{"product_id":"gm-genuine-parts-acdelco-heated-oxygen-sensor-12657188-oe-fit-fast-warm-up","title":"GM GENUINE PARTS ACDelco Heated Oxygen Sensor 12657188 — OE Fit, Fast Warm-Up","description":"\u003cp\u003e\u003cstrong\u003eGM Genuine Parts ACDelco Heated Oxygen Sensor (part 12657188) is an OE-quality exhaust sensor that measures exhaust oxygen and supplies accurate feedback to your vehicle’s engine control module.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis heated oxygen sensor is engineered to the standards used by General Motors and carries the ACDelco\/GM lineage for fit, function, and durability. It monitors the oxygen level in exhaust gases so the engine control module (ECM) can fine-tune fuel mixture and combustion timing. The result is more consistent engine response, improved emissions control, and optimized fuel use when installed and calibrated correctly.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this sensor affect my vehicle’s fuel efficiency?\u003c\/h3\u003e\n\u003cp\u003eBy reporting precise oxygen levels in the exhaust stream, the sensor enables the ECM to approach the stoichiometric air\/fuel ratio. That balance helps the engine burn fuel more completely, reducing wasted fuel and helping maintain expected fuel economy under normal driving conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProvides real-time oxygen readings to the ECM\u003c\/li\u003e\n  \u003cli\u003eSupports adjustments toward an optimal 14.7:1 air\/fuel ratio\u003c\/li\u003e\n  \u003cli\u003eHeated design reduces warm-up time for accurate readings sooner\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose a GM Genuine Parts\/ACDelco sensor instead of aftermarket alternatives?\u003c\/h3\u003e\n\u003cp\u003eGM Genuine Parts are either the original equipment used during vehicle assembly or components validated by General Motors. That means compatibility, connector fit, and calibration match GM expectations more closely than many aftermarket units.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOE heritage ensures correct physical fit and electrical interface\u003c\/li\u003e\n  \u003cli\u003eTested to GM validation standards for durability and performance\u003c\/li\u003e\n  \u003cli\u003eBacked by the brand association and parts traceability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere is this sensor installed and what are its physical specs?\u003c\/h3\u003e\n\u003cp\u003eThis part mounts in the exhaust system where it can sample combustion gases—commonly upstream or downstream of the catalytic converter depending on the vehicle application. It is a compact electronic sensor supplied as a single unit in a small package suitable for most passenger vehicles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePart number: 12657188 (ACDelco\/GM Genuine Parts)\u003c\/li\u003e\n  \u003cli\u003ePackage dimensions: 8.34 x 3.18 x 2.99 inches, weight about 0.2 pounds\u003c\/li\u003e\n  \u003cli\u003eSupplied as one electronic heated oxygen sensor per package\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill installation require any special tools or recalibration?\u003c\/h3\u003e\n\u003cp\u003eBasic oxygen sensor replacement typically requires common hand tools and an oxygen sensor socket for safe removal. Some vehicles may clear diagnostics automatically after a drive cycle; others could require a scan tool to reset codes or run readiness tests.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse an oxygen sensor socket or appropriate wrench for removal and fit\u003c\/li\u003e\n  \u003cli\u003eTorque to manufacturer specifications to avoid leaks or damage\u003c\/li\u003e\n  \u003cli\u003eConfirm readiness with a scan tool if diagnostic trouble codes appear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The GM Genuine Parts ACDelco Heated Oxygen Sensor 12657188 is intended for GM vehicle owners, professional technicians, and DIY enthusiasts seeking an original-equipment-quality replacement sensor. It suits anyone who needs a direct-fit, tested oxygen sensor to restore correct air\/fuel feedback, help pass emissions diagnostics, or replace a failed or aging sensor with a GM-approved component.\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 part 12657188 a direct replacement for my GM vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: If your vehicle’s parts catalog lists 12657188, it is a direct OE-fit replacement; confirm compatibility using your VIN or vehicle application guide.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this sensor include a heater for faster operation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the GM ACDelco 12657188 is a heated oxygen sensor designed to reach operating temperature faster for accurate readings.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GM GENUINE PARTS","offers":[{"title":"Default Title","offer_id":48083164463262,"sku":"B07JBJ9LQB","price":61.67,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/gm-acdelco-12657188-front-view.jpg?v=1785827331","url":"https:\/\/northtrailauto.ca\/products\/gm-genuine-parts-acdelco-heated-oxygen-sensor-12657188-oe-fit-fast-warm-up","provider":"North Trail Auto","version":"1.0","type":"link"}