{"product_id":"ntk-25641-oxygen-sensor","title":"NTK 25641 Oxygen Sensor","description":"\u003ch2\u003eDirect-Fit Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eNTK 25641 is a direct-fit heated oxygen sensor built for specific Audi applications. It uses a threaded mounting design and a 4-wire configuration to match OE-style service requirements for accurate exhaust feedback.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHeated oxygen sensor for faster operating response\u003c\/li\u003e\n\u003cli\u003eSpecific-fit design for direct application matching\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type for secure installation\u003c\/li\u003e\n\u003cli\u003e4-wire configuration with a 34.25-inch harness length\u003c\/li\u003e\n\u003cli\u003eNTK 25641 is engineered to meet or exceed OE specifications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eNTK 25641 is part of the Direct Fit Oxygen Sensor line, developed for import and domestic coverage with application-specific fitment. As an oxygen sensor for Audi RS6, Audi A8 Quattro, and Audi S8 applications, it supports precise exhaust monitoring in upstream and downstream positions listed in the fitment data. NTK 25641 combines a heated sensing element, threaded installation, and OE-style form to support consistent signal output and proper system operation. This part cross-references Bosch 16073 and DENSO Auto Parts 234-4812 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn or slow-responding oxygen sensor\u003c\/li\u003e\n\u003cli\u003eRestoring accurate air-fuel ratio feedback\u003c\/li\u003e\n\u003cli\u003eAddressing sensor fault codes related to exhaust monitoring\u003c\/li\u003e\n\u003cli\u003eCorrecting drivability issues tied to improper sensor output\u003c\/li\u003e\n\u003cli\u003eMaintaining OE-style emissions system performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the exact position and notes in the fitment table before installation. The sensor uses a threaded mount and a 4-wire harness, so connector routing and thread engagement should match the original layout. Confirm the application against the vehicle’s year, model, and sensor location before replacement.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK is part of the NGK family of products and is a major original equipment oxygen sensor supplier. Each sensor is extensively tested during manufacturing to help ensure quality and reliability that meet or exceed OE specifications.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731440197813,"sku":"BFPZ-25641","price":127.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_25641_Fro.jpg?v=1794296550","url":"https:\/\/www.partcatalog.com\/products\/ntk-25641-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}