{"product_id":"walker-285-1004-nitrogen-oxide-nox-sensor-upstream","title":"Walker 285-1004 Nitrogen Oxide (NOx) Sensor - Upstream","description":"\u003ch2\u003eOE NOx Sensor for Diesel Emissions\u003c\/h2\u003e\u003cp\u003eWalker Genuine OE NOx Sensor 285-1004 is a specific-fit emission control sensor for selective catalytic reduction systems. It measures nitrogen oxide levels accurately so the aftertreatment system can manage emissions and protect related components.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGenuine OE line built to OE supplier standards\u003c\/li\u003e\n\u003cli\u003eSpecific-fit design with OE connectors and harness lengths\u003c\/li\u003e\n\u003cli\u003eOblong female connector with 6-pin terminal layout\u003c\/li\u003e\n\u003cli\u003eMetallic finish with black connector housing\u003c\/li\u003e\n\u003cli\u003eBuilt for harsh exhaust heat, vibration, and corrosion\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Walker NOx sensor is engineered for emission systems that rely on precise exhaust monitoring. Accurate NOx measurement supports SCR operation, helps maintain diesel particulate filter performance, and contributes to efficient engine operation. The 285-1004 is built as a plug-and-play replacement with OE-style electrical connection details for straightforward service.\u003c\/p\u003e\u003cp\u003eCompatible With 2017-2019 Chevrolet Silverado 2500 HD, Upstream; 2017-2019 Chevrolet Silverado 3500 HD, Upstream; 2017-2019 GMC Sierra 2500 HD, Upstream; 2017-2019 GMC Sierra 3500 HD, Upstream. This part number, 285-1004, is the correct reference for these applications and is also identified by 285-1004 in catalog listings.\u003c\/p\u003e\u003cp\u003eWalker Genuine OE is the brand line for OE-level emission components built around supplier-grade materials and manufacturing standards. For Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD diesel emission service, this line focuses on fit, electrical compatibility, and dependable sensor output.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFaulty NOx readings in the SCR system\u003c\/li\u003e\n\u003cli\u003eEmission warning lights tied to sensor failure\u003c\/li\u003e\n\u003cli\u003eReduced aftertreatment efficiency from inaccurate exhaust data\u003c\/li\u003e\n\u003cli\u003eStress on diesel particulate filter and related components\u003c\/li\u003e\n\u003cli\u003eService issues caused by damaged OE-style connectors or harness fit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eFits 2017-2019 Chevrolet Silverado 2500 HD, Upstream; 2017-2019 Chevrolet Silverado 3500 HD, Upstream; 2017-2019 GMC Sierra 2500 HD, Upstream; 2017-2019 GMC Sierra 3500 HD, Upstream. Verify connector shape, terminal count, and harness routing before installation. Use the OE connector and harness length match to confirm proper fitment for the intended application.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWalker Products states these Genuine OE NOx sensors are produced by Tier 1 OE suppliers using high-quality materials and precision manufacturing standards for demanding exhaust environments.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":53556090142901,"sku":"DKHD-285-1004","price":228.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/O2_2851004_FRO.jpg?v=1792393603","url":"https:\/\/www.partcatalog.com\/products\/walker-285-1004-nitrogen-oxide-nox-sensor-upstream","provider":"PartCatalog","version":"1.0","type":"link"}