{"product_id":"aluminum-coolant-expansion-tank-cap-for-bmw-e46-e36-e39-x3-e83-x5-e53-z4-e85-e86-318i-320i-323i-325i-328i-525i-528i-2-5i-3-0i","title":"Aluminum Coolant Expansion Tank Cap for BMW E36 E46 E39 X3 E83 X5 E53 Z4 E85\/E86 – CNC Billet Upgrade 1991-2006","description":"\u003cdiv\u003e\n\u003cp\u003eUpgrade your BMW’s cooling system with this precision-machined aluminum coolant expansion tank cap. Designed as a durable replacement for aging plastic caps, this billet upgrade provides improved longevity, enhanced temperature resistance, and a clean performance look under the hood. Perfect for preventative maintenance on older BMW platforms.\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIdeal maintenance upgrade for high-mileage or aging cooling systems.\u003c\/li\u003e\n\u003cli\u003ePrecision CNC-machined from high-quality T-6061 aluminum alloy.\u003c\/li\u003e\n\u003cli\u003eAnodized finish for corrosion resistance and a premium appearance.\u003c\/li\u003e\n\u003cli\u003eDirect replacement – installs in minutes with no modifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial: Billet aluminum alloy\u003c\/li\u003e\n\u003cli\u003eSurface: Anodized finish\u003c\/li\u003e\n\u003cli\u003eItem Type: Coolant expansion tank cap\u003c\/li\u003e\n\u003cli\u003eFitment Years: 1991–2006\u003c\/li\u003e\n\u003cli\u003eReference Part Numbers: 17111742231, 17110152374, 17111712492, 17111712669, 17117639022\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatible BMW Models\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e3 Series E36: 318i \/ 320i \/ 323i \/ 325i \/ 328i (1992–1998)\u003c\/li\u003e\n\u003cli\u003e3 Series E46: 316i \/ 318i \/ 320i \/ 323i \/ 325i \/ 328i \/ 330i (1999–2005)\u003c\/li\u003e\n\u003cli\u003e5 Series E39: 520i \/ 523i \/ 525i \/ 528i \/ 530i \/ 535i (1995–2004)\u003c\/li\u003e\n\u003cli\u003eX3 E83: 2.0i \/ 2.5i \/ 3.0i (2003–2006)\u003c\/li\u003e\n\u003cli\u003eX5 E53: 3.0i (2000–2006)\u003c\/li\u003e\n\u003cli\u003eZ4 E85\/E86: 2.2i \/ 2.5i \/ 3.0i (2003–2005)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePackage Includes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1x Aluminum coolant expansion tank cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEnsure the cooling system is depressurized before replacing the cap.\u003c\/li\u003e\n\u003cli\u003eDirect-fit design matches the factory neck size and thread profile.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGive your BMW a long-lasting cooling system upgrade with a premium aluminum cap engineered for reliability and performance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"K2 Industries","offers":[{"title":"Racing Red","offer_id":45754802897130,"sku":"1005008997021038-Racing Red","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Electric Blue","offer_id":46058540040426,"sku":"1005008997021038-Electric Blue","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0477\/0427\/7142\/files\/S2b652a5bf554498aaf56a3eb609db363l.webp?v=1775652738","url":"https:\/\/www.k2-industries.com\/en-au\/products\/aluminum-coolant-expansion-tank-cap-for-bmw-e46-e36-e39-x3-e83-x5-e53-z4-e85-e86-318i-320i-323i-325i-328i-525i-528i-2-5i-3-0i","provider":"K2 Industries","version":"1.0","type":"link"}