{"product_id":"dorman-911-646-secondary-air-injection-check-valve","title":"Dorman 911-646 Secondary Air Injection Check Valve","description":"\u003ch2\u003eReliable Secondary Air Injection Check Valve for Lexus and Toyota\u003c\/h2\u003e\u003cp\u003eThe Dorman 911-646 Secondary Air Injection Check Valve is engineered to maintain optimal emission control in select Lexus and Toyota models. Crafted from durable cast aluminum with a diaphragm valve design, this component ensures consistent performance under varying conditions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from cast aluminum for strength and corrosion resistance\u003c\/li\u003e\n\u003cli\u003eBlack and silver finish for durability and visual inspection\u003c\/li\u003e\n\u003cli\u003eInlet size: 0.4 inches; outlet size: 0.47 inches for precise fitment\u003c\/li\u003e\n\u003cli\u003eMaximum pressure rating of 50 psi to handle emission system demands\u003c\/li\u003e\n\u003cli\u003eOperates effectively within a temperature range of -40°C to 125°C\u003c\/li\u003e\n\u003cli\u003eIncludes one secondary air injection check valve, hardware, and gaskets for installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDurable Design and Precise Fitment for Emission Control Systems\u003c\/h2\u003e\u003cp\u003eThe Dorman 911-646 check valve is designed specifically for the secondary air injection system, which helps reduce harmful emissions during engine startup. Its diaphragm valve type provides reliable one-way airflow, preventing exhaust gases from flowing back into the air injection system. The cast aluminum construction offers resistance to heat and corrosion, essential for the demanding environment under the hood. The valve’s inlet and outlet sizes (0.4 in and 0.47 in respectively) ensure compatibility with the air injection lines on Lexus and Toyota vehicles such as the 4Runner, GX470, Land Cruiser, LX470, Sequoia, and Tundra.\u003c\/p\u003e\u003ch2\u003eCompatible Lexus and Toyota Models\u003c\/h2\u003e\u003cp\u003eThis secondary air injection check valve is compatible with the following vehicles:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLexus GX470\u003c\/li\u003e\n\u003cli\u003eLexus LX470\u003c\/li\u003e\n\u003cli\u003eToyota 4Runner\u003c\/li\u003e\n\u003cli\u003eToyota Land Cruiser\u003c\/li\u003e\n\u003cli\u003eToyota Sequoia\u003c\/li\u003e\n\u003cli\u003eToyota Tundra\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by the Dorman 911-646 Check Valve\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents backflow of exhaust gases into the air injection system\u003c\/li\u003e\n\u003cli\u003eHelps maintain proper secondary air injection system pressure\u003c\/li\u003e\n\u003cli\u003eReduces risk of emission control system failure codes\u003c\/li\u003e\n\u003cli\u003eImproves cold start emission performance\u003c\/li\u003e\n\u003cli\u003ePrevents damage to air injection pump and related components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the engine is cool before installation to avoid injury\u003c\/li\u003e\n\u003cli\u003eUse the included hardware and gaskets for a secure, leak-free fit\u003c\/li\u003e\n\u003cli\u003eVerify inlet and outlet hose sizes match the valve specifications (0.4 in inlet, 0.47 in outlet)\u003c\/li\u003e\n\u003cli\u003eInspect surrounding components for wear or damage during replacement\u003c\/li\u003e\n\u003cli\u003eFollow vehicle-specific service manual instructions for removal and installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eDorman manufactures the 911-646 Secondary Air Injection Check Valve to meet or exceed OEM standards for fit, form, and function. The cast aluminum material and diaphragm valve design provide durability and reliable operation within the specified temperature and pressure ranges. This part is backed by Dorman’s limited warranty, ensuring coverage against defects in material and workmanship under normal use.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":44329603629237,"sku":"BKKY-911-646","price":109.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_911646_Ang.jpg?v=1775012114","url":"https:\/\/www.partcatalog.com\/products\/dorman-911-646-secondary-air-injection-check-valve","provider":"PartCatalog","version":"1.0","type":"link"}