{"product_id":"ntk-21550-oxygen-sensor","title":"NTK 21550 Oxygen Sensor - Downstream","description":"\u003ch2\u003eOverview of NTK Direct Fit Oxygen Sensor 21550\u003c\/h2\u003e\u003cp\u003eThe NTK Direct Fit Oxygen Sensor 21550 is designed specifically for select Buick, Chevrolet, Oldsmobile, and Pontiac models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine management system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated sensor type for faster response times\u003c\/li\u003e\n\u003cli\u003eSpecific fit for Buick Achieva, Chevrolet Cavalier, Oldsmobile Cutlass, Pontiac Grand Am, Skylark, and Sunfire\u003c\/li\u003e\n\u003cli\u003e67.75-inch wiring harness length for proper installation\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type with 18mm thread diameter\u003c\/li\u003e\n\u003cli\u003eFour-wire configuration for reliable signal transmission\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetails on the Direct Fit Oxygen Sensor Line\u003c\/h2\u003e\u003cp\u003eThe NTK Direct Fit Oxygen Sensor line is engineered to provide exact replacement sensors tailored to specific vehicle applications. This ensures compatibility and reduces installation time by matching OEM specifications. The 21550 part number belongs to this line, offering a direct fit solution for emission control systems in various GM models.\u003c\/p\u003e\u003ch2\u003eProduct Features and Specifications\u003c\/h2\u003e\u003cp\u003eThis oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving sensor accuracy and reducing emissions during cold starts. The 67.75-inch wiring harness length provides sufficient reach for proper connection without excess slack. Its threaded mounting type with an 18mm diameter ensures secure installation in the exhaust system. The four-wire design supports both the sensor signal and heater circuit, maintaining consistent performance.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHelps correct engine misfires caused by faulty oxygen sensor readings\u003c\/li\u003e\n\u003cli\u003eReduces rough idling and poor fuel economy linked to sensor failure\u003c\/li\u003e\n\u003cli\u003eAddresses check engine light triggers related to emission control faults\u003c\/li\u003e\n\u003cli\u003eImproves catalytic converter efficiency by providing accurate air-fuel data\u003c\/li\u003e\n\u003cli\u003ePrevents increased exhaust emissions due to sensor degradation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the NTK 21550 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 setup. Apply anti-seize compound to the threads if recommended by the vehicle manufacturer to facilitate future removal. Confirm proper torque specifications during installation to avoid damage.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNTK oxygen sensors are manufactured to meet or exceed OEM standards for durability and performance. The Direct Fit Oxygen Sensor 21550 undergoes rigorous testing to ensure reliable operation within the specified Buick, Chevrolet, Oldsmobile, and Pontiac models. Warranty coverage details should be confirmed with the product documentation or supplier.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":43961910460597,"sku":"BFPZ-21550","price":86.31,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_21550_Fro.jpg?v=1775006703","url":"https:\/\/www.partcatalog.com\/products\/ntk-21550-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}