{"product_id":"ntk-24339-air-fuel-ratio-sensor-upstream-left-or-upstream-right","title":"NTK 24339 Air \/ Fuel Ratio Sensor - Upstream Left or Upstream Right","description":"\u003ch2\u003eDirect-Fit Air\/Fuel Ratio Sensor\u003c\/h2\u003e\u003cp\u003eNTK 24339 is a specific-fit heated air\/fuel ratio sensor for Porsche applications that require OE-style sensor performance and connector fitment. It is built for direct replacement use where accurate upstream mixture feedback is critical.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit design for direct replacement applications\u003c\/li\u003e\n\u003cli\u003eHeated sensor construction for faster operating response\u003c\/li\u003e\n\u003cli\u003e5-wire configuration for air\/fuel ratio monitoring\u003c\/li\u003e\n\u003cli\u003e18 mm thread diameter with 0.38 thread length\u003c\/li\u003e\n\u003cli\u003e57.0 wiring harness length for application-specific routing\u003c\/li\u003e\n\u003cli\u003eNTK 24339 is engineered to match OE fit, form, and function\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eNTK 24339 is a direct-fit air\/fuel ratio sensor from NTK’s Direct Fit 5-Wire A\/F Sensor line. As part of NTK’s OE-focused sensor range, it is manufactured with ceramic expertise and tested during production to meet or exceed OE specifications. This sensor is used in Porsche upstream applications where precise exhaust feedback supports engine management calibration and emissions control. The part number 24339 is referenced for multiple Porsche fitments, including Porsche Panamera, Porsche Cayenne, Porsche 911, Porsche Boxster, and Porsche Cayman applications.\u003c\/p\u003e\u003cp\u003eThis part cross-references Bosch (e.g., 17154, 17156) for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn or slow-responding upstream air\/fuel ratio sensor\u003c\/li\u003e\n\u003cli\u003eAddressing mixture feedback faults that trigger check engine lights\u003c\/li\u003e\n\u003cli\u003eRestoring proper sensor response for emissions system monitoring\u003c\/li\u003e\n\u003cli\u003eCorrecting drivability issues tied to inaccurate exhaust oxygen feedback\u003c\/li\u003e\n\u003cli\u003eSupporting OE-style sensor communication in Porsche engine management systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the connector, wire count, thread size, and harness length before installation. Fitment includes Porsche upstream right and upstream left applications, so confirm the exact bank and sensor location for your vehicle. The sensor is specific fit, and the mounting bracket is not included. Use the vehicle’s service information to confirm the correct application for part number 24339 before installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK is a major OE oxygen sensor supplier with extensive manufacturing and testing controls. This sensor is produced to meet or exceed OE specifications for fit, form, and function.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731390881973,"sku":"BFPZ-24339","price":140.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_24339_Fro.jpg?v=1794295321","url":"https:\/\/www.partcatalog.com\/products\/ntk-24339-air-fuel-ratio-sensor-upstream-left-or-upstream-right","provider":"PartCatalog","version":"1.0","type":"link"}