{"product_id":"wce-s63-tu4-billet-coolant-reservoir-expansion-tank-f90-m5-f92-m8","title":"WCE S63 TU4 Billet Coolant Reservoir Expansion Tank - F90 M5 \/ F92 M8","description":"\u003c!-- WCE S63 TU4 Billet Coolant Reservoir — Shopify Product Description --\u003e\u003c!-- Paste this into the HTML editor of your Shopify product description field --\u003e\n\u003cdiv class=\"wce-pd\"\u003e\n\u003c!-- Badges --\u003e\n\u003cdiv class=\"wce-badges\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp dir=\"ltr\" class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWCE S63TU4 Billet Coolant Reservoir Expansion Tank — F90 M5 \/ F92 M8\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp dir=\"ltr\" class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe OEM plastic expansion tank on the S63TU4 is a known failure point. It cracks, and when it does it dumps coolant straight down onto the injectors and coils — which turns a cheap part into an expensive weekend. Swapping in another factory plastic unit just resets the clock on the same failure. This one doesn't fail.\u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"font-claude-response-body break-words whitespace-normal\"\u003eMachined from 6061 billet aluminum, the WCE reservoir is a permanent fix rather than a replacement interval. Every factory interface is retained — quick-connect fittings, OEM pressure cap, and the stock coolant level sensor — so the car sees exactly what it expects. No warning lights, no phantom level readings, no adapters or splicing.\u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eHighlights\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\" dir=\"ltr\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e6061 billet aluminum, CNC machined\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003ePermanently eliminates OEM plastic reservoir cracking and coolant leaks\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAll OEM quick-connect fittings retained — no modification to hoses or lines\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOEM pressure cap retained, factory pressure relief preserved\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOEM coolant level sensor retained for accurate readings and no dash lights\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003ePlug and play — no cutting, drilling, or tuning required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\" class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\" dir=\"ltr\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003e\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaterial\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e6061 Billet Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eManufacturing\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCNC Machined \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEngine\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eS63TU4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCap\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOEM Retained (pressure-rated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSensor\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOEM Coolant Level Sensor (reused from stock unit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eInstallation\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePlug \u0026amp; Play — No Modifications Required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eIncluded\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBillet Reservoir\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp dir=\"ltr\" class=\"font-claude-response-body break-words whitespace-normal\"\u003e \u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" class=\"font-claude-response-body break-words whitespace-normal\"\u003eTransfer the OEM coolant level sensor probe and the factory coolant cap from your original reservoir — both are reused on this unit. The cap does not need to line up with the arrows; tighten until snug. The sensor probe occasionally binds on removal; trimming around its base is sometimes necessary to pull it cleanly. Reservoir only — sensor and cap are not included. Sensor and O-Ring reused from stock unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"West Coast Euros","offers":[{"title":"Full Silver Billet","offer_id":52717906493714,"sku":"F9x-BLT-CT-1","price":1099.0,"currency_code":"USD","in_stock":true},{"title":"Black Top Billet","offer_id":52717906526482,"sku":"F9x-BLT-CT-2","price":1099.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/5699\/7138\/files\/west-coast-euros-performance-full-silver-billet-wce-s63-tu4-billet-coolant-reservoir-expansion-tank-f90-m5-f92-m8-1234317088.png?v=1789770653","url":"https:\/\/www.legendaryautobuilders.com\/products\/wce-s63-tu4-billet-coolant-reservoir-expansion-tank-f90-m5-f92-m8","provider":"The LAB","version":"1.0","type":"link"}