What battery a 2017 Honda Accord key fob uses

Most 2017 Honda Accord key fobs use a CR2032 3‑volt lithium coin cell. If your Accord has the non–push-button start key with the remote built into the key head, it may use a smaller CR1616 3‑volt coin cell—check the existing battery or owner’s manual to confirm.

How to tell which battery your Accord needs

Honda offered two common fob types for the 2017 Accord: the Smart Entry proximity fob (for push-button start) and the traditional remote-in-key (for keyed ignition). The battery type differs by fob design, and the safest way to verify is to read the code stamped on the installed battery.

Typical battery types by fob

The details below help you match your fob style to its usual battery specification.

• Smart Entry (push-button start) proximity fob: typically CR2032, 3V
• Traditional remote integrated into the key head (keyed ignition): typically CR1616, 3V

While these are the most common configurations, variations exist. If in doubt, open the fob and read the battery code or consult your owner’s manual.

Step-by-step: Replacing the key fob battery

The process is straightforward and requires only a small flat tool. Follow the steps that match your fob style. Work over a clean surface to avoid losing small parts.

1. Slide the release on the back of the fob and remove the metal key (for Smart Entry) or locate the small case seam (for integrated key remotes).
2. Insert the key tip or a small flat screwdriver into the notch at the seam and gently twist to separate the halves—avoid prying near the circuit board.
3. Note battery orientation (the “+” side is usually facing outward).
4. Remove the old coin cell and insert the new one (CR2032 for Smart Entry; CR1616 for most integrated key remotes) with the correct polarity.
5. Snap the case back together evenly; reinsert the metal key if applicable.
6. Test lock/unlock and, if applicable, proximity start. No reprogramming is typically needed after a simple battery swap.

If the fob doesn’t respond after replacement, recheck orientation, ensure the case is fully closed, and try a fresh battery from a sealed package.

Signs your key fob battery is low

Watch for these common indicators that it’s time to replace the coin cell.

• Reduced range or needing to press buttons multiple times
• Intermittent operation or delayed response
• Dashboard prompt such as “Keyless Remote Battery Low” (on Smart Entry models)
• Vehicle not detecting the fob reliably for push-button start

Addressing these symptoms promptly can prevent lockout inconveniences and ensures consistent remote operation.

Where to buy and what it costs

CR2032 and CR1616 batteries are widely available at auto parts stores, big-box retailers, pharmacies, and online. Expect to pay roughly $2–$6 per cell. Choose brand-name cells and check expiration dates for best longevity.

Safety, disposal, and tips

Coin cells are small and hazardous if swallowed. Handle and store replacements carefully, and dispose of used batteries at appropriate recycling points.

• Avoid touching the new battery’s faces; skin oils can shorten life—use gloves or hold by the edges.
• Keep old and new batteries out of reach of children and pets.
• Recycle coin cells at electronics stores or municipal collection sites.

Following these precautions helps ensure your fob works reliably and that spent batteries are handled responsibly.

Summary

A 2017 Honda Accord key fob typically uses a CR2032 3V lithium coin cell for Smart Entry (push-button start) models, while some non–push-button remotes integrated into the key head use a CR1616 3V cell. Confirm by checking the code on your current battery, and replace it by carefully opening the fob, swapping the coin cell with the correct polarity, and snapping the case closed.

What battery does a 2017 Honda Accord key fob take?

The key fob for a 2017 Honda Accord uses a CR2032 battery. This is a common, readily available 3-volt lithium coin cell battery. 
This video shows how to replace the battery in a 2013-2017 Honda Accord key fob, including the battery size: 1mFobBatteryYouTube · Sep 10, 2019

What size battery for Honda Accord key fob?

The Honda Accord key fob typically uses a CR1620 or CR2032 battery, depending on the year and model. It’s best to check your owner’s manual or the old battery itself for the exact size. 
This video demonstrates how to open the key fob and identify the battery type: 57sPYR Automotive YouTube · Feb 6, 2023
Here’s a more detailed breakdown:

• Older models (e.g., 2008-2012 8th gen): Often use a CR1616 battery. 
• 2013-2017 models: Commonly use a CR1620 battery. 
• 2018-2022 models and later: May use a CR2032 battery. 

