{"id":122873,"date":"2024-12-04T08:16:30","date_gmt":"2024-12-04T16:16:30","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=122873"},"modified":"2025-04-02T00:18:48","modified_gmt":"2025-04-02T07:18:48","slug":"faqs-about-key-fob-battery-replacement-straight-answers","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/faqs-about-key-fob-battery-replacement-straight-answers\/","title":{"rendered":"FAQs About Key Fob Battery Replacement: Straight Answers"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column122873_b91d9f-ce > .kt-inside-inner-col,.kadence-column122873_b91d9f-ce > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column122873_b91d9f-ce > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column122873_b91d9f-ce > .kt-inside-inner-col{flex-direction:column;}.kadence-column122873_b91d9f-ce > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column122873_b91d9f-ce > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column122873_b91d9f-ce{position:relative;}@media all and (max-width: 1024px){.kadence-column122873_b91d9f-ce > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column122873_b91d9f-ce > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column122873_b91d9f-ce inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-37c0fb  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-a53cdf\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading122873_8854f4-58, .wp-block-kadence-advancedheading.kt-adv-heading122873_8854f4-58[data-kb-block=\"kb-adv-heading122873_8854f4-58\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading122873_8854f4-58 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading122873_8854f4-58[data-kb-block=\"kb-adv-heading122873_8854f4-58\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading122873_8854f4-58 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading122873_8854f4-58[data-kb-block=\"kb-adv-heading122873_8854f4-58\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading122873_8854f4-58 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading122873_8854f4-58\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Key fobs use RFID technology to communicate with the vehicle. These signals can unlock the doors and start the engine.<\/li>\n\n\n\n<li>A weak key fob battery can reduce the device&rsquo;s range and responsiveness. Sometimes, this issue might not be able to unlock the vehicle.<\/li>\n\n\n\n<li>Replacing a key fob battery involves carefully opening the key fob&rsquo;s casing, removing the old battery, and inserting a new one that&rsquo;s the same type. Consult your vehicle&rsquo;s owner&rsquo;s manual for specific instructions.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>A <a href=\"https:\/\/www.carparts.com\/key-fob\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"key fob\">key fob<\/a> is a small remote control that can unlock your vehicle&rsquo;s doors, open the trunk, and start the vehicle. This device might seem simple, but it&rsquo;s a little more complicated than your TV&rsquo;s remote control. In this article, we&rsquo;ll discuss what you should know when your <a href=\"https:\/\/www.carparts.com\/blog\/dead-key-fob-battery-symptoms-and-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"key fob runs out of battery\">key fob runs out of battery<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Does a Key Fob Work?<\/h2>\n\n\n\n<p>A modern key fob has a radio frequency identification (RFID) chip and an antenna inside. When pressed, the antenna transmits radio frequencies that the vehicle&rsquo;s reader device picks up.<\/p>\n\n\n\n<p>A key fob transmits specific RFID tag information that matches the vehicle&rsquo;s reader device. The reader device will only unlock the door if it receives the correct information, preventing other key fobs from unlocking the vehicle.<\/p>\n\n\n\n<p>The RFID key fobs can also be programmed to transmit different vehicle commands, like opening doors or starting the engine.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Happens When the Key Fob&rsquo;s Battery Is Low?<\/h2>\n\n\n\n<p>A key fob has a coil cell battery that can deplete over time, which will weaken the key fob&rsquo;s radio signals. When this happens, your vehicle might not pick up the signals right away.<\/p>\n\n\n\n<p>You might need to press the button several times before the vehicle locks or unlocks. Pressing the key fob when you&rsquo;re closer to your vehicle might help.<\/p>\n\n\n\n<p>When the key fob battery is low, you might not be able to unlock your vehicle, which is the system&rsquo;s major drawback. Fortunately, many key fobs come with an emergency blade, which is a traditional key hidden in the key fob.<\/p>\n\n\n\n<p>Some keys are hidden in the key fob like a switchblade, while others lie behind a plastic cover. Some automakers put the emergency blade inside the key fob assembly itself, and you&rsquo;ll need to pry the key open to access it.<\/p>\n\n\n\n\n\n\n<h2 class=\"wp-block-heading\">What To Do If My Key Fob Battery Dies?<\/h2>\n\n\n\n<p>Some vehicles have a start\/stop button instead of an ignition switch. They detect the key&rsquo;s presence using radio signals. However, a dead key fob won&rsquo;t be able to send these signals. You might be able to unlock your car with the emergency blade, but how do you start the vehicle?<\/p>\n\n\n\n<p>In this case, use the key fob to press the stop\/start button instead of your finger. Your vehicle can detect the magnetic transponder, starting the engine. Once you have your vehicle started, you should try to replace your vehicle&rsquo;s battery as soon as possible.