Hey guys! Is your 2017 Lexus RX 350 key fob starting to act up? Don't worry; you're not alone! One of the most common issues with key fobs is a dying battery. Fortunately, swapping out the battery in your Lexus RX 350 key fob is a pretty straightforward process that you can easily handle yourself. This guide will walk you through each step, ensuring you get your key fob back in tip-top shape in no time. We'll cover everything from identifying the signs of a low battery to the actual replacement process, and even some helpful tips to extend the life of your key fob battery. So, let's dive in and get that key fob working like new again!

Identifying a Low Key Fob Battery

Okay, first things first, how do you even know if your key fob battery is the culprit? Keep an eye out for these telltale signs. If your Lexus RX 350 key fob is acting finicky, it might be time for a battery change. One of the primary indicators is a decreased range. Have you noticed that you need to be much closer to your car than usual for the remote to work? That's a classic sign. If you're used to unlocking your car from a distance, but now you have to stand right next to it, the battery is likely weakening. Another common symptom is inconsistent performance. Does the key fob sometimes work and sometimes not, even when you're at the same distance from your car? This erratic behavior often points to a battery that's on its last legs. Maybe the buttons need to be pressed harder or multiple times before the car responds. This can be super annoying, especially when you're in a hurry! Also, pay attention to any dashboard warnings. Some Lexus models will display a warning message on the dashboard indicating a low key fob battery. If you see this message, it's a clear signal to replace the battery ASAP. Ignoring these early signs can lead to complete failure, which means you might find yourself unable to unlock or start your car remotely. Nobody wants that! Addressing the issue promptly will save you from potential headaches and keep your Lexus RX 350 running smoothly.

Gathering Your Tools and Supplies

Before you get started, let’s make sure you have everything you need. Having the right tools on hand will make the process much smoother and prevent any accidental damage to your key fob. The most important thing is the correct replacement battery. For the 2017 Lexus RX 350 key fob, you'll typically need a CR2032 battery. These are widely available at drugstores, supermarkets, auto parts stores, and online retailers. It’s always a good idea to have a spare or two on hand, just in case! You'll also need a small, flat-head screwdriver. This will be used to gently pry open the key fob case. Make sure it’s a small one to avoid scratching or damaging the plastic. A small, plastic pry tool can also be useful, especially if you're concerned about scratching the key fob. These are often included in electronics repair kits. Additionally, grab a soft cloth or towel. This will protect the key fob while you're working on it and prevent any scratches or scuffs. Find a clean, well-lit workspace. This will help you see what you're doing and avoid losing any small parts. Good lighting is key! Finally, consider having a small container or bag to keep the screws and battery in. This will prevent them from rolling away and getting lost. With these tools and supplies ready, you'll be well-prepared to tackle the key fob battery replacement like a pro. Trust me; being organized makes the whole process a breeze!

Step-by-Step Battery Replacement Guide

Alright, let's get down to the nitty-gritty. Follow these steps carefully to replace the battery in your 2017 Lexus RX 350 key fob:

1. Prepare the Key Fob: Start by placing the key fob on your soft cloth or towel. This will protect it from scratches. Make sure the Lexus logo is facing down. Locate the small release button or latch on the back or side of the key fob. This button usually releases the physical key. Press and hold the release button while gently pulling out the metal key.
2. Open the Key Fob: Once the key is removed, you'll see a small slot or notch. This is where you'll insert your flat-head screwdriver or plastic pry tool. Carefully insert the tip of the screwdriver into the slot and gently twist. This should start to separate the two halves of the key fob. If it doesn't come apart easily, try wiggling the screwdriver slightly or inserting it at a different angle. Be patient and avoid using excessive force, as you don't want to break the plastic. Work your way around the seam, gently prying until the key fob is completely open. You may hear a few clicks as the clips release.
3. Remove the Old Battery: With the key fob open, you'll see the battery. It’s usually held in place by a small clip or bracket. Take a close look at how the battery is oriented before you remove it. This will help you install the new battery correctly. Use your fingertip or the tip of the screwdriver to gently push the battery out of its holder. Be careful not to damage the surrounding components.
4. Install the New Battery: Take your new CR2032 battery and insert it into the battery compartment. Make sure the positive (+) side is facing the correct direction (usually upwards). Refer to the markings inside the key fob or the orientation of the old battery if you're unsure. Press down on the battery until it clicks into place. Ensure it's securely seated in the holder.
5. Reassemble the Key Fob: Align the two halves of the key fob and press them together until they snap back into place. You should hear a click as the clips engage. Make sure the seam is flush all the way around. If it doesn't close properly, double-check that the battery is correctly installed and that there are no obstructions. Once the key fob is securely closed, reinsert the metal key until it clicks into place. Test the key fob by pressing the buttons to see if it locks and unlocks your car. If it works, congratulations! You've successfully replaced the battery. If not, double-check all the steps and try again. Sometimes, it just takes a little patience and persistence.

