honda key fob (Accord, Civic, CR‑V, Pilot, Odyssey, HR‑V, etc.) has a built‑in emergency key you can use to open the fob:
Slide the small release switch on the back or side of the fob. Pull the metal key out completely. Use the tip of that key in the case notch to gently twist and start separating the two halves of the fob.This is the safest way to start opening the fob without putting metal tools directly against the plastic.
Optional Tools That Make It EasierYou can replace the Honda key fob battery with basic items most people already he:
Small flathead screwdriver (jeweler’s or eyeglass size) Coin (nickel or quarter) to twist in the case notch Plastic pry tool or guitar pick to work around the edge without scratching Safety Tips to Protect Your Honda Key FobTo oid scratching or cracking your Honda key fob while you replace the battery:
Don’t force it – if the case isn’t opening, recheck for the notch and twist gently. Use plastic first – start with a plastic pry tool before switching to a screwdriver. Stay shallow – don’t shove tools deep inside; you can hit Step‑by‑Step Honda Key Fob Battery ReplacementReplacing a Honda key fob battery is something you can handle in a few minutes at home. Here’s exactly how I’d do it.
1. Remove the Emergency KeyMost newer Honda key fobs (Accord, Civic, CR‑V, Pilot, Odyssey, etc.) he a built‑in metal key:
Flip the fob so the Honda logo is facing you. Look for a small release switch or slide button on the back or side. Hold the switch and pull the metal key out of the fob body. 2. Open the Honda Key Fob Case SafelyUse the emergency key or a small flat tool to pop the case:
With the key removed, you’ll see a small slot where the key came out or along the fob seam. Insert the emergency key, small flathead screwdriver, or plastic pry tool into the slot. Gently twist to separate the two halves. Work your way around the edge until the case opens. Don’t use too much force—this is how people crack Honda key fob housings. 3. Remove the Old Honda Key Fob BatteryOnce open, you’ll see the round coin cell battery:
Note the battery size and markings (usually CR2032, but some use CR1616, CR1620, or CR2025). Use a fingernail or plastic tool to carefully pry the battery out of its holder. Avoid scratching the metal contacts or bending the board. 4. Insert the New CR2032 Battery (Correct Polarity)Most modern Honda smart keys and remote start fobs use a CR2032 Honda key fob battery:
Make sure the new battery is fresh, name‑brand, and the same type (CR2032 or whatever was in yours). Line up the battery so the “+” (positive) side faces the same way as the old one—usually up. Gently press it into place until it sits flat and secure.If you he a 2018–2022 Accord, you can use a high‑quality replacement like our 2018–2022 Honda Accord key fob that’s designed to work perfectly with the correct CR2032 battery.
5. Snap the Honda Key Fob Back TogetherOnce the new battery is in:
Align the two halves of the case so all edges line up. Press around the perimeter until you hear and feel the clips snap back together. Slide the emergency key back into its slot until it clicks. 6. Test the Honda Key Fob After Battery ReplacementBefore you walk away, test everything:
Stand near your Honda and press Lock, Unlock, and (if ailable) Trunk and Remote Start. Watch for door locks cycling, lights flashing, or beep sounds. For push‑button start models, sit in the car, step on the brake, and press Start to confirm the car recognizes the fob.If the Honda key fob is still not working after battery replacement, open it back up and double‑check:
Battery is the correct size. Polarity (“+” and “–”) is correct. Case is fully snapped together and buttons aren’t stuck. 7. Small Differences Between Popular Honda Key Fob DesignsHonda has a few main fob styles, but the process to replace a Honda key fob battery is almost the same:
Newer smart keys (push‑to‑start) – Slim, with a slide‑out key and a visible seam. These usually use CR2032 and open easily from the key slot. Older 3‑/4‑button remotes – Slightly thicker, sometimes with visible screws. Some use CR1616/CR2025, and you may need a tiny Phillips screwdriver. Flip keys (older Civics/Fits/Accords) – The metal key folds out; the battery sits behind the plastic remote section, which may be held with one or two screws.No matter which Honda model you drive, if you match the correct battery size and open the case carefully, you can replace the key fob battery fast without damaging your remote.
