{"product_id":"ecs-tuning-mini-r5x-heavy-duty-aluminum-coolant-expansion-tank-17137823626","title":"ECS Tuning MINI R5X Heavy Duty Aluminum Coolant Expansion Tank (17137823626)","description":"\u003cdiv class=\"productlongdesc\"\u003e\n\u003cp\u003eGen2 MINI R5X models (R55, R56, R57, R58, R59, R60, and R61 chassis) utilize a closed, pressurized cooling system to maintain optimal engine operating temperature. At the center of this system is the plastic expansion tank, which is constantly exposed to piping hot, chemical-laden antifreeze. After years of use, the expansion tank degrades. This degradation causes the tank to turn brittle and yellow, eventually leading to micro-fractures, cracking along the factory blow-molded seam, or worse, a catastrophic break. Because coolant loss under pressure can occur rapidly, a failing stock tank frequently leads to severe overheating issues or unexpected roadside breakdowns.\u003c\/p\u003e\n\u003cp\u003eOur Heavy Duty Aluminum Coolant Expansion Tank directly addresses every structural flaw of the factory unit (17137823626) by replacing molded plastic composition with a fully TIG-welded 5052 aluminum construction. Aluminum eliminates the risk of seam separation, cracking, or heat deformation, providing a permanent solution that handles pressure and heat without expanding or fatiguing. To ensure exact fitment, the tank was designed using 3D CAD modeling, allowing for plug-and-play installation in the factory location. Unlike many aftermarket alternatives, no cutting, drilling, or custom brackets are required for installing the ECS Heavy Duty Aluminum Expansion Tank!\u003c\/p\u003e\n\u003cp\u003eAll hose barbs, bleed screws, and sensor ports are CNC-machined to precise tolerances, guaranteeing a leak-free seal with factory quick-disconnect hoses. A precision-designed threaded cap fitting ensures buttery smooth integration of the factory cap, as well as a precision seal with internal cap O-rings. To aid in serviceability, an integrated internal fill-level sightglass eliminates guesswork, allowing you to easily view your coolant level at a glance. The heavy-duty wrinkle black powder coat isn't just for aesthetics—it protects the exterior of the tank from corrosion and engine bay heat, maintaining a clean, OEM+ look for years to come. \u003c\/p\u003e\n\u003cp\u003e** Cap Design yellow warning on it now like OEM **\u003c\/p\u003e\n\u003cp\u003eFEATURES\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eManufactured from 5052 and 6061 aluminum and fully TIG-welded, providing high structural strength that easily withstands elevated engine temperatures and extreme cooling system demands\u003c\/li\u003e\n\u003cli\u003ePressure tested to 31 psi, ensuring absolutely zero fluid leakage, and consistent system pressure far exceeding normal operating conditions\u003c\/li\u003e\n\u003cli\u003eFeatures a clear external sight glass set at the low-level mark for rapid, at-a-glance coolant checks, alongside an internal bent sheet metal fill tab to identify the exact full capacity level during service\u003c\/li\u003e\n\u003cli\u003eDesigned to use all factory mounting geometry—sliding directly into the lower rubber mount and snapping over the stock retaining tabs\u003c\/li\u003e\n\u003cli\u003eHose inlet, outlet, and cap connections are CNC-machined to exacting tolerances\u003c\/li\u003e\n\u003cli\u003eWrinkle black powder finish protects raw aluminum from oxidation while providing a clean, OEM+ look\u003c\/li\u003e\n\u003cli\u003eReplaces OEM plastic expansion tank part numbers 17137539267 and 17137823626 across all Gen 2 MINI R56-R61 platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKIT CONTENTS\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeavy Duty Aluminum Coolant Expansion Tank\u003c\/li\u003e\n\u003cli\u003eCoolant Expansion Tank Cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePRODUCT DEVELOPMENT\u003c\/p\u003e\n\u003cp\u003eOur Heavy Duty Aluminum Expansion Tank was designed, engineered, tested, and quality inspected by our Research \u0026amp; Development team. Our development process includes leading-edge product technology: FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.\u003c\/p\u003e\n\u003cp\u003eINSTALLATION\u003c\/p\u003e\n\u003cp\u003eTo aid in the installation process, we've assembled a start-to-finish installation guide, including detailed instructions on removing your factory cooling expansion tank and associated components. Click the \"INSTALLATION\" button above for complete instructions. \u003c\/p\u003e\n\u003c\/div\u003e","brand":"ECS Tuning","offers":[{"title":"Default Title","offer_id":67790544437552,"sku":"5492242","price":394.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/7582\/4176\/files\/2102224_x800_6e484b0d-0697-4013-8127-5196eb83bcc6.jpg?v=1789514936","url":"https:\/\/es-performance.com\/en-us\/products\/ecs-tuning-mini-r5x-heavy-duty-aluminum-coolant-expansion-tank-17137823626","provider":"Eurosport Performance","version":"1.0","type":"link"}