{"product_id":"ntk-25201-oxygen-sensor","title":"NTK 25201 Oxygen Sensor - Downstream","description":"\u003ch2\u003eOverview of NTK Direct Fit Oxygen Sensor 25201\u003c\/h2\u003e\u003cp\u003eThe NTK Direct Fit Oxygen Sensor 25201 is engineered specifically for Hyundai and Kia vehicles, including the Optima and Sonata models. This heated oxygen sensor ensures precise monitoring of exhaust gases to optimize engine performance and emissions control.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated sensor type for faster response times\u003c\/li\u003e\n\u003cli\u003eSpecific fit for Hyundai Optima and Kia Sonata\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type with 18mm thread diameter\u003c\/li\u003e\n\u003cli\u003eFour-wire configuration for accurate signal transmission\u003c\/li\u003e\n\u003cli\u003e20.5-inch wiring harness length for direct installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFeatures of the Direct Fit Oxygen Sensor Line\u003c\/h2\u003e\u003cp\u003eThe NTK Direct Fit Oxygen Sensor product line is designed to provide exact replacement sensors that match OEM specifications. This line focuses on direct fitment, eliminating the need for modifications or additional adapters. The 25201 sensor maintains factory-level performance and durability, ensuring compatibility with the vehicle’s emission control system.\u003c\/p\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThis NTK oxygen sensor features a heated element that allows the sensor to reach operating temperature quickly, improving fuel efficiency and reducing emissions sooner after engine start. The sensor’s four-wire design supports both the heating element and signal output, ensuring reliable data transmission to the engine control unit. With a threaded mounting type and an 18mm thread diameter, installation is straightforward and secure. The 20.5-inch wiring harness length provides sufficient reach for direct connection without splicing or extensions.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores accurate air-fuel ratio readings for Hyundai Optima and Kia Sonata\u003c\/li\u003e\n\u003cli\u003eResolves check engine light triggers related to oxygen sensor faults\u003c\/li\u003e\n\u003cli\u003eImproves fuel economy by ensuring proper combustion control\u003c\/li\u003e\n\u003cli\u003eReduces harmful emissions by maintaining optimal sensor function\u003c\/li\u003e\n\u003cli\u003ePrevents engine performance issues caused by faulty oxygen sensors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the NTK 25201 oxygen sensor, ensure the vehicle is cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the wiring harness length and connector match the vehicle’s factory harness to avoid electrical issues. Thread the sensor by hand initially to prevent cross-threading, then tighten to manufacturer torque specifications.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNTK oxygen sensors are manufactured to meet strict quality standards and OEM specifications. The Direct Fit Oxygen Sensor 25201 undergoes rigorous testing to ensure durability and accurate performance. While specific warranty details may vary, NTK typically offers coverage against defects in materials and workmanship to provide confidence in product reliability.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":43964824944821,"sku":"BFPZ-25201","price":124.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_25201_Fro_34a37194-8ade-48f7-b9d8-5ee9648675ab.jpg?v=1775006826","url":"https:\/\/www.partcatalog.com\/products\/ntk-25201-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}