{"product_id":"delphi-es20121-oxygen-sensor","title":"Delphi ES20121 Oxygen Sensor - Front","description":"\u003ch2\u003eDelphi ES20121 Oxygen Sensor Overview\u003c\/h2\u003e\u003cp\u003eThe Delphi ES20121 is a heated oxygen sensor designed specifically for the front position on Mazda 626 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\u003e4-wire design ensuring accurate signal transmission\u003c\/li\u003e\n\u003cli\u003eSquare connector shape for secure and proper fitment\u003c\/li\u003e\n\u003cli\u003eThread size of 18 x 1.5 mm compatible with Mazda 626 exhaust ports\u003c\/li\u003e\n\u003cli\u003eOverall length of 320.0 mm for precise installation\u003c\/li\u003e\n\u003cli\u003eIncludes oxygen sensor and instruction sheet for installation guidance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Compatibility\u003c\/h2\u003e\u003cp\u003eThe Delphi ES20121 oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving fuel efficiency and emissions control. Its 4-wire configuration supports both the sensor signal and heater circuit, ensuring reliable performance. The square connector shape is designed to match the factory wiring harness on Mazda 626 vehicles, preventing connection issues. With a thread size of 18 x 1.5 mm and an overall length of 320.0 mm, this sensor fits securely in the front position of the exhaust system, maintaining proper sensor placement and function.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Resolution\u003c\/h2\u003e\u003cp\u003eThis oxygen sensor is compatible with Mazda 626 models requiring a front-position heated oxygen sensor. It is used to address issues such as:\u003c\/p\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 failing regulatory standards\u003c\/li\u003e\n\u003cli\u003eEngine performance problems related to exhaust gas monitoring\u003c\/li\u003e\n\u003cli\u003eRough idling or hesitation caused by sensor malfunction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Delphi ES20121 oxygen sensor, ensure the engine and exhaust system are cool to avoid burns. Use the included instruction sheet for proper wiring and torque specifications. Verify the square connector aligns correctly with the vehicle harness to prevent electrical issues. It is recommended to apply anti-seize compound on the threads to facilitate future removal. After installation, clear any diagnostic trouble codes and perform a test drive to confirm sensor operation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDelphi oxygen sensors are manufactured to meet OEM standards for durability and accuracy. The ES20121 part number undergoes rigorous testing to ensure consistent performance in emission control systems. This product typically includes a limited warranty covering defects in materials and workmanship, providing confidence in its reliability for Mazda 626 applications.\u003c\/p\u003e","brand":"Delphi","offers":[{"title":"Default Title","offer_id":43388526330037,"sku":"BBMX-ES20121","price":65.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DE_ES20121_Fro.jpg?v=1774712050","url":"https:\/\/www.partcatalog.com\/products\/delphi-es20121-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}