Honda Accord Key Fob Battery Tips Battery type and years for Honda Accord key fobsFor most modern Accords, the replacement battery for a Honda key fob is a CR2032 coin cell. Here’s a quick guide:
2013–2025 Honda Accord key fob battery replacement: Usually CR2032 2008–2012 Accord key fob battery replacement: Often CR1616 or CR2032 2003–2007 Accord key fob battery replacement: Commonly CR1616Because Honda used a few different remotes over the years, I always tell people to:
Check the owner’s manual Pop the fob open and read the size printed on the old battery Call a Honda dealer with your VIN if you’re unsure How Accord key fob cases usually openMost Honda Accord key fobs open in one of two ways:
Smart key / push-button start (2013+): Slide the release switch on the back Pull out the emergency key Use the key tip in the small notch to gently twist and split the case Older integrated key fobs (early 2000s): Remove the small Phillips screw if there is one Use a small flathead screwdriver or coin in the side groove Twist gently until the shell separatesIf you ever end up needing a full remote instead of just a battery, we also offer complete remotes like our OEM‑style Honda Odyssey key fob for similar Honda designs.
Common mistakes when changing an Accord key fob batteryWhen people replace a Honda Accord key fob battery, these are the issues I see the most:
Installing the battery upside down – the “+” side should match the marking inside the case Bending the metal contacts – this can cause weak or no connection Using a screwdriver too aggressively – cracks the case or damages the circuit board Touching the battery face too much – skin oils can reduce contact; wipe with a clean cloth Using cheap, no‑name coin cells – they die fast and cause random key fob issuesStick with a quality CR2032, open the case slowly, and double-check battery orientation—that’s usually all it takes to get your Accord remote working like new.
Honda Civic Key Fob Battery TipsFor most modern Honda Civic key fobs, the battery type is a CR2032 lithium coin cell. Some older Civic remotes (roughly 2006–2013) use CR1616 or CR1620. The safest way to confirm your Honda Civic key fob battery type is to:
Check the owner’s manual under “keyless entry” or “smart key” Open the fob and read the number printed on the old battery Call your local Honda dealer with your year and trimStick with name‑brand batteries (Energizer, Panasonic, Duracell) for your Honda Civic key fob battery replacement so the range and lifespan stay consistent.
When you open the Civic key fob, pay attention to the rubber buttons and seals:
Don’t yank the case apart; gently pry around the seam with a small flathead or plastic pry tool Keep the rubber button pad and rubber waterproof seal in place if possible If they pop out, set them back flat in the case before you reinstall the new battery Avoid touching the battery contacts with greasy or wet hands – oils can cause poor contactIf your Honda Civic key fob still doesn’t work after a battery change, run through this quick checklist:
Make sure the new battery is installed positive (+) side up as marked in the case Confirm the battery is fully seated and not tilted or loose Inspect the metal battery contacts for dirt or corrosion; gently clean with a dry cotton swab Try your backup Civic key fob to rule out an issue with the car’s receiver If neither fob works, or the remote works only right next to the car, you may need dealer diagnosis or key fob reprogrammingMost Civic owners in the U.S. can handle this DIY Honda Civic key fob battery replacement in a few minutes, and it ses you from paying dealer labor just for a simple coin cell swap.
Honda CR‑V Key Fob Battery Tips Battery type and years for Honda CR‑V key fobsFor most modern Honda CR‑V key fobs, the standard battery is a CR2032 coin cell. Some older CR‑V remotes (roughly 2007–2013) may use CR1616, CR1620, or CR2025.To be sure before you buy a replacement battery for a Honda key fob, always:
Check the numbers stamped on the old battery Look in your CR‑V owner’s manual under “Key Fob Battery” Call the dealer with your VIN if the fob has been changed beforeStick with name brands (Energizer, Panasonic, Duracell) for the best Honda CR‑V key fob battery life and range.
