{"product_id":"air-charge-temperature-sensor-fits-mercruiser-volvo-penta-v6-v8-mpi-replaces-805223t-3854527-18-7702","title":"Air Charge Temperature Sensor – Fits MerCruiser Volvo Penta V6 V8 MPI (Replaces 805223T, 3854527, 18-7702)","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis Air Charge Temperature Sensor is designed for MerCruiser and Volvo Penta marine engines, including V6 and V8 MPI models such as the 350, 454, 496, and 502 series. The Intake Air Temperature (IAT) Flame Arrestor Sensor Assembly monitors air charge temperature for optimal engine performance across 7.4L (1994–2000) and 8.1L (2005–Current) applications.\u003c\/p\u003e\n\u003cp\u003eThis aftermarket sensor directly replaces Mercury MerCruiser 805223T, Volvo Penta 3854527, and Sierra Marine 18-7702.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIntake Air Temperature Flame Arrestor Sensor Assembly for MPI engines\u003c\/li\u003e\n  \u003cli\u003eCompatible with most Volvo Penta and MerCruiser V6\/V8 models\u003c\/li\u003e\n  \u003cli\u003eDrop-in replacement for factory sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e805223T\u003c\/td\u003e\n        \u003ctd\u003eOEM\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e3854527\u003c\/td\u003e\n        \u003ctd\u003eOEM\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra Marine\u003c\/td\u003e\n        \u003ctd\u003e18-7702\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003eV6 \u0026amp; V8 MPI (350, 454, 496, 502)\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e7.4L\u003c\/td\u003e\n        \u003ctd\u003e1994–2000\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e8.1L\u003c\/td\u003e\n        \u003ctd\u003e2005–Current\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003eMost Models\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eV6 \u0026amp; V8 MPI\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eType\u003c\/dt\u003e\n  \u003cdd\u003eIntake Air Temperature Flame Arrestor Sensor\u003c\/dd\u003e\n  \u003cdt\u003eEngine Type\u003c\/dt\u003e\n  \u003cdd\u003eVOLVO PENTA MerCruiser Marine Engines\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eV6 \u0026amp; V8 MPI\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003e1 × Intake Air Temperature Sensor\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery negative terminal before beginning work.\u003c\/li\u003e\n  \u003cli\u003eLocate the existing air charge temperature sensor on the intake manifold or flame arrestor.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the electrical connector from the old sensor.\u003c\/li\u003e\n  \u003cli\u003eRemove the sensor by unscrewing it counterclockwise from the housing.\u003c\/li\u003e\n  \u003cli\u003eInspect the mounting threads and clean if necessary.\u003c\/li\u003e\n  \u003cli\u003eInstall the new sensor hand-tight, then snug with a wrench—do not overtighten.\u003c\/li\u003e\n  \u003cli\u003eReconnect the electrical connector until it clicks into place.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and start the engine to verify proper operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I know if my air charge temperature sensor is failing?\u003c\/summary\u003e\u003cp\u003eCommon symptoms include rough idle, poor fuel economy, engine hesitation, or diagnostic trouble codes related to intake air temperature. The engine control module relies on accurate air temperature readings for optimal fuel delivery.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this sensor work with my flame arrestor?\u003c\/summary\u003e\u003cp\u003eYes, this is an Intake Air Temperature Flame Arrestor Sensor Assembly designed to mount directly on compatible MerCruiser and Volvo Penta flame arrestors. Verify your engine model against the compatibility table above.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat's the difference between this and the OEM sensor?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I install this sensor myself?\u003c\/summary\u003e\u003cp\u003eInstallation is straightforward for those comfortable with basic marine engine service. The sensor threads into the intake assembly and requires only a wrench and electrical connector. Professional installation is recommended if you are unfamiliar with marine electrical systems.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should I replace the air charge temperature sensor?\u003c\/summary\u003e\u003cp\u003eReplace the sensor when diagnostic codes appear, when the engine exhibits performance issues related to air–fuel mixture, or if the sensor is physically damaged. Sensors do not have a fixed service interval but should be inspected during routine maintenance.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this sensor compatible with both V6 and V8 engines?\u003c\/summary\u003e\u003cp\u003eYes, this sensor fits MerCruiser V6 and V8 MPI engines, including 350, 454, 496, and 502 models, as well as most Volvo Penta V6\/V8 MPI configurations. Always cross-reference your OEM part number to confirm fitment.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003eManufacturer-Direct Value — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":51025809375547,"sku":"23SE188","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/s-l1600_81fe0849-21af-4528-8903-5ecbf19ce0dc.jpg?v=1773149414","url":"https:\/\/seasierra.com\/products\/air-charge-temperature-sensor-fits-mercruiser-volvo-penta-v6-v8-mpi-replaces-805223t-3854527-18-7702","provider":"SeaSierra","version":"1.0","type":"link"}