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Long Do Key Fob Batteries Last?<\/h2>\n\n\n\n<p>The battery for a key fob is usually a CR2032 coin cell battery. However, it can vary depending on your vehicle&rsquo;s year, make, and model. This small battery can last around three to six years.<\/p>\n\n\n\n<p>Some owners have reported that their vehicle&rsquo;s <a href=\"https:\/\/www.carparts.com\/key-fob-battery\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"key fob battery\">key fob battery<\/a> has lasted decades, while others have complained that their key fob runs out of battery in a few months. These are typically outliers, as key fob batteries typically last years.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Change Battery In Key Fob?<\/h2>\n\n\n\n<p>Changing the key fob battery is simple. You don&rsquo;t need to go to your trusted mechanic or dealership. To access the battery in the key fob, you&rsquo;ll either need a flathead screwdriver or just a sharp fingernail. Some key fobs require a small phillips head screwdriver to open.<\/p>\n\n\n\n<p>Key fobs are opened by gently prying the plastic cover. Once opened, you&rsquo;ll either see the battery readily exposed or behind a circuit board. Some key fobs can be quite stubborn and require a bit of elbow grease or additional research to open without breaking the plastic casing.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Some require a little Phillips screwdriver, and some can be quite a pain to open&mdash;you may need to research online how to do it so you don&rsquo;t break the key fob.<\/p>\n<cite>&ndash;<a href=\"https:\/\/www.carparts.com\/blog\/author\/anthonyharlin\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Anthony Harlin, ASE Certified Master Automobile Technician\">Anthony Harlin, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<p>The place where you&rsquo;ll need to pry will vary depending on the key fob&rsquo;s design. Many key fobs have a small notch that you can pry. You can check your vehicle owner&rsquo;s manual for specific instructions on replacing the key fob battery.<\/p>\n\n\n\n<p>Remember to only use your key fob&rsquo;s prescribed battery. Putting in a stronger battery can damage the circuitry.<\/p>\n\n\n\n<p>It can be a good idea to have a spare battery inside your vehicle in case the key fob battery needs replacement. This can be quite useful, especially if you have a key fob that doesn&rsquo;t have an emergency blade. Regardless of whether your key has an emergency blade, it&rsquo;s best to replace the battery as soon as you notice weak key fob battery symptoms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get a Replacement Key Fob for Your Car<\/h2>\n\n\n\n<p>If replacing the battery doesn&rsquo;t fix a key fob&rsquo;s problems, it may be time to replace it. High-quality fobs don&rsquo;t have to be expensive. Head to <a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a> today and get the best deals on <a href=\"https:\/\/www.carparts.com\/key-fob\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"key fobs\">key fobs<\/a>.<\/p>\n\n\n\n<p>We know how important it is to get your orders delivered as fast as possible. We&rsquo;ll ship your order from the distribution center nearest you, so you can get back on the road in a matter of days.<\/p>\n\n\n\n<p>Shop and order a replacement key fob today!<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>A key fob is a small remote control that can unlock your vehicle&rsquo;s doors, open the trunk, and start the&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/faqs-about-key-fob-battery-replacement-straight-answers\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":123168,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[52,3744],"tags":[3619,3775],"ppma_author":[2607,3742],"class_list":{"0":"post-122873","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-ignition-system","9":"tag-key-fob","10":"tag-key-fob-battery","11":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>FAQs About Key Fob Battery Replacement: Straight Answers - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn how to identify whether your key fob has a low battery, why it\u2019s risky, and steps to replace the battery.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/faqs-about-key-fob-battery-replacement-straight-answers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"FAQs About Key Fob Battery Replacement: Straight Answers - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn how to identify whether your key fob has a low battery, why it\u2019s risky, and steps to replace the battery.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/faqs-about-key-fob-battery-replacement-straight-answers\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2024-12-04T16:16:30+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-04-02T07:18:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/key-fob-battery-replacement.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"994\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/faqs-about-key-fob-battery-replacement-straight-answers\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/faqs-about-key-fob-battery-replacement-straight-answers\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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