Honda CR‑V low battery warning signsYour CR‑V will basically “tell” you when the Honda keyless entry battery is getting weak. Watch for:
Shorter range – you he to stand closer to lock/unlock Slow response – buttons work, but there’s a delay Intermittent operation – works some presses, then not at all Dashboard/cluster message – “Keyless Remote Battery Low” on newer CR‑V models Push‑to‑start issues – you need to hold the fob right up to the start buttonOnce you see any of this, plan a quick Honda CR‑V key fob battery replacement before it dies completely.
CR‑V key fob not working after battery change (Troubleshooting)If your Honda CR‑V key fob is not working after battery replacement, run through these checks:
Flip the battery – Make sure the + side faces the same way as the original (usually up). Reseat the battery – The coin cell must sit flat and fully under the metal contacts. Check the case – Make sure the shell is snapped together tight; a gap can keep the buttons from pressing the board. Inspect the contacts – Lightly clean any corrosion with a dry cloth or cotton swab; no liquids. Try the backup fob – If the spare works fine, the main fob may he a damaged circuit board. Test at the car – Stand next to the driver’s door; sometimes range is reduced after a weak battery period.If the CR‑V still won’t respond, your fob may need reprogramming or full replacement. In that case, work with a Honda dealer or a pro key shop that sells key fob replacement compatible with Honda CR‑V, Civic, Accord, and Pilot similar to how we source OEM‑style remotes like this Honda‑compatible smart key replacement.
Honda Pilot and Odyssey Key Fob Battery Tips Battery type for Honda Pilot and Odyssey key fobsMost Honda Pilot and Odyssey key fobs use a CR2032 coin cell battery. Some older flip keys and basic remotes may use CR1616 or CR2025, so always:
Check the writing on your old battery Or look in your owner’s manual under “keyless entry” or “remote”When you shop, look for name‑brand CR2032 batteries labeled as key fob compatible. That’s what holds up best in daily U.S. use (temperature swings, remote start, constant locking/unlocking).
How the larger fob design changes the opening processPilot and Odyssey smart keys are usually bigger and thicker than Civic/Accord fobs, which slightly changes how you open them:
Slide the emergency key release and pull the metal key out Use the key blade or a small flathead screwdriver in the case notch to twist gently Work around the edge, not straight in, so you don’t crack the shell Keep the buttons facing down when you open the case to oid dropping the circuit boardBecause these are bulkier fobs, the plastic can flex more, so don’t force it. A slow, even twist is all it should take.
Things to watch for on minivan and SUV smart keysPilot and Odyssey fobs usually he more buttons (power sliding doors, power tailgate, remote start), which makes them a bit more sensitive when you change the battery. Watch for:
Rubber seals: Make sure the rubber gasket is seated correctly to keep out dust and moisture (important for family vans and SUVs that see a lot of outdoor use). Button alignment: Confirm all buttons press normally before you snap the case tight. Polarity: Insert the new CR2032 with the “+” side facing the same way as the old one. Range issues: If range is poor right after a swap, remove the battery, gently wipe the contacts with a dry cloth, and reseat it flat.Spending an extra 30 seconds on the seal, contacts, and button feel will se you from dealing with a Pilot or Odyssey key fob not working right after a battery replacement.
Older Honda Key Fobs and Special CasesOlder Honda key fobs (roughly pre‑2013) use a mix of coin batteries, so don’t assume they all take a CR2032.
Common battery types for pre‑2013 Honda key fobsMost older Honda key fobs and remotes use one of these:
CR1616 – very common on early Civic, Accord, and CR‑V remotes CR1620 – used on some compact older fobs CR2025 / CR2032 – show up on later 2000s remotes and smart keysThe easiest way to confirm the Honda key fob battery type is to open the case and read the markings on the old cell. You can also match your remote style to a compatible replacement like our 2005–2008 Honda 3‑button key fob replacement, then buy the same battery size listed there.
