{"product_id":"bosch-15521-oxygen-sensor","title":"Bosch 15521 Oxygen Sensor","description":"\u003ch2\u003eReliable Oxygen Sensor for Nissan and INFINITI Vehicles\u003c\/h2\u003e\u003cp\u003eThe Bosch Validated Oxygen Sensor 15521 is designed specifically for select Nissan and INFINITI models, including the Altima, Maxima, Quest, M45, and Q45. This narrow-band heated oxygen sensor ensures accurate emissions control and optimal engine performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSpecific fit for Nissan Altima, Maxima, Quest and INFINITI M45, Q45\u003c\/li\u003e\n\u003cli\u003eNarrow-band heated oxygen sensor type for precise air-fuel mixture readings\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type with 18 mm thread diameter and 22 mm hex size\u003c\/li\u003e\n\u003cli\u003eFour-wire design with blade terminals and a square male connector\u003c\/li\u003e\n\u003cli\u003eDurable metal housing finished in steel for long-lasting performance\u003c\/li\u003e\n\u003cli\u003eIncludes wiring harness for straightforward connection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eAbout the Bosch Validated Oxygen Sensor Line\u003c\/h2\u003e\u003cp\u003eThe Bosch Validated Oxygen Sensor line is engineered to meet strict OEM specifications, providing reliable emissions control components tailored to specific vehicle applications. The 15521 sensor is part of this line, offering a standard replacement grade with a heated narrow-band sensor design to maintain accurate oxygen level detection and support efficient engine management systems.\u003c\/p\u003e\u003ch2\u003eProduct Details and Specifications\u003c\/h2\u003e\u003cp\u003eThis Bosch oxygen sensor features a threaded mounting type with an 18 mm thread diameter and a 22 mm hex size for installation using standard tools. The sensor is a narrow-band heated type, which helps the engine control unit (ECU) monitor and adjust the air-fuel ratio for optimal combustion and reduced emissions. The sensor includes a four-wire configuration with blade terminals and a square male connector, ensuring a secure and reliable electrical connection. The metal housing finished in steel provides durability against harsh engine conditions. The wiring harness is included, facilitating easier installation in compatible Nissan and INFINITI models.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores accurate oxygen level readings for proper fuel mixture adjustments\u003c\/li\u003e\n\u003cli\u003eHelps resolve check engine light triggers related to oxygen sensor faults\u003c\/li\u003e\n\u003cli\u003eImproves fuel efficiency by enabling precise air-fuel ratio control\u003c\/li\u003e\n\u003cli\u003eReduces harmful emissions by maintaining proper combustion\u003c\/li\u003e\n\u003cli\u003ePrevents engine performance issues caused by faulty sensor signals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Bosch 15521 oxygen sensor, ensure the engine is cool to avoid burns. Use a 22 mm oxygen sensor socket or wrench for removal and installation. Verify the sensor’s wiring harness and connector match the vehicle’s factory setup to ensure proper fitment. Avoid over-tightening the sensor to prevent thread damage. Since this sensor is a specific fit for Nissan Altima, Maxima, Quest and INFINITI M45, Q45 models, confirm compatibility before installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eBosch oxygen sensors are manufactured to meet OEM standards for durability and performance. The Bosch Validated Oxygen Sensor 15521 undergoes rigorous testing to ensure reliable operation in emission control systems. This part is a standard replacement grade product designed to maintain factory-level functionality. Warranty details should be confirmed with the parts provider or Bosch directly.\u003c\/p\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":51950871052469,"sku":"BBHK-15521","price":148.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/BS_15521_Fro.jpg?v=1775059424","url":"https:\/\/www.partcatalog.com\/products\/bosch-15521-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}