Is your Lexus key fob starting to feel less responsive than usual? You might be experiencing the common issue of a low battery. Fortunately, replacing the battery in your Lexus key fob is a straightforward task you can easily handle yourself. This guide will walk you through the process, ensuring you can get back to enjoying the convenience of your Lexus key fob in no time.
Recognizing When Your Lexus Key Fob Battery Needs Replacing
Before your Lexus key fob completely stops working, it usually gives you some warning signs. Recognizing these early indicators can prevent you from being caught off guard. Here are common signs that your Lexus key fob battery is nearing the end of its life:
- Reduced Range: You need to be much closer to your Lexus than usual for the key fob to lock, unlock, or start the engine. The effective detection area becomes noticeably smaller.
- Dashboard Battery Warning: Your Lexus may display a low-battery warning light or message on the dashboard when you stop the engine. This is a clear signal that your key fob battery is weak.
- Button Unresponsiveness: You press buttons on your key fob, but nothing happens. Some buttons might work intermittently while others become completely unresponsive.
- Faint or Absent LED Light: The small LED indicator light on your Lexus key fob, which usually illuminates when you press a button, either doesn’t light up at all or appears very dim.
- Push Button Start or Smart Access Issues: Your Lexus’ push-button start system or smart access features become unreliable or stop functioning altogether.
Step-by-Step Guide: Changing Your Lexus Key Fob Battery
Changing your Lexus key fob battery is a simple DIY task. Gather a few basic tools, and follow these easy steps to get your key fob working like new again.
Tools You’ll Need
Before you begin, make sure you have these simple tools ready:
- Flathead Screwdriver or Small Coin: This tool will be used to gently open the key fob casing. A small coin, like a penny or nickel, can work just as effectively as a screwdriver and may be less likely to scratch the plastic.
- Replacement Battery: You’ll need the correct type of battery for your Lexus key fob. Common types are CR1632 or CR1616 Panasonic batteries, but always check your Lexus owner’s manual to confirm the specific battery needed for your model and year.
Step 1: Remove the Mechanical Key
Locate the small release button or latch on the side or bottom of your Lexus key fob. Press and hold this button to release the metal mechanical key that is stored inside. Slide the mechanical key out and set it aside. This key is a backup to manually unlock your car door if needed.
Step 2: Open the Key Fob Casing
With the mechanical key removed, you’ll see a small indentation or slot on the key fob casing, usually where the mechanical key was located. Insert the tip of your flathead screwdriver or the edge of your small coin into this slot. Gently twist the screwdriver or coin to pry the key fob casing open. Apply gentle pressure and avoid forcing it to prevent damage to the plastic. The casing should pop open relatively easily.
Step 3: Battery Removal and Replacement
Once the key fob casing is open, you’ll see the old battery. Some Lexus key fobs may have a small electronic module covering the battery. If present, carefully remove this module to access the battery. Use your flathead screwdriver or small coin again to gently pry the old battery out of its compartment. Take note of the battery orientation – specifically, which side is facing up (usually the “+” positive terminal). Install the new battery, ensuring the “+” terminal is facing upwards, matching the orientation of the old battery.
Step 4: Reassemble and Test
After inserting the new battery, replace the electronic key module if you removed one. Carefully snap the two halves of the key fob casing back together until they are securely closed. Finally, slide the mechanical key back into its slot until it clicks into place. Test the key fob by pressing the lock, unlock, and panic buttons to ensure they are working correctly and that the LED indicator light illuminates.
If your Lexus key fob still doesn’t work after replacing the battery, or if you encounter any difficulties during the process, it’s recommended to seek assistance from a certified Lexus dealer. Their trained technicians can diagnose any potential issues and ensure your key fob is functioning properly.
Identifying the Correct Battery for Your Lexus Key Fob
Using the correct battery type is crucial for optimal key fob performance and longevity. While many newer Lexus models (from 2010 onwards) commonly use CR1632 or CR1616 Panasonic batteries, the specific battery type can vary depending on your Lexus model year and trim.
The most reliable way to determine the correct battery for your key fob is to consult your Lexus owner’s manual. This manual contains detailed information about your vehicle, including key fob battery specifications. Alternatively, you can contact the parts department at a Lexus dealership, like Longo Lexus Parts Department, for expert assistance in identifying and obtaining the right battery for your specific Lexus key fob.
Lexus Key Fob Battery Lifespan and Maintenance
A genuine Lexus key fob battery typically lasts between one and two years under normal use. However, several factors can influence battery life, including frequency of use, environmental conditions, and battery quality. Using aftermarket batteries might result in a shorter lifespan compared to genuine Lexus replacement parts. Investing in genuine Lexus batteries from an authorized dealer like Longo Lexus ensures optimal performance and durability.
Extending Battery Life: Power Saving Mode
Lexus smart key fobs are equipped with a power-saving mode designed to conserve battery life when the key fob is not in active use. To activate power-saving mode, press and hold the “Lock” button on your key fob, and while holding it, press the “Unlock” button twice. The LED indicator light will blink four times to confirm that power-saving mode is enabled. When in power-saving mode, smart key and remote access functions are disabled. To deactivate power-saving mode, simply press any button on your key fob.
Tips to Prolong Battery Life
In addition to using power-saving mode, you can implement these simple tips to further extend your Lexus key fob battery life:
- Avoid Electronic Interference: Keep your key fob away from electronic devices that emit strong magnetic fields, such as televisions, laptops, smartphones, and battery chargers. These magnetic fields can inadvertently drain your key fob battery.
- Store Key Fob Properly: When not in use, store your key fob in a cool, dry place away from direct sunlight and extreme temperatures.
Enhance Your Lexus Key Fob
Beyond battery replacement, you can also personalize and protect your Lexus key fob with accessories. Consider purchasing a Lexus key glove, crafted from durable synthetic leather, designed to perfectly fit your key fob. These gloves offer protection against scratches, dents, and everyday wear and tear while adding a touch of style. Lexus key gloves are available in various colors, such as black or brown, with stitching accents and an embossed Lexus logo, allowing you to customize your key fob to your preference. Explore the wide selection of genuine Lexus accessories at Longo Lexus Accessories to find the perfect enhancements for your vehicle and key fob.
Get Quality Replacement Parts at Longo Lexus
For all your Lexus parts and service needs, trust Longo Lexus. Whether you require a new battery for your Lexus key fob or any other genuine Lexus replacement parts, Longo Lexus is committed to providing quality and reliable components that meet Lexus’ high standards. If you need assistance with part installation or any other Lexus service, don’t hesitate to contact the certified service team at 626-377-4814 or schedule a service appointment online. You can also visit our dealership in person at 3530 N. Peck Road in El Monte, California.
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