How to handle older flip keys and basic remotesWhen you replace the battery in an older Honda key fob or flip key, go slower than you would on a new smart key:
Remove any visible screws first (usually a tiny Phillips screw on the back). Use a small flathead or plastic pry tool to separate the case at the seam—don’t twist hard or you’ll crack the plastic. Watch for loose rubber pads and tiny springs inside flip keys; set them aside in order so you can reassemble easily. Swap the coin cell with the same size and voltage, positive (+) side usually facing up.If the shell is already worn or cracked, it can be smarter to move the circuit board into a fresh replacement shell designed for your model year, like other options you’ll find in our Honda section or by browsing by year (for example the 2004 model catalog).
When to check the owner’s manual or call a dealerFor some special cases, it’s better to double‑check before you pry anything:
No visible seam or screws on the key fob Integrated key + fob units where the metal key and buttons are one molded piece Aftermarket or previously replaced remotes that don’t match OEM styleIn these situations:
Check your owner’s manual under “Keys” or “Remote Entry” for the exact battery size and opening method. Call a Honda dealer or locksmith if you’re unsure. A quick phone call can se you from breaking an older remote that’s hard to replace.If you’re ever in doubt, it’s cheaper to get professional help than to risk damaging the circuit board while replacing a Honda key fob battery yourself.
Common Problems After Replacing a Honda Key Fob BatteryEven if you replace the Honda key fob battery correctly, a few common issues can pop up. Here’s how I’d walk through the main problems and fixes.
Key fob not working at all after new batteryIf your Honda key fob is dead right after a battery swap:
Confirm battery type and size – Most newer Honda key fobs use a CR2032, but some use CR1616, CR1620, or CR2025. The wrong size may fit loosely and lose contact. Check battery orientation – The “+” side must face the correct direction (usually up). Flip it and test again. Make sure the battery is fresh – Cheap coin cells or old stock from a dollar bin often arrive weak or dead. Stick with name brands. Verify the case is fully snapped together – If the shell isn’t closed all the way, the buttons may not press the internal switches.If your fob shell is already cracked or badly worn, a full Honda key fob replacement (case + board swap) like our 4‑button Honda remote shells can be a smarter long‑term fix than fighting with a broken housing.
No light or response when pressing buttonsWhen there’s no LED flash and no lock/unlock response:
Press each button firmly – Make sure the rubber pad is lined up with the tiny switches on the circuit board. Inspect the battery for movement – If it slides or wiggles, the contacts aren’t grabbing it tightly. Check for corrosion – White/green residue on the metal contacts can block power.You can clean lightly corroded contacts with:
A cotton swab lightly dipped in 90%+ isopropyl alcohol Gentle pressure only – no scraping toolsLet everything dry completely before reinstalling the battery.
Honda not recognizing the key fob after battery changeSometimes the key fob has power, but the car ignores it:
Stand closer to the car – Weak signal can be from low voltage or interference. Test right next to the driver’s door. Try the backup key fob – If the second fob works, the issue is likely with the first fob, not the car. Cycle the car power – Lock/unlock manually with the key (or door button), then try the fob again. Check for aftermarket electronics – Remote starters or alarm systems can sometimes interfere with Honda’s OEM keyless entry.If your fob case is heily damaged, you may want to move your internal circuit board into a new Honda replacement key fob shell to restore range and reliability.
