Your car key fob is an essential part of modern vehicle security and convenience, but it is also highly sensitive to water damage. Whether you’ve dropped your keys in a puddle, spilled a drink on them, or accidentally sent them through the washing machine, exposure to moisture can cause your key fob to stop working. In this blog, we’ll explain how water damages key fobs, the signs of a failing fob, and what you can do to prevent and fix water-related issues.
How Water Damages a Car Key Fob
Car key fobs contain delicate electronic circuits that are not designed to handle moisture. When water seeps inside, it can cause:
- Short-Circuiting – Water can create unintended electrical connections between circuits, leading to malfunctions.
- Corrosion – Over time, moisture can corrode the internal components, making the fob unresponsive.
- Battery Failure – Water exposure can cause the battery contacts to corrode, preventing proper power delivery.
- Chip Damage – The transponder chip inside the fob may stop working if exposed to excessive moisture.
Signs Your Key Fob Has Water Damage
If your key fob has been exposed to water, you may notice:
- Unresponsive Buttons – The remote locking and unlocking functions may stop working.
- Inconsistent Performance – The key may only work intermittently or require multiple button presses.
- Failure to Start the Car – If the transponder chip is damaged, the car may not recognise the key fob.
- Visible Corrosion – If you open the key fob, you may see rust or greenish residue on the circuit board.
What to Do If Your Key Fob Gets Wet
If your key fob has been exposed to water, act quickly to minimise damage:
- Remove the Battery – Open the fob and take out the battery to prevent further short-circuiting.
- Dry the Key Fob – Use a dry cloth and, if necessary, leave it in a warm, dry place for 24-48 hours.
- Avoid Using Heat Sources – Do not use a hairdryer or microwave, as excessive heat can damage the electronics.
- Clean the Contacts – If there is minor corrosion, gently clean the battery contacts with rubbing alcohol and a cotton swab.
- Try a New Battery – Once the fob is completely dry, insert a new battery and test if it works.
When to Call a Professional Auto Locksmith
If your key fob still isn’t working after drying and replacing the battery, it may require professional repair or replacement. At 247 Auto Locksmith, we offer:
- Key Fob Repairs – We can diagnose and fix minor water damage where possible.
- Key Fob Replacement – If the damage is severe, we can supply and program a new key fob for your vehicle.
- Transponder Reprogramming – If your car isn’t recognising your key, we can reprogram a new transponder chip.
How to Prevent Water Damage to Your Car Key Fob
To avoid the hassle of a water-damaged key fob, follow these simple tips:
- Use a Protective Case – A waterproof key cover can prevent moisture from seeping in.
- Keep Keys in a Safe Place – Avoid leaving them in pockets where they may end up in the wash.
- Have a Spare Key – Always have a backup key in case of emergencies.
Need a Replacement or Repair? Contact Us Today!
If your car key fob has suffered water damage and needs repair or replacement, 247 Auto Locksmith is here to help. We provide fast, mobile key replacement and programming services across Surrey, Sussex, South London, and Kent. Call us now at 07921365247 for expert assistance and get back on the road without delay!