{"product_id":"radiator-coolant-overflow-tank-reservoir-mazda-rx-8-2004-2011","title":"Radiator Coolant Overflow Tank Reservoir Mazda RX-8 (2004-2011)","description":"\u003ch2\u003eDirect Replacement Radiator Coolant Overflow Tank for 2004-2011 Mazda RX-8\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect OEM Replacement:\u003c\/strong\u003e This coolant overflow tank reservoir acts as a direct replacement for the factory unit, restoring proper cooling system pressurization and fluid expansion containment for the 1.3L Renesis engine.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock RX-8 Cooling System Vulnerability\u003c\/h3\u003e\n\u003cp\u003eThe factory coolant expansion tank on the SE3P RX-8 is notorious for premature failure due to continuous thermal cycling in the extremely hot 13B-MSP engine bay. Over time, the OEM plastic degrades, becoming brittle and prone to micro-fractures around the pressurized cap neck. Additionally, the factory coolant level sensor float frequently becomes porous and sinks, triggering a false low-coolant warning on the dash. Once tank integrity is compromised, the system loses pressure, leading to localized boiling, coolant loss, and severe overheating—a catastrophic scenario for rotary engine apex seals.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement overflow reservoir is manufactured to meet or exceed OEM specifications, utilizing high-density, heat-stabilized polypropylene to resist extreme temperatures. The structural design reinforces high-stress areas around the pressure cap and hose nipples, preventing the cracking seen in original units. Internally, the coolant level sensor mechanism provides accurate readings, eliminating persistent false dashboard warnings. By restoring a hermetically sealed cooling loop, this reservoir maintains the optimal system pressure required to raise the coolant's boiling point, ensuring the rotary operates safely within its narrow thermal limits.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2004-2011 Mazda RX-8\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e13B-MSP Renesis \/ SE3P\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e212-232 hp \/ 159 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2004 Mazda RX-8 1.3L\u003c\/li\u003e\n  \u003cli\u003e2005 Mazda RX-8 1.3L\u003c\/li\u003e\n  \u003cli\u003e2006 Mazda RX-8 1.3L\u003c\/li\u003e\n  \u003cli\u003e2007 Mazda RX-8 1.3L\u003c\/li\u003e\n  \u003cli\u003e2008 Mazda RX-8 1.3L\u003c\/li\u003e\n  \u003cli\u003e2009 Mazda RX-8 1.3L\u003c\/li\u003e\n  \u003cli\u003e2010 Mazda RX-8 1.3L\u003c\/li\u003e\n  \u003cli\u003e2011 Mazda RX-8 1.3L\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Mazda Rotary Caliber\u003c\/h3\u003e\n\u003cp\u003eBecause rotary engines are exceptionally sensitive to thermal management, maintaining cooling system integrity is paramount to preserving apex seal life, sustained high-RPM power delivery, and overall engine longevity.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48634964148472,"sku":"DS-EOQ92U1HD","price":189.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/radiator-coolant-overflow-tank-reservoir-mazda-rx-8-2004-2011-1.webp?v=1779913968","url":"https:\/\/performancechiptuning.com\/products\/radiator-coolant-overflow-tank-reservoir-mazda-rx-8-2004-2011","provider":"Performance Chip Tuning","version":"1.0","type":"link"}