The remote keyless system and the central locking system in Optima require the 12 volt battery to be in healthy state to function properly. If the key fob still doesn’t work after cleaning and drying, the chip is probably fried and you will have to buy a new key. In case of exposure to salt water, or soapy or dirty water, it is recommended to clean the chip with isopropyl alcohol or electronic cleaner. If your Optima key fob stopping working after exposure to clean tap water or rain, immediately remove the battery and clean the electronic component with paper towel and let it dry fully before putting back the battery. Exposure to excessive water increases the risk of water damage, so you shouldn’t make this a habit. If your Optima key fob survived a wash cycle, or a deep bath in the ocean or pool water, it doesn’t make the key fob waterproof, it means you got lucky. Submerging the key in ocean water at the beach can be much more damaging to key fob electronics due to highly conductive nature of salt water. A splash of water or brief exposure to light rain should be fine, but exposure to excessive amount of water like submerging the key in the pool can cause the water to penetrate the seals and damage the chip. Your Optima key has rubber seals which prevents the water from getting to the electronic chip inside. If your Kia Optima key fob has taken a bath in the soapy water of the washing machine after you forgot to take it out of your pants pocket, water damage is very likely. Also make sure all the battery contacts are corrosion and dust free. Make sure the battery is firmly placed and does not move around when you shake the remote. If the clips don’t have any tension, it can cause contact issues and the remote may not receive any power. The battery inside the key fob of Optima has metal retaining clips that hold the battery in position and completes the circuit. This is assuming the new battery you installed is healthy and its use by date is many years away. To learn more about how and for what purposes Amazon uses personal information (such as Amazon Store order history), please visit our Privacy Notice.Depending on how often you use the key fob or remote control of your Optima, the battery should last between two and four years. You can change your choices at any time by visiting Cookie Preferences, as described in the Cookie Notice. Click ‘Continue without accepting’ or ‘Customise Cookies’ to decline these cookies, make more detailed choices or learn more. Third parties use cookies for the purposes of displaying and measuring personalised advertisements, generating audience insights, and developing and improving products. This includes using first- and third-party cookies which store or access standard device information such as a unique identifier. If you agree, we will also use cookies to complement your shopping experience across Amazon stores as described in our Cookie Notice. We also use these cookies to understand how customers use our services (for example, by measuring site visits) so we can make improvements. We use cookies and similar tools that are necessary to enable you to make purchases, to enhance your shopping experiences, and to provide our services, as detailed in our Cookie Notice.
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