Is your Acura key fob starting to feel a little unresponsive? Or perhaps you’re just getting the low battery warning light on your dashboard? Don’t worry, replacing the battery in your Acura key fob is a quick and easy task you can do yourself, saving you time and money compared to a dealership visit. This guide will walk you through the simple steps to replace your Acura key fob battery and keep you on the road with confidence.
What Battery Do You Need for Your Acura Key Fob?
Most Acura key fobs, including models like the MDX, TLX, RDX, and others, use a CR2032 3-volt lithium coin cell battery. This type of battery is widely available at most drug stores, grocery stores, and electronics retailers. You can easily find brands like Panasonic, Duracell, Energizer, and others. It’s always a good idea to check your owner’s manual to confirm the exact battery type for your specific Acura model and key fob, but CR2032 is the most common.
Step-by-Step Guide to Replacing Your Acura Key Fob Battery
Replacing the battery is a straightforward process that requires no special tools. Here’s how to do it:
Step 1: Remove the Metal Key
Locate the small release button on your Acura key fob. Press and hold this button while you gently pull out the metal valet key. This key is usually located at the bottom or back of the fob, depending on your model.
Step 2: Open the Key Fob Casing
Once the metal key is removed, you’ll see a small slot or seam where the two halves of the key fob casing join together. Use a thin coin, like a penny or a small screwdriver (be careful not to scratch the plastic), to gently pry open the two halves of the fob. Insert the edge of the coin into the slot and twist gently to separate the casing. The fob should pop open easily.
Step 3: Replace the Old Battery with a New One
With the key fob open, you’ll see the old CR2032 battery. Take note of the battery’s orientation – usually, the positive (+) side is facing up. Carefully remove the old battery. You might be able to use your fingertip or the tip of the metal key to gently nudge it out. Insert the new CR2032 battery, making sure to place it in the same orientation as the old one (positive side up).
Step 4: Reassemble the Key Fob
Carefully snap the two halves of the key fob casing back together. Ensure they are firmly closed and that there are no gaps. Finally, slide the metal valet key back into its slot until it clicks into place.
Understanding Key Fob Battery Voltage and Lifespan
New CR2032 batteries typically have a voltage around 3.2 to 3.3 volts. As the battery ages and is used, this voltage will gradually decrease. In the original author’s experience with a 2014 Acura MDX key fob after 2 years of use, the old batteries measured around 2.93 to 2.95 volts. This suggests that even after two years, there was still some life left in the original battery.
However, factors like temperature, frequency of use, and the specific design of the key fob circuitry can affect battery life. Proactively replacing the battery every 2-3 years is a good preventative measure to avoid being stranded with a dead key fob, especially in inconvenient situations. Given the low cost of CR2032 batteries, it’s a worthwhile bit of preventative maintenance for your Acura.
Conclusion: Stay Ahead of Key Fob Battery Issues
Replacing your Acura key fob battery is a simple and cost-effective way to ensure your vehicle access remains reliable. By following these easy steps, you can avoid potential headaches and keep your Acura key fob working perfectly. Consider replacing your battery every couple of years as a part of your regular car maintenance routine.