Tips for Extending Key Fob Battery Life

Want to get the most out of your key fob battery? Here are a few tips to help extend its life: Avoid excessive button pressing. Resist the urge to constantly press the buttons on your key fob when you're not using them. Each press consumes battery power, so only use the buttons when necessary. Keep your key fob away from extreme temperatures. Extreme heat or cold can drain the battery faster. Avoid leaving your key fob in direct sunlight or in a freezing car. Store your key fob in a cool, dry place when you're not using it. This helps preserve the battery's charge. Consider a key fob protector. These cases can help shield your key fob from physical damage and exposure to extreme temperatures. Replace the battery proactively. Don't wait until the battery completely dies. Replace it every one to two years, even if it's still working. This prevents unexpected failures. Use the manual key entry as needed. Relying solely on the remote functions can drain the battery faster. Use the physical key to unlock your car occasionally. Check the battery expiration date. When you buy a new battery, check the expiration date to ensure it's fresh. A battery that's been sitting on the shelf for a long time may not last as long. By following these tips, you can maximize the lifespan of your key fob battery and avoid frequent replacements. A little bit of care can go a long way in keeping your key fob working reliably.

Troubleshooting Common Issues

Even with careful attention, you might encounter a few hiccups during the battery replacement process. Here are some common issues and how to troubleshoot them: Key Fob Won't Open: If you're having trouble opening the key fob, double-check that you're using the correct tool and applying gentle pressure. Avoid using excessive force, as this can damage the plastic. Try wiggling the screwdriver or pry tool slightly to release the clips. Battery Won't Come Out: If the battery is stuck, use the tip of the screwdriver or your fingertip to gently push it out from the side. Be careful not to damage the surrounding components. Make sure you're pushing in the correct direction. Key Fob Won't Close: If the key fob won't close properly, ensure the battery is correctly installed and that there are no obstructions. Check that the two halves are aligned correctly and press firmly until they snap together. If the problem persists, double-check that all the clips are intact. Key Fob Still Doesn't Work: If the key fob still doesn't work after replacing the battery, try the following: Double-check that the battery is new and has sufficient charge. Make sure the battery is installed with the correct polarity (+ side facing up). Clean the battery contacts with a cotton swab and rubbing alcohol. Resync the key fob with your car by following the instructions in your owner's manual. If none of these steps work, you may need to take your key fob to a Lexus dealer for further diagnosis. They may need to reprogram the key fob or replace it altogether. Don't get discouraged if you encounter these issues. Most of them can be resolved with a little patience and persistence. And remember, if you're ever unsure about any step, it's always best to consult your owner's manual or seek professional help.

Replacing the battery in your 2017 Lexus RX 350 key fob is a simple task that can save you time and money. By following this guide, you can confidently tackle the replacement process and keep your key fob working like new. Remember to gather the right tools, follow the steps carefully, and take precautions to extend battery life. And if you encounter any issues, don't hesitate to seek help from a professional. With a little bit of effort, you can keep your Lexus RX 350 running smoothly and enjoy the convenience of a fully functional key fob. Good luck, and happy driving!