What to Do If Car Keys Accidentally Fall into Water?
3 Answers
Retrieve the keys from the water immediately, but avoid pressing any buttons on them right away. First, use clean paper towels to absorb the surface moisture, then separate the entire outer casing of the keys. Next, use a hair dryer on the cool setting to dry them out. Avoid using hot air as the internal circuit boards should not be exposed to excessive heat.
I once dropped my car key in water and immediately fished it out, wiping off the surface water with a dry cloth. The key is to open the back cover of the key to remove the battery, avoiding short circuits that could damage the circuit board. Find a small bag, fill it with raw rice or desiccant, and bury the key parts inside for two days to absorb moisture. During this time, don't press any buttons, as it might allow water to seep into the motherboard. After it's completely dry, reassemble the battery and test the functions. With some luck, the remote might still work. If it's completely unresponsive, the only option is to go to a 4S shop to get a new key, which can cost anywhere from a few hundred to over a thousand yuan. It's advisable to use a waterproof silicone case for the key or keep a spare key at home for emergencies.
Deal with the submerged car key immediately. First, retrieve it and dry the outer shell, then open the shell to remove the button battery to cut off the power. Use a soft brush to clean the water stains at the contact points to prevent oxidation. Find a sealed container filled with desiccant or cat litter, place the key inside, cover it tightly, and let it sit for 48 hours. Avoid using a hairdryer with hot air, as high temperatures can damage electronic components. Be extra cautious with smart keys, as moisture may cause sensor failure. After drying, reassemble the battery and test the remote and mechanical key functions. If some buttons malfunction, you can still seek a professional to repair the circuit board. Replacing the entire key assembly can be more expensive, especially for high-end versions with keyless entry functionality. Developing a habit of regularly checking spare keys is a safer practice.
