{"product_id":"ntk-21544-oxygen-sensor","title":"NTK 21544 Oxygen Sensor","description":"\u003ch2\u003eDirect Fit Oxygen Sensor Overview\u003c\/h2\u003e\u003cp\u003eNTK 21544 is a direct fit heated oxygen sensor built for specific applications in Chevrolet Camaro, Pontiac Firebird, and Cadillac models. It uses a threaded mounting design and a 4-wire heated configuration to match OE-style sensor placement and signal response.\u003c\/p\u003e\u003cp\u003eAs part of NTK's Direct Fit Oxygen Sensor line, this sensor is engineered for specific vehicle applications rather than universal use. The design focuses on correct fit, form, and function for emission control service.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit oxygen sensor for targeted emission control applications\u003c\/li\u003e\n\u003cli\u003eHeated sensor design for faster operating response\u003c\/li\u003e\n\u003cli\u003e4-wire construction for OE-style signal and heater circuit layout\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type for direct replacement installation\u003c\/li\u003e\n\u003cli\u003e16.75-inch wiring harness length for application-specific routing\u003c\/li\u003e\n\u003cli\u003e18 mm thread diameter\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Application Coverage\u003c\/h2\u003e\u003cp\u003eNTK 21544 covers multiple fitments across 1996-2002 Chevrolet Camaro, 1998-2002 Pontiac Firebird, and 1996-1999 Cadillac DeVille, Eldorado, and Seville applications. Fitment includes upstream and downstream positions, with notes that identify OE-equivalent design and sensor location details for the correct application match. This part number, 21544, is used for direct-fit replacement where the original sensor configuration matches the listed vehicle and position.\u003c\/p\u003e\u003cp\u003eNTK's Direct Fit Oxygen Sensor line is backed by the brand's role as a major original equipment oxygen sensor supplier. The product line is built around OE application technology and manufacturing controls that support consistent fit and function across import and domestic coverage.\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\u003eSlow or inaccurate air-fuel ratio feedback\u003c\/li\u003e\n\u003cli\u003eHeater circuit fault codes\u003c\/li\u003e\n\u003cli\u003eEmissions test failure caused by sensor degradation\u003c\/li\u003e\n\u003cli\u003eRough idle or fuel trim issues tied to sensor response\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the listed year, make, model, and sensor position before installation. Confirm the threaded mounting style, wire count, and harness length match the original sensor configuration. For best results, compare the existing sensor location and OE reference notes before replacing the part number 21544.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK states that these oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. The brand also emphasizes OE application technology and original equipment-level fit, form, and function for emission control service.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53260846039221,"sku":"BFPZ-21544","price":65.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_21544_Fro.jpg?v=1789276722","url":"https:\/\/www.partcatalog.com\/products\/ntk-21544-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}