{"product_id":"ntk-25174-oxygen-sensor-downstream-or-downstream-right","title":"NTK 25174 Oxygen Sensor - Downstream or Downstream Right","description":"\u003ch2\u003eDirect Fit Oxygen Sensor for Audi\u003c\/h2\u003e\u003cp\u003eThe NTK 25174 is a direct fit oxygen sensor built for specific Audi applications that require a heated, threaded sensor with a 4-wire design. It is engineered for accurate exhaust monitoring and OE-style fit, form, and function.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit oxygen sensor for targeted applications\u003c\/li\u003e\n\u003cli\u003eHeated sensor design for responsive exhaust feedback\u003c\/li\u003e\n\u003cli\u003e4-wire configuration for proper signal and heater circuit operation\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type for direct replacement installation\u003c\/li\u003e\n\u003cli\u003e38.2500 wiring harness length for application-specific routing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment and Application Details\u003c\/h2\u003e\u003cp\u003eFits 2010-2011 Audi A6, downstream. Fits 2009 Audi A6 Quattro, downstream right. Fits 2006 Audi A4, downstream right. Fits 2006 Audi A4 Quattro, downstream right. Fits 2005 Audi A4 Quattro, downstream right. This part cross-references BBB Industries 13944 and Interchanges 06E906265E for the same application.\u003c\/p\u003e\u003cp\u003eNTK positions this oxygen sensor line as a direct fit solution backed by extensive manufacturing tests and OE application coverage. The 25174 is part of NTK's broader sensor program, which focuses on streamlined coverage for import and domestic vehicles while maintaining OE-level fit and function. For Audi A4 and Audi A6 applications, the 25174 supports accurate replacement when the original sensor has aged, failed, or triggered drivability concerns.\u003c\/p\u003e\u003ch2\u003eCommon Replacement Reasons\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCheck engine light related to oxygen sensor performance\u003c\/li\u003e\n\u003cli\u003eIncorrect air-fuel ratio readings\u003c\/li\u003e\n\u003cli\u003eReduced fuel economy from a failing sensor\u003c\/li\u003e\n\u003cli\u003eSlow sensor response or heater circuit faults\u003c\/li\u003e\n\u003cli\u003eEmissions test failures tied to exhaust monitoring issues\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the connector, harness length, thread diameter, and downstream position before installation. Confirm chassis breakpoints and engine-specific notes listed in the fitment data for Audi A4, Audi A4 Quattro, Audi A6, and Audi A6 Quattro applications. Use the vehicle's service information to match the sensor location and routing requirements.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK states that its oxygen sensors are extensively tested during manufacturing 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":53260847382709,"sku":"BFPZ-25174","price":193.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_25174_Fro.jpg?v=1789276888","url":"https:\/\/www.partcatalog.com\/products\/ntk-25174-oxygen-sensor-downstream-or-downstream-right","provider":"PartCatalog","version":"1.0","type":"link"}