{"product_id":"ntk-25711-oxygen-sensor-downstream","title":"NTK 25711 Oxygen Sensor - Downstream","description":"\u003ch2\u003eDirect-Fit Downstream Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eNTK Oxygen Sensor 25711 is a specific-fit, heated downstream sensor built for direct replacement service. It uses a threaded mounting design and a 4-wire configuration to match the original application requirements on select BMW models.\u003c\/p\u003e\u003cp\u003eAs part of NTK's Direct Fit Oxygen Sensor line, this unit is engineered for OE-style fit, form, and function. NTK 25711 is a practical choice for BMW i3, BMW M2, and BMW 640i applications where accurate downstream exhaust feedback is required.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit oxygen sensor for direct replacement service\u003c\/li\u003e\n\u003cli\u003eHeated sensor design for faster operating response\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type for OE-style installation\u003c\/li\u003e\n\u003cli\u003e4-wire construction for the listed application\u003c\/li\u003e\n\u003cli\u003e21.75-inch wiring harness length\u003c\/li\u003e\n\u003cli\u003e18 mm thread diameter\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eNTK 25711 is a downstream oxygen sensor designed for select BMW vehicles, including BMW i3, BMW M2, BMW M4, BMW X5, and related 3, 4, 5, and 6 Series applications listed in the fitment data. The direct-fit design follows the original equipment layout, helping maintain proper sensor placement and connector compatibility without universal adaptation. This part number, 25711, is part of NTK's Direct Fit Oxygen Sensor product line, which focuses on application-specific coverage for import and domestic vehicles.\u003c\/p\u003e\u003cp\u003eNTK manufactures oxygen sensors with ceramic expertise and extensive production testing to meet OE-level specifications. This sensor is intended for downstream exhaust monitoring on the listed BMW applications, including models such as the BMW 640i and BMW 335i, where the sensor location and configuration must match the factory setup. Part number 25711 also cross-references BMW OE numbers 11787645875 and 11787848487 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFault codes related to downstream oxygen sensor performance\u003c\/li\u003e\n\u003cli\u003eIncorrect air-fuel feedback from a worn sensor\u003c\/li\u003e\n\u003cli\u003eSlow sensor response caused by age or contamination\u003c\/li\u003e\n\u003cli\u003eExhaust monitoring issues on the listed BMW applications\u003c\/li\u003e\n\u003cli\u003eFitment problems from using a universal sensor instead of a direct-fit unit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Quality\u003c\/h2\u003e\u003cp\u003eVerify the vehicle's year, model, and downstream sensor location before installation. Match the threaded mounting style, wire count, and harness length to the original part. Use the fitment notes for application-specific details such as cylinder-bank references where listed.\u003c\/p\u003e\u003cp\u003eNTK states that these oxygen sensors are extensively tested during manufacturing to support quality and reliability that meet or exceed OE specifications.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731442196661,"sku":"BFPZ-25711","price":194.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_25711_Fro.jpg?v=1794296764","url":"https:\/\/www.partcatalog.com\/products\/ntk-25711-oxygen-sensor-downstream","provider":"PartCatalog","version":"1.0","type":"link"}