{"product_id":"walker-285-1003-nitrogen-oxide-nox-sensor-downstream","title":"Walker 285-1003 Nitrogen Oxide (NOx) Sensor - Downstream","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eWalker Genuine OE NOx Sensor 285-1003 is a specific-fit emission sensor for diesel aftertreatment systems. It is built for accurate nitrogen oxide monitoring in SCR-equipped applications and uses OE-style connectors and harness lengths for a direct replacement experience.\u003c\/p\u003e\u003cp\u003eCompatible with Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD applications listed below, this sensor supports proper emissions control and system efficiency. Part number 285-1003 is also identified as a Genuine OE replacement from Walker.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit NOx sensor for emission control systems\u003c\/li\u003e\n\u003cli\u003eOE-style connector and harness length for plug-and-play installation\u003c\/li\u003e\n\u003cli\u003eBuilt with Tier 1 OE supplier manufacturing standards\u003c\/li\u003e\n\u003cli\u003eDesigned for SCR system monitoring and accurate NOx measurement\u003c\/li\u003e\n\u003cli\u003eGray connector, oblong shape, female connector with 6-pin terminal layout\u003c\/li\u003e\n\u003cli\u003eMatte finish with multi-colored sensor construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eWalker Products Genuine OE NOx Sensor 285-1003 is engineered for downstream emission monitoring in SCR systems. Accurate NOx measurement helps the aftertreatment system manage emissions correctly, protect components such as diesel particulate filters, and maintain efficient engine operation. The Genuine OE line focuses on OE-level materials, precision manufacturing, and fitment consistency for service replacement work.\u003c\/p\u003e\u003cp\u003eThis part fits 2017-2019 Chevrolet Silverado 2500 HD, downstream; 2017-2019 Chevrolet Silverado 3500 HD, downstream; 2017-2019 GMC Sierra 2500 HD, downstream; and 2017-2019 GMC Sierra 3500 HD, downstream. Part number 285-1003 is a direct reference for ordering and catalog matching.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFault codes related to NOx sensor performance\u003c\/li\u003e\n\u003cli\u003eIncorrect nitrogen oxide readings in the exhaust stream\u003c\/li\u003e\n\u003cli\u003eSCR system monitoring issues\u003c\/li\u003e\n\u003cli\u003eEmission control problems that can affect DPF protection\u003c\/li\u003e\n\u003cli\u003eReduced efficiency from a failing downstream sensor\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eUse the vehicle-specific connector and harness layout to match the original sensor configuration. Confirm downstream placement and connector style before installation. Because this is a specific-fit sensor, verify the application by year, make, model, and position before ordering.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWalker states that the Genuine OE line is produced by Tier 1 OE suppliers using the same materials, standards, and precision technology associated with leading vehicle manufacturers. The sensor is built for demanding exhaust environments with heat, vibration, and corrosion exposure.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":53588247904437,"sku":"DKHD-285-1003","price":205.23,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/O2_2851003_FRO.jpg?v=1792737564","url":"https:\/\/www.partcatalog.com\/products\/walker-285-1003-nitrogen-oxide-nox-sensor-downstream","provider":"PartCatalog","version":"1.0","type":"link"}