How to Replace Your Lexus Key Fob Battery: A Simple Step-by-Step Guide

Is your Lexus key fob struggling to unlock your car doors, or perhaps the remote start is becoming unresponsive? It might be time to replace the battery. Many Lexus owners face this common issue, and thankfully, it’s a straightforward task you can easily handle yourself. This guide will walk you through the process of replacing your Lexus key fob battery, saving you time and a trip to the dealership.

Before you begin, let’s gather the few items you’ll need for this quick DIY project.

What You’ll Need:

A new battery: You’ll typically need a CR2032 battery, but it’s always best to double-check your Lexus owner’s manual or the old battery itself to confirm the exact type. You can find these batteries at most drugstores, supermarkets, and online retailers.
A small flathead screwdriver or a similar tool: This will be used to gently open the key fob casing. A small coin or even your car key can sometimes work in a pinch.
A soft cloth (optional): To protect the key fob from scratches.

Step-by-Step Guide to Lexus Key Fob Battery Replacement:

Locate the notch or release button on your key fob. Examine your Lexus key fob closely. You should find a small notch, seam, or a release button designed to open the casing.
Open the key fob casing. Using your flathead screwdriver (or chosen tool), gently insert it into the notch or press the release button. Carefully twist or pry to separate the two halves of the key fob. Avoid using excessive force to prevent damage to the casing.
Identify the battery location. Once the key fob is open, you’ll see the battery compartment. Take note of the battery’s orientation – specifically, which side is facing up (+ or -). This is important for correct installation later.
Remove the old battery. The battery might be held in place by small clips. Gently use your fingertip or the tip of the screwdriver to nudge the old battery out of its compartment.
Insert the new battery. Place the new CR2032 battery into the compartment, ensuring the correct orientation (the same as the old battery). You should feel it snap or click into place.
Close the key fob casing. Carefully align the two halves of the key fob casing and press them firmly together until they snap back into place. Ensure there are no gaps and the casing is securely closed.
Test your key fob. Try locking and unlocking your Lexus doors or using the remote start to confirm the new battery is working correctly.

Dealing with Stubborn Screws (If Applicable):

While most Lexus key fobs are designed to be opened without screws, some older models or specific designs might have small screws securing the casing. If you encounter screws:

Check for tiny screws. Look closely around the edges of the key fob for very small screws. They might be recessed or hidden.
Use a precision screwdriver set. If you find screws, you’ll need a precision screwdriver set with appropriately sized heads to remove them. These sets are readily available online and in hardware stores.
Be gentle. Work slowly and carefully to avoid stripping the screw heads.
Store screws safely. Once removed, place the screws in a safe place so you don’t lose them during the battery replacement process. You’ll need to re-install them when closing the key fob.

Conclusion:

Replacing your Lexus key fob battery is a simple maintenance task that any owner can accomplish with minimal effort and just a few minutes. By following these steps, you can restore your key fob’s functionality and avoid unnecessary dealership costs. Keep a spare CR2032 battery on hand, and you’ll be prepared to handle this common issue whenever it arises, ensuring you always have reliable access to your Lexus vehicle.

How to Replace Your Lexus Key Fob Battery: A Simple Step-by-Step Guide

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