What to Do If a BMW Car Key Gets Washed in the Washing Machine?
2 Answers
Use a dry cloth or paper towel to wipe the surface clean. If you have previously replaced the battery, you must have opened the key's casing. Use a hairdryer on the cool setting to dry it out. Never use hot air, as the circuit board inside the key should not be overheated. You can buy a bottle of high-concentration alcohol from a pharmacy.
My BMW key also went through a washing machine adventure, which was really scary! I immediately fished the key out of the washing tub, opened the casing, and carefully removed the battery to prevent a short circuit. Then, I wiped the surface water off with a dry cloth and placed it in a bag of rice for over 24 hours to absorb moisture—an old but effective trick. After drying, I tested if the buttons were responsive. If the light turns on but the functions don’t work, it might mean internal circuit damage. Mine still worked, but to be safe, I drove to the BMW dealership for a check-up. They said washing could damage the chip. I recommend using a waterproof key pouch for daily protection—acting fast can save you the cost of replacing the key.