{"product_id":"ntk-25528-oxygen-sensor-upstream","title":"NTK 25528 Oxygen Sensor - Upstream","description":"\u003ch2\u003eDirect Fit Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eNTK 25528 is a specific-fit heated oxygen sensor built for direct replacement applications. It uses a threaded mounting design and a 4-wire configuration to match the original sensor layout on supported BMW applications.\u003c\/p\u003e\u003cp\u003eFits 1986-1987 BMW 735i, upstream. Fits 1987 BMW L6, upstream. Fits 1987 BMW L7, upstream. Fits 1986 BMW L7, upstream.\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 replacement use.\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type for OE-style installation.\u003c\/li\u003e\n\u003cli\u003e4-wire configuration with a 61.75-inch harness length.\u003c\/li\u003e\n\u003cli\u003e18 mm thread diameter.\u003c\/li\u003e\n\u003cli\u003eNTK 25528 is part of the Direct Fit Oxygen Sensor line.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eNTK 25528 is an emission control oxygen sensor engineered for supported BMW 735i, L6, and L7 applications. As a direct fit oxygen sensor, it is built to match the original sensor form and function, with a heated design, threaded mounting, and four-wire construction. The 61.75-inch harness length provides the needed reach for the listed upstream locations. NTK 25528 is also referenced by cross numbers including Bosch 13037 for the same application.\u003c\/p\u003e\u003cp\u003eNTK’s Direct Fit Oxygen Sensor line focuses on application-specific coverage and OE-style replacement fitment. NTK 25528 reflects that approach with a specific-fit design intended to simplify replacement on the listed BMW applications while maintaining the sensor characteristics expected for proper air\/fuel ratio feedback.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn upstream oxygen sensor.\u003c\/li\u003e\n\u003cli\u003eRestoring air\/fuel ratio feedback to the engine control system.\u003c\/li\u003e\n\u003cli\u003eAddressing oxygen sensor fault codes.\u003c\/li\u003e\n\u003cli\u003eCorrecting drivability issues tied to inaccurate exhaust gas readings.\u003c\/li\u003e\n\u003cli\u003eReplacing a sensor with damaged wiring or connector reach.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the vehicle’s sensor location, thread size, wire count, and harness length before installation. This part uses a threaded mounting type and a specific-fit configuration, so confirm the original sensor matches the listed application details. Follow the vehicle service procedure for removal and installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK states that its oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications. The brand is part of the NGK family of products and is recognized as a major original equipment oxygen sensor supplier.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731437248693,"sku":"BFPZ-25528","price":90.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_25528_Fro.jpg?v=1794296210","url":"https:\/\/www.partcatalog.com\/products\/ntk-25528-oxygen-sensor-upstream","provider":"PartCatalog","version":"1.0","type":"link"}