Hey there, Lexus RX 350 owners! Ever found yourself staring at a key fob that's suddenly unresponsive? Yep, dead battery blues. It's a common issue, and for the 2013 Lexus RX 350, it's something you'll likely encounter at some point. But don't sweat it! Replacing the key fob battery is a super easy DIY task. This guide will walk you through everything you need to know, from identifying the problem to popping in a fresh battery. Let's get started, shall we?

Spotting the Signs: Is Your Key Fob Battery Dead?

Before you dive into a battery replacement, it's crucial to confirm that's actually the problem. Sometimes, other issues can mimic a dead battery. Here’s what to look out for to determine if your 2013 Lexus RX 350 key fob needs a battery change:

• Unresponsiveness: This is the most obvious sign. If your key fob suddenly stops locking or unlocking your doors, or if the remote start (if equipped) doesn't work, a dead battery is the prime suspect. Try pressing the buttons multiple times from a short distance and then a longer distance. If it doesn't work at all, it's time to consider a battery replacement.
• Erratic Behavior: Does your key fob work intermittently? Sometimes it unlocks the doors, sometimes it doesn’t? This is another clue that the battery is on its way out. The intermittent nature suggests that the battery has just enough juice to sometimes function, but not consistently.
• Warning Lights: While not always present, some Lexus RX 350 models might display a low-battery warning on the dashboard when the key fob battery is weak. Keep an eye out for this indicator, as it's a clear signal that a replacement is needed. This will typically appear as a key fob symbol with a battery icon, or a message in the information display.
• Proximity Issues: If your key fob has proximity features (like keyless entry where the doors unlock automatically as you approach), a weakening battery can cause the system to be less responsive. You might have to be closer to the car than usual for the doors to unlock. The range of the key fob will decrease as the battery dies. If you used to be able to unlock your car from a considerable distance, and now you have to be right next to it, the battery is probably the culprit.
• Physical Inspection: While not always foolproof, examine the key fob itself. Any signs of physical damage can also cause issues, though they aren’t directly related to the battery. Check the buttons for sticking or wear and tear. However, in most cases, if the key fob is not working and the other symptoms are present, it is most likely a dead battery.

If you notice any of these signs, it's a good bet that your 2013 Lexus RX 350 key fob needs a fresh battery. Let's get to the fun part – replacing it!

What You'll Need: Tools and Supplies

Okay, before you start, gather your supplies. Fortunately, the list is short and sweet. You won't need anything fancy, just a few common items:

• Replacement Battery: This is the most important part! For the 2013 Lexus RX 350 key fob, you'll need a CR2032 battery. These are readily available at most stores, including auto parts stores, pharmacies, supermarkets, and online retailers like Amazon. Make sure to purchase a fresh battery and check the expiration date. Avoid buying batteries that have been sitting on shelves for a long time, as their lifespan decreases over time.
• Small Flathead Screwdriver or Pry Tool: This will be your key tool for opening the key fob. A small flathead screwdriver is perfect, but you can also use a specialized pry tool if you have one. Just make sure the tool is small enough to fit into the key fob's seam without causing any damage.
• Optional: Microfiber Cloth: A microfiber cloth can be helpful to protect your key fob from scratches and to keep it clean during the battery replacement process.

That's it! Once you have these items, you're ready to proceed.

Step-by-Step Guide: Replacing the Key Fob Battery

Alright, guys, let's get down to business! Here’s a simple, step-by-step guide to replacing the battery in your 2013 Lexus RX 350 key fob:

1. Locate the Seam: First, find the seam on your key fob. Most key fobs have a visible seam where the two halves of the casing meet. This is where you'll insert your screwdriver or pry tool.
2. Open the Key Fob: Carefully insert the flathead screwdriver or pry tool into the seam. Gently twist the screwdriver or use the pry tool to separate the two halves of the key fob. Be patient and apply gentle pressure to avoid scratching or damaging the plastic. You may hear a slight click as the casing starts to separate.
3. Separate the Key Fob Halves: Once you've loosened the seam, carefully pry the two halves of the key fob apart. Some key fobs have clips that hold them together, so you may need to work your way around the edges to release all the clips. Once the two halves are separated, you should have access to the battery compartment.
4. Remove the Old Battery: Locate the battery. Usually, it's held in place by a small clip or plastic holder. Use your screwdriver or pry tool to gently pry the old battery out. Be careful not to damage any of the internal components.
5. Insert the New Battery: Take your new CR2032 battery and insert it into the battery compartment. Make sure you insert the battery with the correct polarity (+ and -) facing the right direction. The correct orientation is usually indicated inside the battery compartment. Double-check the markings to make sure the positive (+) side is facing the right way. Incorrect installation can damage the key fob.
6. Close the Key Fob: Once the new battery is in place, carefully align the two halves of the key fob and snap them back together. Make sure the clips are securely fastened. You should hear a click as the key fob snaps shut. If it doesn’t close properly, double-check that the battery is correctly positioned and that no components are obstructing the closure.
7. Test the Key Fob: Now, test your key fob to ensure it's working correctly. Try locking and unlocking your doors, and test any other functions (like remote start) that your key fob has. If everything works as expected, congratulations! You've successfully replaced your key fob battery.

And that’s all there is to it! You’ve successfully replaced your 2013 Lexus RX 350 key fob battery.

Troubleshooting Common Issues

Even though the battery replacement is straightforward, you might encounter a few hiccups. Here's how to troubleshoot common issues:

• Key Fob Still Not Working: If the key fob still doesn't work after replacing the battery, double-check the battery's polarity. Make sure you inserted it correctly. If the polarity is correct, try another new battery. There's a chance the new battery could be faulty. If the key fob still doesn't work, there might be a more serious issue, and it's best to consult a professional or your local Lexus dealership. Other internal components could be damaged.
• Difficulty Opening the Key Fob: If you're having trouble opening the key fob, make sure you're inserting the screwdriver or pry tool into the seam and not forcing it. Be patient and apply gentle, consistent pressure. You might also want to search for a video specific to your key fob model to help you visualize the process.
• Damaging the Key Fob: Be extremely careful when using the screwdriver or pry tool to avoid scratching or damaging the plastic casing or the internal components. If you're concerned about damaging your key fob, consider taking it to a professional. However, with careful handling, this is usually preventable.
• Key Fob Re-Programming: In most cases, you will not need to reprogram your key fob after replacing the battery. However, if the key fob still does not work, consult your owner's manual or a Lexus dealership. You can find information online on how to reprogram the key fob.

Tips and Tricks for a Smooth Replacement

To make the battery replacement even easier, here are a few extra tips:

• Work in a Well-Lit Area: Ensure you have plenty of light so you can clearly see the seam and the internal components of the key fob.
• Take Your Time: Don’t rush the process. Take your time, be patient, and avoid applying excessive force.
• Keep the Key Fob Clean: Wipe the key fob with a clean cloth before reassembling it to remove any dirt or debris.
• Store Spare Batteries: Keep a few CR2032 batteries handy so you're prepared for the next time your key fob battery dies.
• Watch a Video: If you're a visual learner, search for a video tutorial on YouTube. Seeing the process in action can make it even easier to understand. Search “2013 Lexus RX 350 key fob battery replacement” and you’ll find plenty of helpful videos.

Conclusion: Keeping Your Lexus RX 350 Key Fob Functional

Replacing the key fob battery in your 2013 Lexus RX 350 is a simple task that can save you time and money. By following these steps, you can easily restore full functionality to your key fob and avoid the inconvenience of a dead battery. Remember to always use the correct battery type (CR2032), and be gentle when opening the key fob. With a little care, you can keep your Lexus RX 350 key fob working like new for years to come. Now go forth, replace that battery, and enjoy the convenience of your fully functional key fob!