{"product_id":"spectra-ma478-mass-air-flow-sensor","title":"Spectra MA478 Mass Air Flow Sensor","description":"\u003ch2\u003eSpectra MA478 Mass Air Flow Sensor\u003c\/h2\u003e\u003cp\u003eThe Spectra MA478 mass air flow sensor is a standard replacement part built for accurate airflow measurement and stable engine management. It uses a programmable ceramic circuit board with a premium silicon coating to help protect the sensor from under-hood heat swings and road vibration. Compatible With BMW 550i, 650i, 750i, X5, and X6 applications across multiple model years.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMass air flow sensor for emission control and engine air metering\u003c\/li\u003e\n\u003cli\u003eProgrammable ceramic circuit board with silicon coating\u003c\/li\u003e\n\u003cli\u003eFast signal response for consistent airflow readings\u003c\/li\u003e\n\u003cli\u003eAll-platinum resistance thermometer sensor design\u003c\/li\u003e\n\u003cli\u003eBlack plastic housing with oval 1-connector, 5-terminal male pin configuration\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for direct-fit service applications\u003c\/li\u003e\n\u003cli\u003eNo housing, wiring harness, mounting bracket, or mounting hardware included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThe Spectra MA478 is engineered to measure incoming air so the engine control system can adjust fuel delivery and maintain proper drivability. Its circuit design is built for quicker signal response and consistent output, while the silicon-coated ceramic board adds protection against vibration and temperature variation common in daily driving. This part cross-references Delphi AF10421 for the same application. For BMW owners searching for a BMW 550i mass air flow sensor, BMW 750i MAF sensor, or BMW X5 air flow sensor replacement, the MA478 provides a direct service option for the listed vehicles.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRough idle caused by inaccurate airflow readings\u003c\/li\u003e\n\u003cli\u003eHesitation or sluggish throttle response\u003c\/li\u003e\n\u003cli\u003eCheck engine light related to air metering faults\u003c\/li\u003e\n\u003cli\u003ePoor fuel control from a failing MAF sensor\u003c\/li\u003e\n\u003cli\u003eDriveability issues on BMW 650i, 750Li, X6, and related applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVerify the connector shape, terminal count, and mounting style before installation.\u003c\/li\u003e\n\u003cli\u003eInspect the intake tube and air filter housing for leaks or contamination before replacing the sensor.\u003c\/li\u003e\n\u003cli\u003eHandle the sensing element carefully and avoid touching the internal components.\u003c\/li\u003e\n\u003cli\u003eClear diagnostic trouble codes after installation and confirm idle quality and throttle response.\u003c\/li\u003e\n\u003cli\u003eUse the fitment list to confirm the exact BMW year and model match before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eSpectra manufactures this sensor as a standard replacement part for emission control service. The MA478 is built with a protected circuit design and platinum resistance sensing elements to support consistent operation in demanding under-hood conditions.\u003c\/p\u003e","brand":"Spectra","offers":[{"title":"Default Title","offer_id":52827927511221,"sku":"BCNK-MA478","price":382.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/SQ_MA478_Fro.jpg?v=1784615597","url":"https:\/\/www.partcatalog.com\/products\/spectra-ma478-mass-air-flow-sensor","provider":"PartCatalog","version":"1.0","type":"link"}