Cleaning battery contacts and reseating the batteryA poor connection is one of the biggest reasons a Honda key fob battery replacement “doesn’t work”:
Remove the battery. Wipe the metal contacts gently with a clean, dry cloth or alcohol swab. Make sure the spring contacts aren’t bent flat – they should put light pressure on the coin cell. Reinstall the battery with correct polarity and make sure it snaps firmly into place. When reprogramming a Honda key fob might be neededMost of the time, you do not need to reprogram a Honda key fob after a simple battery change. Reprogramming might be needed when:
The fob was already unreliable long before the battery died. You’ve replaced the entire key fob or circuit board, not just the battery. The car’s immobilizer or keyless system has been reset, repaired, or the battery was disconnected for a long period.In those cases:
Check the owner’s manual for keyless entry programming steps. Call a Honda dealer or a trusted locksmith if DIY programming isn’t supported for your model/year. How to oid damaging the circuit board or caseTo keep from killing a good fob while changing the battery:
Use a plastic pry tool or small flathead wrapped in tape to open the case – never twist hard metal directly on the plastic. Open at the seam only – Don’t pry under the rubber buttons or around the metal key ring. Don’t touch the chip components – Oils and pressure on the circuit board can crack solder joints. Hold the board by the edges. Avoid over‑tightening any screws inside older flip keys – snug is enough.Handle the fob like a small electronic device, not a key ring, and a DIY Honda key fob battery replacement will be quick, clean, and problem‑free.
How Often to Replace a Honda Key Fob Battery Typical Honda Key Fob Battery LifespanFor most modern Honda smart keys and remotes, the battery (usually a CR2032) lasts 2–4 years with normal daily use. If you use remote start often, drive short trips, or live in very hot or very cold areas, expect closer to 2 years.
Signs Your Honda Keyless Entry Battery Is Getting WeakWatch for these early warnings that it’s time to replace your Honda key fob battery:
You he to press buttons multiple times to lock/unlock The range drops – you need to stand closer to the car The LED on the fob is dim or doesn’t light up at all For push-button start models, you see a “Keyless Remote Battery Low” or similar message on the dash The car only starts when you hold the fob right up to the start buttonIf you’re seeing any of these, plan a DIY Honda key fob battery replacement before it dies completely.
Why You Should Replace Both Honda Key Fob Batteries TogetherIf you he two Honda remotes (which most U.S. owners do), I strongly recommend replacing both key fob batteries at the same time:
You oid one fob dying out of nowhere It’s cheap insurance compared to dealer visits or lockouts You keep both fobs on the same maintenance schedule If one battery is weak, the other usually isn’t far behindA quality replacement battery for a Honda key fob is inexpensive, and swapping both at once ses time and headaches.
Keep a Spare CR2032 Battery HandyBecause so many Honda key fobs use a CR2032 coin cell, it’s smart to keep a spare:
In your home: glove drawer, key bowl, or toolbox In your car: center console or glove box (in original packaging, away from heat and metal objects) With your spare key: taped inside a small bag or caseThat way, if you ever run into a dead Honda key fob situation in your driveway or garage, you can swap in a replacement battery for your Honda key fob in minutes instead of waiting on a shop or dealer.
If your fob ever stops responding and you’re worried it might be lost somewhere in the vehicle, using a few simple tricks from a guide on how to find a lost key fob in your car can se you a lot of time and stress.
Choosing the Best Replacement Battery for Your Honda Key FobWhen you replace the battery in a Honda key fob, the quality of that coin cell matters more than most people think. A weak or unstable battery can cause random no‑start issues, shorter range, or a fob that dies way sooner than it should.
Why Battery Quality Matters for Honda Smart KeysHonda smart keys and push‑button start systems are sensitive to voltage. A poor‑quality coin cell can lead to:
Intermittent “Key Not Detected” messages Reduced keyless entry range Fob cutting out in cold or hot weather Faster drain, so you’re replacing batteries constantlyA solid CR2032 Honda key fob battery keeps the signal strong and stable, which means fewer headaches for you.
Benefits of Name‑Brand / Honda‑Compatible CR2032 BatteriesFor most modern Honda models, a CR2032 is the standard Honda key fob battery type. I always recommend name‑brand or OEM‑level quality:
Good options:
BrandTypeWhy It Works Well for Honda Key FobsPanasonicCR2032Very stable voltage, long life, widely used in OEMsEnergizerCR2032Easy to find in the U.S., reliable performanceDuracellCR2032Strong reputation, long shelf lifeSony / MaxellCR2032Consistent quality, good for smart keysKey benefits:
Longer life (often 2–5 years in a Honda key fob) Consistent voltage for reliable locking/unlocking and push‑start Lower risk of leaks that can destroy the circuit board Better performance in hot/cold U.S. climates Risks of Cheap or No‑Name Coin Cell BatteriesThose bulk 20‑pack coin cells from random brands can cost you more in the long run:
Voltage drops quickly, so your Honda keyless entry battery feels “weak” even when new Higher chance of leaking and corroding the contacts Inconsistent size or thickness that makes the fob lose contact Very short life, meaning you’re replacing them every few monthsIn the worst case, a leaking or swollen battery can damage the fob’s circuit board, forcing you to buy a full replacement key fob, which is far more expensive than a quality battery.
