{"product_id":"keylessoption-nissan-key-fob-replacement-kr5txn4-5-button-1-pack-for-altima-versa-sentra-2019-2023-battery-included","title":"KeylessOption Nissan Key Fob Replacement KR5TXN4 — 5-Button 1‑Pack for Altima\/Versa\/Sentra (2019–2023), Battery Included","description":"\u003cp\u003e\u003cstrong\u003eThis KeylessOption key fob is a complete 5-button replacement compatible with Nissan Altima, Versa, and Sentra (2019–2023) using OEM code KR5TXN4 and requires dealer or locksmith programming.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you lost or damaged your factory remote, this aftermarket KeylessOption unit provides the same button layout and built-in electronics, including a battery, so it’s ready for programming as soon as the metal key blade is cut to match your car. It’s sold as a single-pack and matches the OEM frequency and signal format, but note that professional programming is necessary to sync the fob with your vehicle’s immobilizer and keyless entry system.\u003c\/p\u003e\n\n\u003ch3\u003eWill this fob work with my Nissan model and year?\u003c\/h3\u003e\n\u003cp\u003eThis fob is designed for Nissan Altima, Versa, and Sentra models from 2019 through 2023 that originally use the KR5TXN4 remote. It follows the OEM electrical specifications and button layout to ensure compatibility with the vehicle’s keyless entry functions. Always verify your existing remote’s part number before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible models: Altima, Versa, Sentra (2019, 2020, 2021, 2022, 2023)\u003c\/li\u003e\n  \u003cli\u003eOEM reference: KR5TXN4 frequency and signal format\u003c\/li\u003e\n  \u003cli\u003eCheck original fob part number to confirm match\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the box and what needs to be done before programming?\u003c\/h3\u003e\n\u003cp\u003eThe package contains a fully assembled KeylessOption key fob with built-in electronics and a pre-installed battery. The metal key insert is uncut; you must have the blade cut to match your car’s ignition\/door locks before a dealer or locksmith can program the remote. No additional internal components are required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncluded: complete fob, electronics, and battery\u003c\/li\u003e\n  \u003cli\u003eNot included: cut key blade — have a locksmith or dealer cut it\u003c\/li\u003e\n  \u003cli\u003eAfter cutting, professional programming at dealer or locksmith required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow is programming handled and why is a dealer or locksmith required?\u003c\/h3\u003e\n\u003cp\u003eModern Nissan remotes pair with vehicle immobilizer systems and often require secure access to the car’s computer to register the new transmitter. Dealers and certified locksmiths have the diagnostic tools and security credentials to add a new key fob without affecting existing keys. Attempting DIY programming without the proper tools may not work and could lock the vehicle’s system.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProgramming must be performed by dealer or locksmith\u003c\/li\u003e\n  \u003cli\u003eThey use OEM scan tools to register the KR5TXN4 transmitter ID\u003c\/li\u003e\n  \u003cli\u003eProfessional service preserves existing keys and security features\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect for fit, function, and long-term use?\u003c\/h3\u003e\n\u003cp\u003eThis aftermarket remote mirrors the original fob’s button positions and provides standard keyless entry functions like lock, unlock, trunk release, panic, and remote start where supported. Because the electronics match OEM signaling, you’ll retain normal range and responsiveness once programmed. Keep a spare battery on hand and protect the fob from prolonged moisture or impact to extend its lifespan.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eButtons included: lock, unlock, trunk, panic, remote start (5-button layout)\u003c\/li\u003e\n  \u003cli\u003eBattery pre-installed; replace as needed with standard CR-type battery\u003c\/li\u003e\n  \u003cli\u003eAftermarket housing built for OEM-like fit and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers of 2019–2023 Nissan Altima, Versa, or Sentra who need a direct-fit replacement remote (OEM KR5TXN4) and are prepared to have a dealer or locksmith cut the key blade and program the unit. It’s ideal if you want a complete, ready-to-program remote with electronics and battery included, sold as a single pack for quick replacement.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need a dealer to program this KeylessOption fob?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This KR5TXN4 fob must be programmed by a dealer or certified locksmith with OEM diagnostic tools.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the metal key blade included and ready to use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A metal blade is included but uncut; have a locksmith or dealer cut it to your vehicle’s key profile.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"KeylessOption","offers":[{"title":"Default Title","offer_id":48085259583646,"sku":"B09K7YY48J","price":40.78,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/keylessoption-fob-front-view_e04c287b-6098-47be-ba41-6b57a009da2b.jpg?v=1785868409","url":"https:\/\/northtrailauto.ca\/products\/keylessoption-nissan-key-fob-replacement-kr5txn4-5-button-1-pack-for-altima-versa-sentra-2019-2023-battery-included","provider":"North Trail Auto","version":"1.0","type":"link"}