Is your 2010 Volvo S40 key fob starting to feel a little unresponsive? It might be time for a battery change. Fortunately, replacing the battery in your Volvo S40 key fob is a straightforward task you can easily handle yourself. This guide will walk you through the simple steps to get your key fob working like new again.
What You’ll Need
Before you begin, gather these few items:
- A new CR2025 3V lithium coin battery. This is the standard battery for most Volvo S40 key fobs.
- Strong hands or a small flat blade screwdriver (optional, for prying).
- An optional 5-level mortice key or similar thin tool to help with the corner ring.
Step-by-Step Guide to Battery Replacement
Follow these steps to replace your 2010 Volvo S40 Key Fob Battery:
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Remove the Corner Ring: Locate the small metal ring at the corner of your key fob. This ring needs to be removed first. Carefully pry it off. Be gentle to avoid snapping the plastic corner of the fob. Using your fingernails or a small tool can help.
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Open the Key Fob Casing: Flip open the actual key blade as if you were going to start the car. With the key flipped open, you’ll see a seam on the back of the fob. The lower section of the back panel needs to be pulled off in the direction indicated in the image below. You can use your fingernail, a small flathead screwdriver, or even twist a coin in the seam to gently pry it open.
Warning: It’s best to do this over a desk or table. When the back panel comes off, the battery can easily fall out. You want to be able to quickly retrieve it and replace it, rather than losing it inside your car.
Inside view of a Volvo S40 key fob after opening the back panel, showing the battery compartment -
Replace the Old Battery: Remove the old CR2025 battery. Take your new CR2025 battery and insert it into the battery compartment. Ensure the positive (+) side of the battery is facing upwards, which is usually indicated in the battery compartment. These batteries are known for their long life, often exceeding 10 years. Consider marking the replacement date on the new battery with a permanent marker as a reminder for future changes.
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Reassemble the Key Fob: Place the back cover back onto the key fob. Line up the corner where the metal ring attaches first. Then, press firmly with your thumbs to snap the cover back into place.
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Reattach the Corner Ring: Replacing the small corner ring can be a bit tricky. You might find it helpful to use a thin tool like a 5-lever mortice key or a small screwdriver to gently pry the ring open and hold it while you push it back onto the key fob.
You’re All Set!
That’s all there is to it! You’ve successfully replaced the battery in your 2010 Volvo S40 key fob. Your key fob should now be working perfectly again. This simple maintenance can save you time and money compared to visiting a dealership for a battery replacement.
