{"product_id":"ntk-25658-oxygen-sensor-downstream","title":"NTK 25658 Oxygen Sensor - Downstream","description":"\u003ch2\u003eDirect Fit Oxygen Sensor Overview\u003c\/h2\u003e\u003cp\u003eThe NTK 25658 is a direct fit heated oxygen sensor built for specific downstream applications. It is engineered for BMW 325i, 325Ci, 330i, 330Ci, 525i, 530i, and X3 coverage where OE-style fit and signal performance are required.\u003c\/p\u003e\u003cp\u003eNTK 25658 uses a threaded mounting design, a 4-wire layout, and a 39.2500 wiring harness length for application-specific replacement. This part cross-references Bosch 15680 and 15681 for the same application.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect fit, specific application oxygen sensor\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 configuration\u003c\/li\u003e\n\u003cli\u003e39.2500 wiring harness length\u003c\/li\u003e\n\u003cli\u003e18.000 thread diameter\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment Details\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits 2003-2006 BMW 325Ci, downstream.\u003c\/li\u003e\n\u003cli\u003eFits 2003-2006 BMW 325Ci, downstream, cylinders 1-3 downstream oxygen sensor equivalent to OE design.\u003c\/li\u003e\n\u003cli\u003eFits 2004-2006 BMW 330Ci, downstream.\u003c\/li\u003e\n\u003cli\u003eFits 2004-2006 BMW 330Ci, downstream, cylinders 1-3 downstream oxygen sensor equivalent to OE design.\u003c\/li\u003e\n\u003cli\u003eFits 2004-2006 BMW X3, downstream.\u003c\/li\u003e\n\u003cli\u003eFits 2004-2006 BMW X3, downstream, cylinders 1-3 downstream oxygen sensor equivalent to OE design.\u003c\/li\u003e\n\u003cli\u003eFits 2003-2005 BMW 325i, downstream.\u003c\/li\u003e\n\u003cli\u003eFits 2003-2005 BMW 325i, downstream, cylinders 1-3 downstream oxygen sensor equivalent to OE design.\u003c\/li\u003e\n\u003cli\u003eFits 2004-2005 BMW 330i, downstream.\u003c\/li\u003e\n\u003cli\u003eFits 2004-2005 BMW 330i, downstream, cylinders 1-3 downstream oxygen sensor equivalent to OE design.\u003c\/li\u003e\n\u003cli\u003eFits 2004-2005 BMW 525i, downstream.\u003c\/li\u003e\n\u003cli\u003eFits 2004-2005 BMW 525i, downstream, cylinders 1-3 downstream oxygen sensor equivalent to OE design.\u003c\/li\u003e\n\u003cli\u003eFits 2004-2005 BMW 530i, downstream.\u003c\/li\u003e\n\u003cli\u003eFits 2004-2005 BMW 530i, downstream, cylinders 1-3 downstream oxygen sensor equivalent to OE design.\u003c\/li\u003e\n\u003cli\u003eFits 2003 BMW 325Ci, downstream, cylinders 4-6; B2S2; from 3\/03.\u003c\/li\u003e\n\u003cli\u003eFits 2003 BMW 325Ci, downstream, cylinders 1-3; B1S2; from 3\/03.\u003c\/li\u003e\n\u003cli\u003eFits 2003 BMW 325i, downstream, cylinders 4-6; B2S2; from 3\/03.\u003c\/li\u003e\n\u003cli\u003eFits 2003 BMW 325i, downstream, cylinders 1-3; B1S2; from 3\/03.\u003c\/li\u003e\n\u003cli\u003eFits 2003 BMW 330Ci, downstream, cylinders 4-6; B2S2; from 3\/03.\u003c\/li\u003e\n\u003cli\u003eFits 2003 BMW 330Ci, downstream, cylinders 1-3; B1S2; from 3\/03.\u003c\/li\u003e\n\u003cli\u003eFits 2003 BMW 330i, downstream, cylinders 4-6; B2S2; from 3\/03.\u003c\/li\u003e\n\u003cli\u003eFits 2003 BMW 330i, downstream, cylinders 1-3; B1S2; from 3\/03.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFaulty downstream oxygen sensor readings\u003c\/li\u003e\n\u003cli\u003eCheck engine light concerns related to sensor performance\u003c\/li\u003e\n\u003cli\u003eIncorrect air-fuel feedback after catalyst monitoring\u003c\/li\u003e\n\u003cli\u003eSlow sensor response from a worn heated sensor\u003c\/li\u003e\n\u003cli\u003eFitment issues from a non-specific replacement part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Quality\u003c\/h2\u003e\u003cp\u003eUse the vehicle’s exact engine-bank and sensor-position callout in the fitment notes before ordering. The threaded design and specific-fit configuration support OE-style replacement on the listed BMW applications.\u003c\/p\u003e\u003cp\u003eNTK is a major original equipment oxygen sensor supplier, and this 25658 sensor is extensively tested during manufacturing to meet or exceed OE specifications. The NTK 25658 is part of the Direct Fit Oxygen Sensor line, focused on application-specific coverage and OE-style fit, form, and function.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731440787637,"sku":"BFPZ-25658","price":110.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_25658_Fro.jpg?v=1794296618","url":"https:\/\/www.partcatalog.com\/products\/ntk-25658-oxygen-sensor-downstream","provider":"PartCatalog","version":"1.0","type":"link"}