Is your Hyundai Elantra key fob not working as reliably as it used to? You might be facing a common issue: a dead or dying key fob battery. Fortunately, replacing the battery in your Hyundai Elantra key fob is a straightforward process that you can easily do yourself. This guide will walk you through understanding your key fob and changing its battery.
Understanding Your Hyundai Elantra Key Fob and Alarm System
It’s helpful to understand how your Hyundai Elantra’s alarm system interacts with your key fob. According to the owner’s manual, the alarm system is designed to activate in specific situations when the car is parked and armed. These situations include:
- Opening a front or rear door without using the key fob transmitter or the ignition key.
- Opening the trunk lid or tailgate without using the transmitter or the ignition key.
- Opening the hood of your Hyundai Elantra.
When triggered, the alarm will sound a siren and flash the turn signal lights for about 30 seconds, repeating up to three times. You can disarm the system by using either your key fob transmitter or the ignition key to unlock the door or trunk.
The original text suggests that using the ignition key in the door lock should disarm the alarm, and starting the car with the ignition key will also likely silence any alarm sounding. This is a useful tip if your key fob battery is completely dead and you need to access your vehicle.
Step-by-Step Guide to Replacing Your Hyundai Elantra Key Fob Battery
When you notice your Hyundai Elantra key fob becoming less responsive – perhaps requiring multiple button presses to lock or unlock your doors, or the indicator LED failing to light up – it’s a clear sign the battery is weakening. Prompt battery replacement is recommended to avoid being locked out or struggling to operate your vehicle’s remote functions.
The battery type you’ll need is a CR2032. Here’s how to replace it:
- Open the Key Fob Casing: Carefully separate the two halves of the key fob case. You can use a blade screwdriver, as shown in the image below, to gently pry open the case at the designated seam.
- Remove the Old Battery: Once the case is open, you’ll see the battery. Take note of the battery’s polarity (+ side facing down) before removing it. Gently take out the old CR2032 battery.
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Insert the New Battery: Place the new CR2032 battery into the key fob, ensuring the polarity is correct (positive side down, matching the orientation of the old battery).
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Close the Key Fob Casing: Carefully snap the two halves of the key fob case back together until they are securely closed.
Important Note: Unlike some other car brands, such as Audi, you will not need to reprogram your Hyundai Elantra key fob after replacing the battery. Once the new battery is in place, your key fob should function immediately.
Replacing the battery in your Hyundai Elantra key fob is a simple maintenance task that can save you from potential frustration and inconvenience. By following these steps, you can ensure your key fob remains functional and your vehicle remains secure.
