{"product_id":"ntk-21548-oxygen-sensor","title":"NTK 21548 Oxygen Sensor - Downstream Left or Downstream Right","description":"\u003ch2\u003eOverview of NTK Direct Fit Oxygen Sensor 21548\u003c\/h2\u003e\u003cp\u003eThe NTK Direct Fit Oxygen Sensor 21548 is engineered for precise emission control in select GM vehicles. Designed as a heated oxygen sensor with a specific fit, it ensures accurate air-fuel mixture readings for optimal engine performance and reduced emissions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated oxygen sensor type for faster response times\u003c\/li\u003e\n\u003cli\u003eSpecific fit for Cadillac, Chevrolet, GMC, Pontiac, and Saturn models\u003c\/li\u003e\n\u003cli\u003e22.75-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\u003eAbout the NTK Direct Fit Oxygen Sensor Product Line\u003c\/h2\u003e\u003cp\u003eThe Direct Fit Oxygen Sensor line by NTK is designed to provide exact replacement sensors that match OEM specifications. This product line focuses on direct compatibility with vehicle-specific connectors and mounting styles, reducing installation time and ensuring proper sensor function. The 21548 sensor is part of this line, offering a precise fit for various GM models without the need for modifications.\u003c\/p\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe NTK 21548 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving emission control efficiency shortly after engine start. Its 22.75-inch wiring harness length provides sufficient reach for secure connections in the engine bay. The sensor’s four-wire design supports both the heater circuit and signal output, ensuring accurate data transmission to the vehicle’s engine control unit. The threaded mounting type with an 18mm diameter matches factory specifications, facilitating straightforward installation on compatible vehicles.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Common Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCadillac Escalade and Escalade ESV\u003c\/li\u003e\n\u003cli\u003eChevrolet Silverado 1500 HD, 2500 HD, and 3500 HD series\u003c\/li\u003e\n\u003cli\u003eGMC Sierra 1500, 2500, and 3500 series\u003c\/li\u003e\n\u003cli\u003ePontiac G6 and Saturn Aura\u003c\/li\u003e\n\u003cli\u003eSuburban 2500 and Yukon XL 1500\/2500\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by NTK Oxygen Sensor 21548\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 vehicle emissions failing emissions tests\u003c\/li\u003e\n\u003cli\u003eEngine hesitation or rough idling caused by sensor malfunction\u003c\/li\u003e\n\u003cli\u003eFailed oxygen sensor diagnostics in GM vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure vehicle compatibility with the NTK 21548 sensor before installation\u003c\/li\u003e\n\u003cli\u003eUse proper tools to avoid damaging the 18mm threaded mounting\u003c\/li\u003e\n\u003cli\u003eVerify wiring harness connections match the four-wire configuration\u003c\/li\u003e\n\u003cli\u003eAllow the engine to cool before sensor removal or installation\u003c\/li\u003e\n\u003cli\u003eFollow vehicle manufacturer torque specifications for sensor mounting\u003c\/li\u003e\n\u003c\/ul\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 21548 undergoes rigorous testing to ensure reliable operation in emission control systems. Warranty coverage details should be confirmed with the distributor or retailer at the time of purchase.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":43961910395061,"sku":"BFPZ-21548","price":77.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_21548_Fro.jpg?v=1775006702","url":"https:\/\/www.partcatalog.com\/products\/ntk-21548-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}