{"product_id":"genuine-bentley-expansion-tank-4m0121405ag","title":"Genuine Bentley Expansion Tank 4M0121405AG","description":"\u003cdiv class=\"flex flex-col text-sm\"\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:6890e68c-a1ac-454e-ba62-fd028bb9db0a-47\" data-testid=\"conversation-turn-96\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"954af521-c2b9-4d30-aadc-c0ea28b74d92\" dir=\"auto\" data-message-model-slug=\"gpt-5-3\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003ch2 data-start=\"0\" data-end=\"73\"\u003eShop Now Genuine Bentley Expansion Tank Online – Bentley Part 4M0121405AG\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cspan\u003eGenuine Bentley Expansion Tank 4M0121405AG\u003c\/span\u003e\u003cspan\u003e stores excess coolant as temperatures fluctuate. This reservoir accommodates fluid expansion during heating. Your cooling system requires this for proper function.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe tank connects to the main cooling circuit through hoses. When fluid heats and expands, overflow goes here. As temperatures drop, the vacuum draws fluid back.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eTranslucent construction lets you verify fluid levels visually. Moulded minimum and maximum markings show proper fill range. You check levels without opening anything.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eHeat-resistant plastic withstands underhood temperatures without warping. The material resists antifreeze chemical attack. Cheap tanks crack and leak from thermal stress.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe cap opening accommodates the pressure-regulating cap. Smooth threads ensure proper sealing without leaks. Damaged threads prevent the cap from sealing correctly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eYou receive the exact tank Bentley specified for your vehicle. It holds adequate capacity for your cooling system volume. Everything functions as designed without overflow.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eOrder from Europeanautospares for genuine Bentley components with dependable worldwide shipping.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\n\u003cspan\u003eSpecifications\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e\u003cspan\u003e: Bentley\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cspan\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e: 4M0121405AG\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e\u003cspan\u003e: Expansion Tank (Coolant Reservoir)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003cspan\u003e: heat-resistant plastic\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e\u003cspan\u003e: Cooling system\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cstrong\u003eCondition\u003c\/strong\u003e\u003cspan\u003e: Brand New, Genuine \u003c\/span\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eWhy Choose European Auto Spares\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eAdequate Capacity\u003c\/strong\u003e:\u003c\/span\u003e\u003cspan\u003e This tank holds sufficient volume for thermal expansion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eVisual Monitoring\u003c\/strong\u003e:\u003c\/span\u003e\u003cspan\u003e A translucent material allows easy level verification.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eHeat Resistant:\u003c\/strong\u003e\u003cspan\u003e Plastic withstands underhood temperatures without warping.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eChemical Resistant:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e \u003c\/strong\u003eMaterial resists attack by antifreeze and deterioration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWorldwide Fast Shipping:\u003c\/strong\u003e\u003cspan\u003e We deliver authentic components to you rapidly.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eNeed Help Finding the Right Bentley Part?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eOur cooling specialists help you identify the correct tank for your vehicle. Contact Europeanautospares with your vehicle information to verify the precise part today.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe confirm compatibility before processing your request. Your tank arrives in authentic packaging, ready to install. Professional assistance is available anytime you require it.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eKeep Your Bentley Cooling Contained\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eCracked tanks leak coolant that causes overheating. Replace damaged units with the Genuine Bentley Expansion Tank 4M0121405AG now.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThis authentic tank restores proper fluid storage to factory standards. Order today from Europeanautospares and maintain cooling capacity.\u003c\/span\u003e\u003c\/p\u003e","brand":"European Autospares Trading LLC","offers":[{"title":"Original \/ Bentley \/ 4M0121405AG","offer_id":47870909579504,"sku":"4M0121405AG","price":486.0,"currency_code":"AED","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/0546\/2512\/files\/European_Autospares_Logo...png?v=1774964489","url":"https:\/\/europeanautospares.com\/de\/products\/genuine-bentley-expansion-tank-4m0121405ag","provider":"European Autospares Trading LLC","version":"1.0","type":"link"}