{"product_id":"standard-ignition-ks521-ignition-knock-detonation-sensor-rear","title":"Standard Ignition KS521 Ignition Knock (Detonation) Sensor - Rear","description":"\u003ch2\u003eIgnition Knock Sensor for Land Rover Applications\u003c\/h2\u003e\u003cp\u003eThe Standard Ignition KS521 is an ignition knock sensor built for select Land Rover vehicles with rear or N\/A mounting positions. It uses a 2-terminal, plug-in oval connector design with a bolt-mount attachment and metal\/plastic construction for direct replacement service.\u003c\/p\u003e\u003cp\u003eCompatible with Land Rover Defender 110, Discovery, Discovery Sport, Range Rover, Range Rover Velar, Range Rover Evoque, Range Rover Sport, Defender 90, and Defender 130 applications listed below.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStandard Ignition KS521 ignition knock (detonation) sensor\u003c\/li\u003e\n\u003cli\u003e2-terminal design with female connector and male blade terminals\u003c\/li\u003e\n\u003cli\u003eOval, plug-in connector for straightforward electrical connection\u003c\/li\u003e\n\u003cli\u003eBolt-mount attachment with snap-fit style retention\u003c\/li\u003e\n\u003cli\u003eMetal and plastic construction for underhood durability\u003c\/li\u003e\n\u003cli\u003eDirect-fit replacement for select Land Rover rear and N\/A positions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThe KS521 is an emission control sensor that monitors engine knock or detonation signals so the engine control system can respond appropriately. This part cross-references Land Rover OE applications through interchange numbers such as LR112513 and DKS265 for the same application. Standard Ignition KS521 is listed for 2020-2025 Land Rover Range Rover, 2021-2023 Land Rover Discovery, 2018-2023 Land Rover Range Rover Evoque, and other select Land Rover models shown in the fitment data.\u003c\/p\u003e\u003cp\u003eUse this sensor when servicing a Land Rover knock sensor circuit that requires a bolt-mounted, plug-in oval connector design. The part number KS521 is also a useful reference when verifying replacement selection across multiple Land Rover platforms.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eKnock sensor fault codes related to detonation monitoring\u003c\/li\u003e\n\u003cli\u003eEngine performance issues tied to inaccurate knock signal input\u003c\/li\u003e\n\u003cli\u003eIllumination of the check engine light from sensor circuit problems\u003c\/li\u003e\n\u003cli\u003eRough running caused by incorrect ignition timing response\u003c\/li\u003e\n\u003cli\u003eFailed emissions-related sensor diagnostics\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eConfirm the connector shape, terminal count, and mounting style before installation. This sensor uses a female connector, male blade terminals, and a bolt-mount attachment, so the existing harness and mounting point should match the OE configuration. Verify the vehicle position carefully, since fitment includes both rear and N\/A locations depending on model and year. The KS521 should be installed on the exact application listed in the fitment data for proper operation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eStandard Ignition supplies replacement electrical and engine management components for service applications, and the KS521 is cataloged to match the listed Land Rover fitments and interchange references.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFits 2024-2025 Land Rover Defender 110, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2021 Land Rover Defender 110, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2024-2025 Land Rover Discovery, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2025 Land Rover Discovery Sport, rear\u003c\/li\u003e\n\u003cli\u003eFits 2018-2023 Land Rover Discovery Sport, rear\u003c\/li\u003e\n\u003cli\u003eFits 2022-2025 Land Rover Range Rover, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2020 Land Rover Range Rover, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2024-2025 Land Rover Range Rover Velar, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2022-2023 Land Rover Defender 110, rear\u003c\/li\u003e\n\u003cli\u003eFits 2020 Land Rover Defender 110, rear\u003c\/li\u003e\n\u003cli\u003eFits 2023 Land Rover Defender 130, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2021-2023 Land Rover Defender 90, rear\u003c\/li\u003e\n\u003cli\u003eFits 2021-2023 Land Rover Discovery, rear\u003c\/li\u003e\n\u003cli\u003eFits 2018-2023 Land Rover Range Rover Evoque, rear\u003c\/li\u003e\n\u003cli\u003eFits 2018-2023 Land Rover Range Rover Velar, rear\u003c\/li\u003e\n\u003cli\u003eFits 2021-2022 Land Rover Range Rover Sport, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2021 Land Rover Range Rover, rear\u003c\/li\u003e\n\u003cli\u003eFits 2019-2020 Land Rover Range Rover Sport, rear\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Standard Ignition","offers":[{"title":"Default Title","offer_id":52820727169205,"sku":"FBHK-KS521","price":222.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/SI_KS521_Fro.jpg?v=1784524532","url":"https:\/\/www.partcatalog.com\/products\/standard-ignition-ks521-ignition-knock-detonation-sensor-rear","provider":"PartCatalog","version":"1.0","type":"link"}