{"product_id":"dorman-904-421-nitrogen-oxide-nox-sensor-downstream","title":"Dorman 904-421 Nitrogen Oxide (NOx) Sensor - Downstream","description":"\u003ch2\u003eReliable Nitrogen Oxide Sensor for Chevrolet and GMC Vehicles\u003c\/h2\u003e\u003cp\u003eThe Dorman 904-421 Nitrogen Oxide (NOx) Sensor is designed specifically for select Chevrolet and GMC models, including Express, Savana, Sierra, and Silverado series. This sensor helps maintain proper emission control by accurately monitoring NOx levels, ensuring your vehicle meets environmental standards.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eColor: Silver with a plain finish for durability\u003c\/li\u003e\n\u003cli\u003eWiring harness length: 920 mm for precise fitment\u003c\/li\u003e\n\u003cli\u003eWire gauge measurement: 22 for optimal electrical performance\u003c\/li\u003e\n\u003cli\u003eConnector color: Black and silver with a rounded rectangle shape\u003c\/li\u003e\n\u003cli\u003eTerminal type: Pin with 6 terminals (male) and female connector\u003c\/li\u003e\n\u003cli\u003eSpecific fit designed for Chevrolet and GMC heavy-duty models\u003c\/li\u003e\n\u003cli\u003ePackage includes one sensor with module\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description of the Dorman 904-421 NOx Sensor\u003c\/h2\u003e\u003cp\u003eThis Dorman NOx sensor features a silver, plain finish housing that provides reliable operation under harsh engine conditions. The 920 mm wiring harness length and 22-gauge wire ensure proper connectivity and signal transmission. The sensor’s connector is a rounded rectangle shape in black and silver, equipped with six male pin terminals and a female connector, designed for a secure and precise fit. This sensor is engineered specifically for heavy-duty Chevrolet and GMC vehicles, including Express 2500\/3500, Savana 2500\/3500, Sierra 2500 HD\/3500 HD, and Silverado 2500 HD\/3500 HD models, ensuring compatibility and performance.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHelps maintain accurate NOx emissions readings for compliance with emission regulations\u003c\/li\u003e\n\u003cli\u003ePrevents engine warning lights related to emission sensor faults\u003c\/li\u003e\n\u003cli\u003eSupports proper functioning of the vehicle’s emission control system\u003c\/li\u003e\n\u003cli\u003eReduces risk of failed emissions tests due to faulty NOx sensor readings\u003c\/li\u003e\n\u003cli\u003eImproves engine performance by providing accurate exhaust gas data\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dorman 904-421 NOx sensor, ensure the wiring harness is routed without sharp bends or contact with hot engine components. Verify the connector securely mates with the vehicle’s harness to avoid signal interruptions. This sensor is a direct replacement designed for specific Chevrolet and GMC models, so no modifications are typically required. Consult the vehicle’s service manual for torque specifications and sensor location details.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures this NOx sensor to meet or exceed OEM specifications for fit, form, and function. While specific warranty details are not provided here, Dorman products generally come with a limited warranty covering defects in materials and workmanship. For exact warranty terms, refer to Dorman’s official documentation or contact the distributor.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52111223685301,"sku":"BKKY-904-421","price":284.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_904421_Ang.jpg?v=1775160513","url":"https:\/\/www.partcatalog.com\/products\/dorman-904-421-nitrogen-oxide-nox-sensor-downstream","provider":"PartCatalog","version":"1.0","type":"link"}