{"product_id":"moroso-01-06-bmw-e46-m3-coolant-expansion-tank-direct-bolt-in-replacement","title":"Moroso 01-06 BMW E46 M3 Coolant Expansion Tank - Direct Bolt-In Replacement","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e63793\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 84663637933\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eMoroso 01-06 BMW E46 M3 Coolant Expansion Tank - Direct Bolt-In Replacement\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThis Moroso coolant expansion tank serves as a direct replacement for the factory unit on 2001-2006 BMW E46 M3 models. The OEM plastic tank often cracks under heat and pressure leading to leaks and overheating. Moroso's design uses stronger materials with extra capacity to maintain consistent coolant levels during track or street driving.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Bolt-In Fit:\u003c\/strong\u003e Matches OEM mounting points for simple installation without modifications on E46 M3.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarger Capacity:\u003c\/strong\u003e Holds more coolant than stock to reduce overflow and provide buffer during high-heat conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Temp Nylon Construction:\u003c\/strong\u003e Translucent material resists cracking and warping from engine heat and pressure cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear Level Visibility:\u003c\/strong\u003e Easy monitoring of coolant levels without removal for quick checks at the track.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure-Resistant Design:\u003c\/strong\u003e Handles boosted or high-rpm demands common in modified M3 engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInspect OEM tank during replacement for cracks or damage.\u003c\/li\u003e\n\u003cli\u003eFill with compatible coolant and bleed system after install.\u003c\/li\u003e\n\u003cli\u003eSecure packaging protects against shipping damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eDrain coolant system before removal of old tank.\u003c\/li\u003e\n\u003cli\u003eUses factory hardware and hoses for plug-and-play fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2001-2006\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003eE46\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose Moroso?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMoroso builds parts trusted by racers since 1958.\u003c\/li\u003e\n\u003cli\u003eFocus on cooling solutions for high-performance engines.\u003c\/li\u003e\n\u003cli\u003eEngineered for precision fit and long-term durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Does this fit non-M3 E46 models?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e No, designed specifically for 2001-2006 BMW E46 M3 coolant system layout and mounting.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material is the tank made from?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e High-temperature translucent nylon that withstands 250+ degree heat without deforming.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the warranty and install process?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Backed by Moroso limited warranty. Bolt-in takes 30 minutes with basic tools after draining coolant.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS Ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock - ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Secure box 10 x 8 x 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Moroso","offers":[{"title":"Default Title","offer_id":40751243591759,"sku":"MOR63793","price":433.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/moroso-01-06-bmw-e46-m3-coolant-expansion-tank-direct-bolt-in-replacement-moroso.jpg?v=1776538521","url":"https:\/\/www.blackopsautoworks.com\/products\/moroso-01-06-bmw-e46-m3-coolant-expansion-tank-direct-bolt-in-replacement","provider":"Black Ops Auto Works","version":"1.0","type":"link"}