how to change battery in a lexus key fob

Daniel Parker

3 min read

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07-02-2025

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Meta Description: Learn how to easily replace the battery in your Lexus key fob! This comprehensive guide provides clear, step-by-step instructions with pictures, ensuring a quick and painless battery change. Save money and time by tackling this simple task yourself. We cover various Lexus key fob models and offer helpful tips for troubleshooting.

Identifying Your Lexus Key Fob Type

Before starting, it's crucial to identify the type of Lexus key fob you have. Lexus has produced several key fob designs over the years. The battery replacement process varies slightly depending on the model. Common types include:

• Smart Key with Push-Button Start: This is the most common type, featuring a sleek design and push-button ignition.
• Traditional Key with Remote: This type has a separate key blade that folds out and a more compact remote.
• Key with Integrated Remote: The key and remote are integrated into a single unit.

(Include Images Here: Show examples of 3 different Lexus key fob types) Alt text for images should be descriptive, e.g., "Lexus Smart Key Fob," "Lexus Traditional Key Fob," "Lexus Integrated Key Fob."

Tools You'll Need

You'll only need a few simple tools for this job:

• A small flathead screwdriver (or similar prying tool): This is used to carefully pry open the key fob casing.
• A replacement CR2032 battery: This is the most common battery type used in Lexus key fobs. You can purchase these at most electronics stores, auto parts stores, or online.

Step-by-Step Instructions: Replacing Your Lexus Key Fob Battery

While the exact steps may vary slightly depending on your specific key fob model, the general process is similar. Always refer to your owner's manual for model-specific instructions.

Step 1: Locate the Key Fob Release Mechanism

Carefully examine your key fob for a small seam or release button. This is usually located on the side or back of the fob.

(Include Image Here: Close-up image of a key fob showing the release mechanism.) Alt text: "Lexus key fob release mechanism."

Step 2: Carefully Pry Open the Key Fob

Using your small flathead screwdriver (or other suitable tool), gently insert it into the seam and pry the two halves of the key fob apart. Avoid using excessive force, as you could damage the plastic casing.

(Include Image Here: Close-up image of someone carefully prying open a key fob.) Alt text: "Gently prying open a Lexus key fob."

Step 3: Access the Battery

Once the key fob is open, you'll see the battery compartment. It might be held in place by a small metal clip or simply rest in its compartment.

(Include Image Here: Close-up image of the battery compartment inside the key fob.) Alt text: "Lexus key fob battery compartment."

Step 4: Remove the Old Battery

Gently remove the old CR2032 battery. Note its orientation (positive (+) side up).

(Include Image Here: Close-up image showing the old battery being removed.) Alt text: "Removing the old battery from Lexus key fob."

Step 5: Insert the New Battery

Insert the new CR2032 battery, making sure it's oriented correctly (positive (+) side up). The same way as the old one was.

(Include Image Here: Close-up image showing the new battery being inserted.) Alt text: "Inserting the new battery into Lexus key fob."

Step 6: Reassemble the Key Fob

Carefully snap the two halves of the key fob back together. They should fit snugly.

(Include Image Here: Close-up image showing the key fob being reassembled.) Alt text: "Reassembling Lexus key fob."

Step 7: Test the Key Fob

Test your key fob to ensure that the new battery is working correctly. Try locking, unlocking, and opening the trunk or tailgate.

Troubleshooting

• Key fob still not working: Double-check the battery's orientation. If the problem persists, the battery may be faulty. Try a new one.
• Key fob is intermittently working: The battery might be nearing the end of its life, even if a new one was just installed. Consider replacing it again.

Maintaining Your Lexus Key Fob

Replacing the battery regularly will help maintain the functionality of your key fob. Consider replacing it every 1-2 years, or sooner if you notice decreased range or performance.

This guide should help you successfully change the battery in your Lexus key fob. Remember to always consult your owner's manual for model-specific instructions. If you're still having trouble, consider taking your key fob to a qualified mechanic or Lexus dealership.