{"product_id":"delphi-es20390-oxygen-sensor","title":"Delphi ES20390 Oxygen Sensor - Rear","description":"\u003ch2\u003eDelphi ES20390 Oxygen Sensor Overview\u003c\/h2\u003e\u003cp\u003eThe Delphi ES20390 is a heated oxygen sensor designed specifically for the rear position on Mazda 3 models. This sensor plays a critical role in monitoring exhaust gases to optimize engine performance and reduce emissions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated sensor type for faster response times\u003c\/li\u003e\n\u003cli\u003eFour-wire design ensuring accurate signal transmission\u003c\/li\u003e\n\u003cli\u003eSquare connector shape for secure and reliable connection\u003c\/li\u003e\n\u003cli\u003eThread size of 18 x 1.5 mm compatible with Mazda 3 exhaust systems\u003c\/li\u003e\n\u003cli\u003eOverall length of 800 mm for proper fitment in rear exhaust location\u003c\/li\u003e\n\u003cli\u003eIncludes oxygen sensor and instruction sheet for installation guidance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Delphi ES20390 oxygen sensor is engineered to meet the specific requirements of Mazda 3 vehicles. Featuring a heated sensor element, it quickly reaches optimal operating temperature, providing precise oxygen level readings to the engine control unit (ECU). The four-wire configuration supports both the sensor signal and heater circuit, improving sensor responsiveness and durability. Its square connector shape ensures a secure fit with the vehicle’s wiring harness, while the 18 x 1.5 mm thread size matches the factory exhaust port. With an overall length of 800 mm, this sensor is designed for the rear exhaust position, helping maintain proper emissions control and engine efficiency.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHelps reduce excessive fuel consumption caused by faulty oxygen sensors\u003c\/li\u003e\n\u003cli\u003ePrevents engine performance issues related to incorrect air-fuel mixture\u003c\/li\u003e\n\u003cli\u003eAssists in lowering harmful exhaust emissions to meet regulatory standards\u003c\/li\u003e\n\u003cli\u003eResolves check engine light triggers related to rear oxygen sensor faults\u003c\/li\u003e\n\u003cli\u003eSupports smooth engine operation and improved fuel economy\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the vehicle is cool before sensor removal to avoid burns\u003c\/li\u003e\n\u003cli\u003eUse appropriate oxygen sensor socket or wrench for installation\u003c\/li\u003e\n\u003cli\u003eApply anti-seize compound on threads if not pre-coated to prevent seizing\u003c\/li\u003e\n\u003cli\u003eVerify connector shape matches vehicle harness before installation\u003c\/li\u003e\n\u003cli\u003eFollow the included instruction sheet for proper torque specifications and wiring connections\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDelphi oxygen sensors are manufactured to meet OEM specifications, ensuring reliable performance and durability. The ES20390 part number undergoes rigorous testing to comply with emission control standards. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship to provide confidence in product quality.\u003c\/p\u003e","brand":"Delphi","offers":[{"title":"Default Title","offer_id":43388534325429,"sku":"BBMX-ES20390","price":132.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DE_ES20390_Ang.jpg?v=1774712091","url":"https:\/\/www.partcatalog.com\/products\/delphi-es20390-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}