What to Look for When Buying Replacement Batteries OnlineWhen you buy a replacement battery for a Honda key fob online, use this quick checklist:
Correct type: Match the exact code (CR2032, CR1616, CR1620, CR2025). Don’t guess. Fresh stock: Look for a long expiration date (4–8 years out). Sealed packaging: Factory blister packs, not loose coins in a bag. Reputable seller: High ratings, clear photos, and no “mystery” brand names. Real brand names: Panasonic, Energizer, Duracell, Sony, Maxell, etc.If you’re already shopping for other remotes or fobs, it can be smart to grab a small pack of name‑brand coin cells at the same time, just like you would when ordering a new OEM‑style key fob for another vehicle such as a Jeep Cherokee remote on KeylessBest.
Bottom line: spend the extra couple of dollars on a high‑quality CR2032 Honda key fob battery. It’s cheap insurance for a part you rely on every day.
Honda Key Fob Battery FAQs Do you need to reprogram a Honda key fob after battery change?In most cases, no reprogramming is needed after a Honda key fob battery replacement.The fob should work again as soon as the new battery is installed correctly.
You might need reprogramming if:
The fob was already hing issues before the battery died The circuit board was damaged while opening the case You’re using the wrong key fob for the vehicleWhen in doubt, your Honda dealer or a professional locksmith can reprogram it.
What to do if the Honda key fob still doesn’t workIf your Honda key fob is not working after a battery change, go through this quick checklist:
StepWhat to CheckWhat to Do1Battery polarity (+ side)Make sure the + side faces the correct direction as shown in the fob.2Battery typeConfirm it’s the exact size (CR2032, CR1616, CR2025, etc.).3Contact pointsCheck for corrosion or dirt; gently clean with a dry cotton swab.4Case fitEnsure the case is snapped tight and not flexing the battery out of place.5Spare key testTry your spare key fob to rule out a vehicle issue.If it still won’t work:
Try another new name‑brand battery Consider that the key fob itself may be faulty and might need replacement Can you use any CR2032 in a Honda key fob?You can’t just use any random CR2032. Stick to:
Lithium CR2032 coin cells only Name brands like Panasonic, Energizer, Duracell, or Maxell Fresh batteries (check the expiration date)Avoid:
Super cheap bulk or no‑name CR2032 packs Rechargeable or different chemistry coin cellsQuality matters if you want your Honda keyless entry and remote start to stay reliable.
Typical cost of a Honda key fob batteryIn the U.S., you’re usually looking at:
Where You BuyTypical Price (Per Battery)Big box store (Walmart/Target)~$3–$7Auto parts store~$4–$8Hardware / grocery store~$4–$8Online multi‑packsAs low as ~$1–$3 eachDealer battery replacement will cost more because of labor, not the battery itself.
Differences between push‑to‑start and standard Honda key fobs FeaturePush‑to‑Start Honda Smart KeyStandard Key + Remote FobMain UseKey stays in your pocket, push button startYou insert key in ignitionTypical BatteryOften CR2032Often CR1616 / CR2025 / CR2032Low Battery Symptoms“Keyless remote battery low” message, shorter range, trouble starting with key in pocketShorter range, unlock/lock only works close to carAfter Battery ChangeUsually no reprogramming neededUsually no reprogramming neededBoth types are easy to service at home with the right replacement battery for Honda key fob and a bit of care opening the case.
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