{"product_id":"def-idle-air-control-valve-motor-iac-replacement-set-of-2-direct-fit-862998-18-7701-with-gaskets","title":"DEF Idle Air Control Valve Motor (IAC) Replacement Set of 2 — Direct-Fit 862998\/18-7701 with Gaskets","description":"\u003cp\u003e\u003cstrong\u003eThese two DEF Idle Air Control (IAC) valve motors, part numbers 862998 and 18-7701, are direct-fit replacements supplied with gaskets for compatible marine and automotive ECM 555 (2001 and newer) and a range of Alpha\/Bravo engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your engine is experiencing rough idle, inconsistent RPM, or you need a reliable service replacement for routine maintenance, these DEF IAC valves provide a straightforward swap. Sold as a pair with replacement gaskets, they match the OE fit for multiple V8 and V6 marine powerplants and several automotive EFI applications, making them a practical spare-parts purchase for boat owners and mechanics.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and control modules will these IAC valves fit?\u003c\/h3\u003e\n\u003cp\u003eThese replacement valves are engineered to fit ECM 555 control systems (2001 and later) and a wide set of Alpha and Bravo engine families. They cover several displacement options and both MPI and EFI setups common in marine propulsion.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with ECM 555 models from 2001 onward\u003c\/li\u003e\n  \u003cli\u003eFits Alpha engines: 4.3L, 5.0L, 5.0LX, 5.7L (including Bravo EFI variants)\u003c\/li\u003e\n  \u003cli\u003eCompatible with MAG and MPI engines: 350 MAG, 454 MAG MPI, 502 MAG MPI\u003c\/li\u003e\n  \u003cli\u003eSupports large-displacement MIE\/MPI models: 7.4L and 8.2L\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these valves address idle and throttle issues?\u003c\/h3\u003e\n\u003cp\u003eIdle Air Control valves regulate airflow around the throttle plate when the throttle is closed, helping maintain stable idle speed and smooth transitions. Replacing a worn or sticking valve can restore consistent RPM and reduce stalling or surging at idle.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores controlled bypass airflow when the throttle is closed\u003c\/li\u003e\n  \u003cli\u003eHelps correct low, fluctuating, or high idle conditions\u003c\/li\u003e\n  \u003cli\u003eReduces hunting or surging caused by faulty IAC operation\u003c\/li\u003e\n  \u003cli\u003eDelivered with gaskets for a proper seal during installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the package and what should I prepare for installation?\u003c\/h3\u003e\n\u003cp\u003eThe product is shipped as a set of two DEF Idle Air Control valves with replacement gaskets, ready for direct installation. Basic hand tools and adherence to vehicle or marine service manuals are recommended for a safe and effective swap.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes 2x DEF IAC valve motors (862998 \/ 18-7701)\u003c\/li\u003e\n  \u003cli\u003eComes with matching gaskets to ensure proper sealing\u003c\/li\u003e\n  \u003cli\u003ePrepare standard hand tools, torque specs, and a clean mating surface\u003c\/li\u003e\n  \u003cli\u003eFollow ECM-specific programming or adaptation procedures if required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these new parts and how do they compare to OEM units?\u003c\/h3\u003e\n\u003cp\u003eThese DEF valves are brand-new replacement units manufactured to meet fit and function expectations for the referenced numbers. They are intended as direct-fit service parts for mechanics and owners who need reliable replacements without sourcing costly OEM originals.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNew, unused components designed for direct interchange\u003c\/li\u003e\n  \u003cli\u003eBuilt to match mounting, electrical, and airflow characteristics of OE parts\u003c\/li\u003e\n  \u003cli\u003eSold as service-replacement pair for convenience and spares\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This set is aimed at marine technicians, boat owners, and automotive mechanics maintaining or repairing Alpha\/Bravo and MAG\/MPI-equipped engines controlled by ECM 555 (2001+). It's ideal for anyone needing a straightforward, cost-effective replacement for aging or failing IAC valves who wants the convenience of a two-piece kit with gaskets included.\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: Will these IAC valves work on my ECM 555 from 2002?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. These DEF IAC valves are compatible with ECM 555 models from 2001 and newer, including 2002 units.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need any programming after installing these replacement valves?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Some systems may require ECM adaptation or relearn; consult your engine service manual for specific procedures.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"DEF","offers":[{"title":"Default Title","offer_id":48083977699486,"sku":"B07ZCLY6ZL","price":73.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/def-iac-valve-front-view.jpg?v=1785842004","url":"https:\/\/northtrailauto.ca\/products\/def-idle-air-control-valve-motor-iac-replacement-set-of-2-direct-fit-862998-18-7701-with-gaskets","provider":"North Trail Auto","version":"1.0","type":"link"}