How to identify the correct battery:

1. Check the old battery: If you still have the old battery, it will have the size printed on it. 
2. Consult your owner’s manual: The manual should specify the correct battery type. 
3. Check online resources: Websites like JustAnswer or iFixit may have information specific to your model year. 

Where to buy the battery:

• Local auto parts stores: These often carry both CR1620 and CR2032 batteries. 
• Retail stores: Stores like Walmart or Target may also have the necessary batteries. 
• Online retailers: Websites like Amazon and eBay offer a wide selection. 

You can watch this video for a step-by-step guide on replacing the battery: 22sDouble Clutch Auto ReviewsYouTube · Sep 1, 2024

What kind of battery does a 2017 Honda Accord take?

The 2017 Honda Accord uses either a Group Size 51R or Group Size 24F battery, depending on the engine. The 4-cylinder models typically use the 51R, while V6 models use the 24F. 
Here’s a more detailed breakdown:

• Group Size 51R: Commonly found in the 4-cylinder (2.4L) models.
• Group Size 24F: Commonly found in the V6 (3.5L) models. 

Factors to consider when choosing a battery:

• Cold Cranking Amps (CCA): . Opens in new tabThis indicates the battery’s ability to start the engine in cold weather. Higher CCA is generally better, especially in colder climates. 
• Reserve Capacity (RC): . Opens in new tabThis indicates how long the battery can power accessories when the engine is off. 
• Battery Type: . Opens in new tabAGM (Absorbent Glass Mat) batteries are a popular choice for their durability and performance. 

Before purchasing, it’s always a good idea to:

• Consult your owner’s manual: This will provide the exact battery specifications for your specific vehicle.
• Check the battery terminals: Make sure the battery you choose has the correct terminal type (top post or side post). 
• Consider your local climate: If you live in a cold climate, consider a battery with a higher CCA. 

You can also use online resources like AutoZone, Interstate Batteries, or Batteries Plus to find compatible batteries based on your vehicle’s year, make, and model.

What do I do if my Honda key fob battery is low?

When a Honda key fob battery is low, you can replace it yourself using a few simple steps. First, remove the emergency key from the fob. Then, use the emergency key to pry open the fob, revealing the battery compartment. Replace the old battery with a new CR2032 battery, ensuring the positive side is facing up. Finally, snap the fob back together and reinsert the emergency key, according to some videos. You can also test the key fob to confirm it’s working. 
This video demonstrates how to replace the battery in your Honda key fob: 59sStriker 50YouTube · May 27, 2024
Here’s a more detailed breakdown:

1. 1. Locate the emergency key: Most Honda key fobs have a small, hidden mechanical key that can be used to unlock the car manually if the battery dies. This key is often accessed by pushing a release on the back of the fob and sliding it out. 
2. 2. Open the fob: Use the emergency key to pry open the two halves of the fob. Some fobs have a small slot or groove where the key can be inserted to create leverage for opening. Be careful not to damage the fob while prying. 
3. 3. Remove the old battery: Once the fob is open, you’ll see the small, circular CR2032 battery. Use your fingernail or a small, flathead screwdriver to gently pry out the old battery. 
4. 4. Install the new battery: Insert the new CR2032 battery, making sure the positive (+) side is facing up (towards the button side of the fob). 
5. 5. Close the fob: Align the two halves of the fob and snap them back together firmly. Ensure the seam is flush all the way around. 
6. 6. Reinsert the emergency key: Slide the mechanical key back into its slot in the fob. 
7. 7. Test the fob: Press the buttons on the fob to confirm that the doors lock and unlock and the panic button (if available) works. 

This video shows you how to open the fob and remove the battery: 59sChris NotapYouTube · Jun 30, 2021