How To Replace Car Key Battery

Key Points:

• Slide or swing out the key if it’s inside your fob and check the back of the fob for a screw. If it has a screw, unscrew it with a small Phillips head screwdriver.
• Look for a slot or notch along the seam that separates the top and bottom halves of the fob. Push a coin or flathead screwdriver into the slot and lift to open the fob.
• Slide a flathead screwdriver under the coin battery to pop it out of place. Insert a new battery in the same position and snap the 2 halves of the fob closed.

When your car key starts losing its spark, it’s often a sign that the battery is running low. The good news is that replacing a car key battery is a quick and simple task you can tackle independently.

Whether you drive a Ford, Subaru, Volkswagen, or Toyota, we’ll take you through the step-by-step process of how to replace your car key battery, ensuring that you maintain the smooth functioning of your key fob. So, let’s dive in.

What is The Cost Of Car Key Battery

Commonly, these car key batteries generally cost $10 or less, though some fobs require two batteries.

How To Change A Battery In A Car Key Fob

Here we have listed all the steps to change the battery in a car key fob by yourself.

1. Check To See Which Batteries You Need

Your fob won’t work if you replace the fob battery with the wrong one. The type of key fob you have determines the types of batteries you need. The plastic casing should indicate the required kinds of batteries. Look for this indication and purchase your replacements accordingly.

2. Find The Seam On Your Key Fob

You need to open your fob to change the battery. Car key fobs open in a clamshell style. That means you can snap the fob open or close along a seam that separates it into two halves. On most fobs, this seam is along the side and divides the back and front.

3. Gently Pry Open The Fob

Knowing how to open your car’s fob is just as important as knowing how to change the fob battery. Use a flat screwdriver, small coin, or tough fingernail to open your fob at its seam. Be gentle with the process to avoid internal or external damage.

4. Locate Each Battery’s Positive & Negative Ends

Car key batteries are flat and round. Each side is embossed with a positive or negative symbol. Locate these symbols on your old and new batteries. It’s important to know how to replace the car key battery with the correct orientation. Otherwise, the charge won’t flow properly.

5. Replace Car Fob Battery

Replace the remote car key battery by inserting the new one in the same positive/negative orientation as the old one. Your old batteries should pop out easily thanks to an inbuilt spring. If not, add some extra force with the same device you used to open your casing.

In case you still can’t understand how to change car key batteries, we are attaching a video for your easiness.

FAQs – Replacing Car Key Battery

1. Why Does My Key Fob Not Work After Replacing Car Battery?

If your key fob isn’t working after replacing the batteries, you may need to reprogram it or check for loose buttons and broken battery terminals. If your remote key fob isn’t working and you’ve already replaced the battery, you may need to reprogram the key.