Can a Car Key Still Work After Being Washed in the Washing Machine?
3 Answers
If a car key has been washed in the washing machine, it can generally still be used. Additional Information: Precautions: When a car key has been accidentally washed in the washing machine, avoid shaking it forcefully, as this can spread the moisture inside the key and potentially increase the damage. Additionally, do not rush to press the buttons to check if it still works—testing the key while it is wet significantly raises the risk of malfunction, as the circuit chip inside may get damaged or burned. Car Key Functions: Car keys typically include features such as a car locator, the ability to close windows after turning off the engine, automatic trunk opening, remote window control, and the option to unlock only the driver's door.
I've been in auto repair for over a decade and often get asked whether washed keys still work. There are two types: purely mechanical and remote-controlled. Mechanical keys are usually fine after drying, but remote keys are trickier—they contain small circuit boards and batteries. The agitation and water from washing machines can cause short circuits or corrosion. My advice is to immediately remove the battery, wipe internal moisture with a soft cloth, then let it dry in a rice bag or cool place for at least 24 hours. After drying, test the buttons with fresh batteries. If they don't work, don’t bother further—the chip is likely damaged, requiring a replacement or reprogramming at a dealership. To avoid this, don’t leave keys in pockets (easy to forget), and always check pockets before laundry—it saves hassle.
Last week I accidentally threw my car keys into the washing machine with dirty clothes. When I took them out soaking wet, I was panicking. I quickly removed the casing to take out the battery, dried it with tissues, and left it on the balcony to dry for a day. Fortunately, it still worked after drying, though the remote sometimes responds slowly—I suspect some circuit damage. Since then, I've learned my lesson and now hang my keys on a dedicated hook. If you encounter a similar situation, don't rush to test them. Avoid powering them on until completely dry to prevent further damage. Some suggest using a hair dryer, but be cautious as hot air might melt the plastic—natural air drying is safer. Also, remember to keep a spare key for emergencies to avoid travel delays.
