{"product_id":"ntk-21558-oxygen-sensor","title":"NTK 21558 Oxygen Sensor","description":"\u003ch2\u003eOverview of NTK Direct Fit Oxygen Sensor 21558\u003c\/h2\u003e\u003cp\u003eThe NTK Direct Fit Oxygen Sensor 21558 is designed for precise emission control in select GM and related vehicles. This heated oxygen sensor features a specific fitment for models such as the Chevrolet Equinox, Buick Lucerne, and GMC Envoy, ensuring reliable performance and compatibility.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated oxygen sensor for faster response times\u003c\/li\u003e\n\u003cli\u003eSpecific fit for select Buick, Cadillac, Chevrolet, GMC, Isuzu, Pontiac, Saab, and Saturn models\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type with 18mm thread diameter\u003c\/li\u003e\n\u003cli\u003e16.5-inch wiring harness length with 4 wires for secure connection\u003c\/li\u003e\n\u003cli\u003ePart number 21558 for accurate identification and replacement\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 product line focuses on providing exact replacement sensors tailored to specific vehicle applications. This ensures that the sensor matches the original equipment specifications, including wiring, thread size, and mounting type. The 21558 sensor is part of this line, offering a direct fit solution that simplifies installation and maintains emission system integrity.\u003c\/p\u003e\u003ch2\u003eProduct Features and Specifications\u003c\/h2\u003e\u003cp\u003eThis oxygen sensor is a heated type, which helps the sensor reach operating temperature quickly for improved fuel management and emissions control. It has a threaded mounting type with an 18mm diameter, compatible with the exhaust system of the listed vehicles. The wiring harness length is 16.5 inches, featuring 4 wires to support the heated sensor function and signal transmission.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBuick Lucerne, Rainier\u003c\/li\u003e\n\u003cli\u003eCadillac DTS\u003c\/li\u003e\n\u003cli\u003eChevrolet Equinox, Malibu, HHR, SSR, Trailblazer, Trailblazer EXT\u003c\/li\u003e\n\u003cli\u003eGMC Envoy, Envoy XL, Terrain\u003c\/li\u003e\n\u003cli\u003eIsuzu Ascender\u003c\/li\u003e\n\u003cli\u003ePontiac G6, Solstice, G6\u003c\/li\u003e\n\u003cli\u003eSaab 9-7x\u003c\/li\u003e\n\u003cli\u003eSaturn Aura, Vue\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by Oxygen Sensor 21558\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCheck engine light triggered by faulty oxygen sensor readings\u003c\/li\u003e\n\u003cli\u003ePoor fuel economy due to incorrect air-fuel mixture\u003c\/li\u003e\n\u003cli\u003eIncreased emissions and failed emissions tests\u003c\/li\u003e\n\u003cli\u003eEngine performance problems such as rough idling or hesitation\u003c\/li\u003e\n\u003cli\u003eDelayed sensor response affecting catalytic converter efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eEnsure the vehicle is cool before beginning installation to avoid burns. Use the correct 18mm socket for removal and installation of the sensor. Verify the wiring harness length of 16.5 inches is sufficient for your vehicle’s routing. Confirm the 4-wire connector matches the original sensor to avoid electrical issues. Follow torque specifications recommended by the vehicle manufacturer to prevent damage.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNTK oxygen sensors are manufactured to meet OEM standards for fit, form, and function. The Direct Fit Oxygen Sensor 21558 undergoes rigorous testing to ensure durability and accurate sensor output. While specific warranty details may vary, NTK typically offers coverage against defects in materials and workmanship to support long-term reliability.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":43961912787125,"sku":"BFPZ-21558","price":59.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_21558_Fro.jpg?v=1775006703","url":"https:\/\/www.partcatalog.com\/products\/ntk-21558-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}