{"product_id":"gm-genuine-parts-heated-oxygen-sensor-213-3866-oe-fit-direct-replacement-with-heater-circuit","title":"GM GENUINE PARTS Heated Oxygen Sensor 213-3866 — OE-Fit Direct Replacement with Heater Circuit","description":"\u003cp\u003e\u003cstrong\u003eGM Genuine Parts 213-3866 (12583804) is a direct-replacement heated oxygen (O2) sensor engineered to restore accurate exhaust oxygen readings for GM vehicles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis heated oxygen sensor monitors oxygen levels in the exhaust stream and supplies precise feedback to the engine control module (ECM), enabling the ECM to fine-tune the air\/fuel mixture. Built to General Motors specifications and backed by GM validation, the part replaces the original factory sensor to help maintain emissions control, driveability and fuel efficiency without guesswork.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this O2 sensor affect engine performance and fuel economy?\u003c\/h3\u003e\n\u003cp\u003eA properly working O2 sensor ensures the ECM receives accurate exhaust oxygen data so it can adjust fuel delivery toward the target stoichiometric ratio. When the sensor is performing as designed, combustion is closer to the ideal balance, reducing unburned fuel and lowering emissions while helping maintain smooth engine response.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProvides real-time oxygen readings for ECM adjustments\u003c\/li\u003e\n  \u003cli\u003eHelps maintain near-optimal 14.7:1 air\/fuel ratio under typical conditions\u003c\/li\u003e\n  \u003cli\u003eSupports consistent combustion for better throttle response\u003c\/li\u003e\n  \u003cli\u003eContributes to improved fuel efficiency relative to a failing sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose the GM Genuine Parts 213-3866 instead of an aftermarket sensor?\u003c\/h3\u003e\n\u003cp\u003eThis sensor is manufactured to GM OE specifications and is the factory-recommended replacement for compatible GM vehicles. Using a GM Genuine Parts sensor reduces fitment issues and ensures the heater circuit, connector, and calibration match the original component the vehicle was designed around.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned and validated by General Motors for GM vehicles\u003c\/li\u003e\n  \u003cli\u003eOE-fitment for correct connector and mounting geometry\u003c\/li\u003e\n  \u003cli\u003eBuilt to the same performance and durability targets as the original part\u003c\/li\u003e\n  \u003cli\u003eBacked by GM parts support and quality standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the installation and compatibility considerations?\u003c\/h3\u003e\n\u003cp\u003eInstallation typically involves replacing the sensor in the exhaust system at the designated threaded bung and reconnecting the electrical plug. Always verify the part number against your vehicle’s VIN and model year to confirm fitment, and follow safe lifting and cooling procedures before working on the exhaust.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThreaded installation into the OEM exhaust bung\u003c\/li\u003e\n  \u003cli\u003eReuses existing wiring harness and connector designed for the OE sensor\u003c\/li\u003e\n  \u003cli\u003eConfirm compatibility by checking part number 213-3866 or OEM 12583804 against vehicle application\u003c\/li\u003e\n  \u003cli\u003eObserve cooling time and proper torque during installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long can I expect this sensor to last and what affects lifespan?\u003c\/h3\u003e\n\u003cp\u003eService life varies with driving conditions, fuel quality, and exposure to contaminants, but OEM-style heated sensors generally last many tens of thousands of miles under normal use. Regular maintenance of the engine and exhaust system helps preserve sensor health and accuracy.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTypical lifespan depends on mileage and operating conditions\u003c\/li\u003e\n  \u003cli\u003eContaminants, oil or coolant leaks shorten sensor life\u003c\/li\u003e\n  \u003cli\u003eHeater circuit helps faster warm-up, improving operation on short trips\u003c\/li\u003e\n  \u003cli\u003eTimely replacement prevents long-term fuel trim and emissions issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers and technicians who need a direct, GM-recommended replacement oxygen sensor for GM vehicles—owners seeking OE fit, correct connector compatibility, and the assurance of parts validated by General Motors. Choose the GM Genuine Parts 213-3866 when you want the same specifications and performance targets as the vehicle’s original sensor to maintain emissions control, fuel efficiency, and reliable engine management.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this O2 sensor a direct replacement for the original GM part?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 213-3866 (12583804) is the GM-recommended direct-replacement sensor built to OE specifications for compatible GM vehicles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will installing this sensor improve fuel economy immediately?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replacing a faulty oxygen sensor helps the ECM restore correct fuel trims, which can improve fuel economy, but gains depend on vehicle condition and driving habits.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GM GENUINE PARTS","offers":[{"title":"Default Title","offer_id":48081304551582,"sku":"B0010GHAIS","price":79.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/gm-genuine-parts-213-3866-front-view.jpg?v=1785798919","url":"https:\/\/northtrailauto.ca\/products\/gm-genuine-parts-heated-oxygen-sensor-213-3866-oe-fit-direct-replacement-with-heater-circuit","provider":"North Trail Auto","version":"1.0","type":"link"}