Is your Honda key fob displaying a low battery warning? Or perhaps it’s simply not as responsive as it used to be? Don’t worry, replacing the battery in your Honda key fob is a straightforward task you can easily do yourself. This guide will walk you through each step, ensuring you get your key fob back in top shape quickly. The good news is that Honda key fobs typically use a common and readily available CR2032 battery.
Like any battery, the one in your key fob will eventually need replacing. While my Honda key fob lasted for two and a half years before prompting a battery replacement message on the dashboard, it’s best to be proactive. Even with the warning, the key fob still functioned, but to avoid any potential issues, I switched to my spare fob and decided to tackle the battery replacement myself.
The owner’s manual provides basic instructions, but sometimes a visual guide and some real-world tips can make the process even smoother. Online videos can be helpful, but this detailed guide with photos specific to Honda key fobs will give you the confidence to handle this simple maintenance task without any hassle. No need to worry about damaging your expensive key fob – with these steps, you’ll be a key fob battery replacement pro in no time.
Step-by-Step Guide to Honda Key Fob Battery Replacement
Before you begin, gather the necessary tools and supplies. You’ll only need a couple of items for this quick job:
- New CR2032 Battery: This is the standard battery for most Honda key fobs. Consider buying a multipack to have spares for future replacements or other devices.
- Small Screwdriver or Emergency Key: A small flathead screwdriver can help to gently pry out the old battery. Alternatively, as you’ll see, the emergency key from your fob itself can be a perfect tool for opening the casing.
Now, let’s get started with the battery replacement:
Step 1: Remove the Emergency Key
Locate the small release switch on your key fob. It’s usually a small button or slider. Slide or press this switch to release the emergency key. Pull the key out and set it aside.
Side Note: The emergency key is not just for emergencies! It’s useful if your car’s 12V battery dies, preventing electronic access. You can use it to manually unlock the driver’s door and even the trunk via a lock cylinder often located behind the rear headrest on the driver’s side. This is especially helpful if your portable jump starter is unfortunately stuck in the trunk!
Step 2: Open the Key Fob Casing
With the emergency key removed, you’ll need to split the key fob casing. The owner’s manual might suggest using a coin and wrapping it in cloth to prevent scratches. However, a neat trick is to use the emergency key itself!
Locate the small tabs or slots on the side of the key fob where the emergency key was housed. These tabs are designed to allow you to pry the casing open. Insert the emergency key (or a coin/small screwdriver) into the slot between these tabs. Gently twist or pry to separate the two halves of the key fob.
The emergency key fits perfectly in these tabs, suggesting it’s designed for this purpose. It shouldn’t require excessive force. If you are concerned about scratches, you can still use a coin wrapped in a soft cloth.
Step 3: Battery Removal and Replacement
Once the casing is open, you’ll see the CR2032 battery. The instructions might warn about “losing the buttons.” This refers to the circuit board inside, to which the buttons are attached. If you’re not careful when prying out the battery, you could accidentally lift the circuit board and dislodge the buttons.
To avoid this, place the key fob flat on a table. Hold it firmly against the table with one hand while using a small screwdriver in your other hand to gently pry out the battery.
As shown in the image, the battery is held in place by small tabs. Use your screwdriver to gently push under the battery, near the indicated green arrow area in the photo, to pop it out. Remove the old battery and take note of the positive (+) and negative (-) sides to ensure you insert the new battery correctly.
Insert the new CR2032 battery, sliding it under the retaining tabs (yellow arrows in the photo) first, and then pressing down until it clicks into place.
Step 4: Reassemble the Key Fob
Carefully align the two halves of the key fob casing and press them back together. It might require a bit more pressure than you expect to snap them closed. Ensure everything is aligned correctly before applying pressure to avoid damaging the locking tabs.
A helpful tip for reassembly: Align the halves perfectly, then squeeze the end of the fob opposite to where the emergency key goes first. Once that end is secure, squeeze the key end to snap the casing completely closed. This method often requires less force and ensures a snug fit.
Tips for a Smooth Battery Replacement
- Work on a Clean Surface: This prevents losing any small parts and keeps dirt out of your key fob.
- Handle with Care: While it’s a simple process, be gentle when prying and handling the internal components.
- Consider a Protective Cover: To prevent future scratches and wear and tear on your key fob, think about getting a silicone cover. They are inexpensive and can prolong the life and appearance of your fob.
Conclusion
Replacing the battery in your Honda key fob is a quick and easy DIY task that can save you time and money compared to visiting a dealership. By using a common CR2032 battery and following these simple steps, you can keep your key fob functioning perfectly and avoid any low battery surprises. So next time you see that warning light, you’ll know exactly what to do!
