The 2020 Honda key fob typically uses a CR2032 coin-cell battery. Replacing it is a quick DIY task that usually doesn’t require reprogramming a nearby car key fob. Here’s how to do it safely and effectively.
What you’ll need
Before you start, gather the right battery and basic tools. The common battery for most 2020 Honda fobs is CR2032.
- CR2032 3V coin-cell battery
- Small flat-head screwdriver or a coin to pry the fob apart
- Clean cloth or gloves (optional)
- Owner’s manual or the current battery to confirm the type
Note: Some Honda fob variants may use a different size (for example CR1632). If in doubt, check the existing battery or the owner's manual to confirm the correct size.
Step-by-step replacement
Follow these steps to replace the battery in your 2020 Honda key fob. A coin or small screwdriver is usually enough to separate the case.
- Remove the mechanical key blade by sliding the release and pulling the key out of the fob.
- Locate the seam around the fob and carefully pry the two halves apart with a coin or flat-head screwdriver, applying gentle pressure.
- Lift out the old battery and note its orientation (which side is facing up).
- Insert the new CR2032 with the + side facing up (the positive side should be oriented as indicated by the old battery or the fob’s design).
- Snap the two halves back together and reinsert the mechanical key blade.
- Test the remote by pressing the lock/unlock buttons to confirm the battery works.
After reassembly, your fob should function normally once the new battery is in place. If it doesn’t respond, recheck the battery orientation and ensure the contacts are clean and free of debris.
Care, disposal and other tips
Recycle the old battery at a local battery recycling facility or hazardous waste center. Handle the fob gently to avoid damage to the circuit board, and keep it away from moisture. In most cases, no reprogramming is required after replacing the battery, but if you experience continued issues, consult the owner’s manual or contact a Honda dealer for assistance.
Reprogramming and troubleshooting
In typical scenarios, replacing the battery is all that’s needed and the fob will function again. If the car doesn’t respond after battery replacement, try a spare fob to rule out a fob-specific issue, verify there’s no corrosion on the contacts, and ensure the vehicle’s receivers are functioning properly.
Summary: A CR2032 battery is standard for the 2020 Honda key fob. Open the fob, swap in the new battery with correct polarity, reassemble, and test. Always verify the battery type before purchasing and dispose of the old battery responsibly.
Does the Honda key fob need to be reprogrammed after replacing the battery?
The good news is that most of the time, you don't actually need to reprogram a Honda key fob after battery replacement. It often starts working again once the battery is in the right way. But in some cases, it might need a few extra steps.
Can I replace my Honda key fob battery myself?
And then twist. Your key fob isn't open all the way yet so now you'll need to use the key end and wedge it between the gap. And pop it. Open.
What tools do I need to open a Honda key fob?
Use a Flathead Screwdriver: Gently insert the flathead screwdriver or plastic pry tool into the seam. Apply light pressure to separate the two halves. Be cautious not to damage the plastic housing.
How do I change the battery in a 2020 Honda key fob?
Key can get it done just not as easy. Take out your dead. Battery. Make sure you place your new one positive side facing upward just like that squeeze these two halves back.