Accidents happen, and sometimes our car keys end up in the washing machine. If you’ve mistakenly put your Hyundai smart key fob through a laundry cycle and found that the buttons are no longer working, don’t panic. Before assuming you need a costly replacement, there’s a good chance you can revive it yourself. This guide will walk you through how to open your Hyundai key fob and dry it out, potentially saving you time and money.
Step-by-Step Guide to Opening Your Hyundai Key Fob
The owner’s manual might suggest using a “slim tool or utility blade” to open the key fob. However, this method can be a bit vague and potentially damaging if not done correctly. A more effective and easier approach involves using the emergency key that is typically housed within the fob itself.
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Locate the Emergency Key: On most Hyundai key fobs, you’ll find a small release button or latch. Press and hold this while simultaneously pulling out the mechanical emergency key.
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Use the Emergency Key for Leverage: Once the emergency key is removed, you’ll notice a small slot or opening where the key was housed. This is where you’ll use the emergency key to gently pry open the fob.
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Carefully Pry Open the Fob: Insert the tip of the emergency key into the slot. Gently twist or lever the key to separate the two halves of the key fob. You should feel a slight give, and the casing should begin to split open. Avoid using excessive force, as you don’t want to damage the plastic housing. Work your way around the seam if necessary until the fob is open.
Drying and Cleaning the Key Fob Internals
Once you have successfully opened your Hyundai key fob, you’ll likely find moisture inside. Here’s how to proceed with drying and cleaning the internal components:
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Disassemble the Fob: Carefully separate the two halves of the fob. You’ll see the circuit board, battery, and likely rubber gaskets. Gently remove these components. Take note of how they are positioned for reassembly later.
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Inspect for Water Damage: Check all parts for visible water and corrosion. A battery tester can be useful to check if the battery voltage is still within the normal range (typically around 3V). A low voltage reading might indicate a need for battery replacement.
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Initial Air Drying: Allow all the components to air dry for a few hours. This will help to evaporate most of the water.
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Isopropyl Alcohol Rinse (Recommended): For more thorough drying and to prevent corrosion, submerge the circuit board and rubber gaskets in 90% or higher isopropyl alcohol. Isopropyl alcohol is excellent for displacing water and evaporates quickly, minimizing the risk of damage to electronic components.
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Gentle Drying with Compressed Air (Optional): If you have compressed air, you can gently blow air over all parts to expedite the drying process. Ensure the air pressure is low to avoid damaging delicate components.
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Extended Drying Time: Allow all parts to dry completely for at least a couple of days before reassembling. This ensures that all moisture is gone, reducing the chance of short circuits or corrosion.
Reassembling and Testing Your Hyundai Key Fob
After ensuring all components are completely dry, it’s time to put your Hyundai key fob back together:
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Replace the Battery (If Necessary): If your battery tested low or if it’s been a while since you replaced it, now is a good time to install a new battery of the correct type.
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Reassemble the Fob: Carefully put all the components back in their original positions within the key fob casing. Make sure the gaskets are properly seated to maintain some level of water resistance in the future.
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Snap the Casing Back Together: Align the two halves of the key fob casing and gently press them together until they snap securely shut.
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Test the Key Fob: Try using all the buttons on your key fob to see if they are now functioning correctly. Also, test starting your Hyundai to ensure the immobilizer and remote start (if equipped) are working.
By following these steps, you have a high chance of successfully reviving your Hyundai key fob after its unexpected laundry adventure. While this method is often effective, remember that water damage can sometimes be severe. If your key fob still doesn’t work after trying this, you may need to consult with a Hyundai dealership or a professional automotive locksmith for further assistance. Hopefully, this guide helps you get your key fob working again and saves you from the hassle and expense of a replacement.
