{"product_id":"bmw-full-metal-aluminum-expansion-tank-upgrade-reinforced-cooling-system-reliability-race-inspired-design-replaces-oe-part-no-17111707506","title":"BMW Full Metal Aluminum Expansion Tank Upgrade – Reinforced Cooling System Reliability, Race-Inspired Design - Replaces OE Part No. 17111707505","description":"\u003cp class=\"p1\"\u003e\u003cstrong\u003eUpgrade one of the most failure-prone parts of your BMW’s cooling system with a much stronger, more durable solution built for long-term reliability. This Full Metal Aluminum Expansion Tank is designed to replace the weak factory plastic unit with a reinforced all-metal design that is better suited for heat, pressure, and repeated thermal cycling.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFactory plastic expansion tanks are well known for becoming brittle over time. After years of engine heat and pressure changes, the original plastic can crack, warp, or fail without much warning, leading to coolant leaks, overheating, and unnecessary downtime. That risk becomes even more frustrating on older BMWs where certain cooling system parts are becoming harder to find in good quality.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThis upgraded aluminum expansion tank solves that problem by replacing the vulnerable plastic housing with a full metal construction that is far better equipped to handle demanding engine bay conditions. The result is a stronger, more confidence-inspiring cooling system component that not only looks more premium under the hood, but also helps reduce one of the common failure points found on aging BMW platforms.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFor enthusiasts restoring older chassis, maintaining a hard-to-find model, or simply looking to future-proof their cooling system, this is the type of upgrade that makes sense. Instead of installing another plastic replacement that may eventually suffer the same fate, this aluminum tank offers a more permanent, performance-inspired solution built around durability and peace of mind.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\n\u003cstrong\u003eFull Metal Aluminum Construction: \u003c\/strong\u003eReplaces the failure-prone factory plastic design with a far stronger aluminum housing built for long-term durability.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cstrong\u003eImproved Cooling System Reliability: \u003c\/strong\u003eHelps reduce the risk of cracks, leaks, and fatigue commonly associated with aging plastic expansion tanks.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cstrong\u003eBetter Resistance to Heat and Pressure: \u003c\/strong\u003eBuilt to withstand demanding engine bay temperatures and repeated thermal cycles more effectively than OEM-style plastic tanks.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cstrong\u003eIdeal for Older and Hard-to-Find Applications: \u003c\/strong\u003eA smart upgrade for BMWs where replacement cooling parts may be harder to source or where long-term dependability matters most.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cstrong\u003eRace-Inspired Under-Hood Design: \u003c\/strong\u003eAdds a cleaner, more serious performance look to the engine bay while serving a real functional purpose.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cstrong\u003eDirect Replacement Design: \u003c\/strong\u003eEngineered to replace the factory expansion tank while improving strength and overall confidence in the cooling system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eFITMENT:\u003c\/b\u003e BMW 3 Series – E30 (1984–1987) including\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e325e Coupe (1985–1987) – 2.7L M20 SOHC\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e325e Sedan (1984–1987) – 2.7L M20 SOHC\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e325 Coupe (1986–1987) – 2.7L M20 SOHC\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e325 Sedan (1986–1987) – 2.7L M20 SOHC\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e325es Coupe (1986–1987) – 2.7L M20 SOHC\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e325i Sedan (1987) – 2.5L M20 SOHC\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e325i Convertible (1987) – 2.5L M20 SOHC\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e325is Coupe (1987) – 2.5L M20 SOHC\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eFITMENT: \u003c\/b\u003eBMW 5 Series – E28 (1982–1988) including\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e528e Sedan (1982–1988) – 2.7L M20 SOHC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eCompatible with both RWD variants and equivalent factory applications using OE part number \u003cspan class=\"s1\"\u003e\u003cb\u003e17111707505\u003c\/b\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cb\u003eREPLACES OE PART NUMBER: \u003c\/b\u003e\u003cspan class=\"s2\"\u003e17111707505\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eIf you’re unsure whether this aluminum expansion tank fits your specific BMW, please contact us with your VIN and we’ll be happy to verify compatibility before you order.\u003c\/p\u003e","brand":"BAVMODS","offers":[{"title":"Default Title","offer_id":47310070481086,"sku":null,"price":206.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/8788\/1150\/files\/7_018e835f-4d49-4ed2-b717-0e6f924973f7.jpg?v=1779085456","url":"https:\/\/bavmods.com\/es\/products\/bmw-full-metal-aluminum-expansion-tank-upgrade-reinforced-cooling-system-reliability-race-inspired-design-replaces-oe-part-no-17111707506","provider":"BAVMODS®","version":"1.0","type":"link"}