{"product_id":"ntk-25558-oxygen-sensor-upstream","title":"NTK 25558 Oxygen Sensor - Upstream","description":"\u003ch2\u003eDirect Fit Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eNTK oxygen sensor 25558 is a direct-fit, heated sensor built for specific applications. It is engineered for threaded installation and uses a 4-wire design with a 26.25-inch harness for proper routing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated oxygen sensor for faster operating response.\u003c\/li\u003e\n\u003cli\u003eSpecific-fit design for accurate replacement.\u003c\/li\u003e\n\u003cli\u003eThreaded mounting with 18 mm thread diameter.\u003c\/li\u003e\n\u003cli\u003e26.25-inch wiring harness for application-specific reach.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment Details\u003c\/h2\u003e\u003cp\u003eFits 1995 Volkswagen Passat, upstream. This part cross-references Bosch 13584 for the same application.\u003c\/p\u003e\u003cp\u003eNTK 25558 is part of the Direct Fit Oxygen Sensor line, which focuses on application-specific coverage and OE-style replacement fitment. NTK draws on ceramic sensor manufacturing expertise and OE application technology to deliver a sensor that matches the intended form and function for the vehicle.\u003c\/p\u003e\u003ch2\u003eCommon Replacement Issues\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCheck engine light related to oxygen sensor performance.\u003c\/li\u003e\n\u003cli\u003eIncorrect air-fuel mixture readings.\u003c\/li\u003e\n\u003cli\u003eSlow sensor response during closed-loop operation.\u003c\/li\u003e\n\u003cli\u003eFailed emissions testing caused by a worn sensor.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eUse the threaded mounting style and harness length to confirm routing before installation. Verify the upstream location and chassis break note for the Volkswagen Passat application, and match the connector and wire count to the original sensor.\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 and is recognized as a major original equipment oxygen sensor supplier.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731438166197,"sku":"BFPZ-25558","price":93.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_25558_Fro.jpg?v=1794296319","url":"https:\/\/www.partcatalog.com\/products\/ntk-25558-oxygen-sensor-upstream","provider":"PartCatalog","version":"1.0","type":"link"}