{"product_id":"ntk-25686-air-fuel-ratio-sensor-upstream","title":"NTK 25686 Air \/ Fuel Ratio Sensor - Upstream","description":"\u003ch2\u003eDirect-Fit Air\/Fuel Sensor\u003c\/h2\u003e\u003cp\u003eThe NTK 25686 is a specific-fit heated air\/fuel ratio sensor for select Mazda applications. It is built as a direct-fit 4-wire sensor with OE-style form and function for accurate exhaust feedback.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit design for straightforward replacement.\u003c\/li\u003e\n\u003cli\u003eHeated sensor construction for faster operating readiness.\u003c\/li\u003e\n\u003cli\u003e4-wire configuration for the correct electrical setup.\u003c\/li\u003e\n\u003cli\u003e18 mm thread diameter with 0.38 thread length.\u003c\/li\u003e\n\u003cli\u003eNTK 25686 is engineered for OE-equivalent fit and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment and Application\u003c\/h2\u003e\u003cp\u003eFits 2006-2008 Mazda 6, upstream. This application is listed as front sensor, located in the manifold, B1S1, California emissions, with OE-equivalent design. The NTK 25686 is a direct-fit solution for Mazda 6 models that require this specific upstream air\/fuel ratio sensor.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIncorrect air\/fuel feedback readings.\u003c\/li\u003e\n\u003cli\u003eCheck engine lights related to sensor performance.\u003c\/li\u003e\n\u003cli\u003eRough idle or drivability issues tied to exhaust mixture control.\u003c\/li\u003e\n\u003cli\u003eEmissions concerns on California-emissions applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the upstream mounting location, manifold placement, B1S1 designation, and 4-wire connector match the original sensor before installation. The sensor is specific fit, so confirm thread size and harness length against the removed part. No mounting bracket is included.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK is a major original equipment oxygen sensor supplier and tests sensors during manufacturing to meet or exceed OE specifications. Part number 25686 reflects NTK's OE-focused design and application coverage.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53260847743157,"sku":"BFPZ-25686","price":282.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_25686_Fro.jpg?v=1789276968","url":"https:\/\/www.partcatalog.com\/products\/ntk-25686-air-fuel-ratio-sensor-upstream","provider":"PartCatalog","version":"1.0","type":"link"}