{"product_id":"rein-ept0137-engine-coolant-reservoir","title":"Rein EPT0137 Engine Coolant Reservoir","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe Rein EPT0137 engine coolant reservoir is a standard replacement expansion tank built for OE-style fitment and function. It is made for applications that require a reservoir without a cap and is suited for Audi and Volkswagen cooling system service.\u003c\/p\u003e\u003cp\u003eRein uses virgin plastic rather than regrind material to help resist cracking from repeated heat cycles and maintain durability over time. This part cross-references Genuine 8D0121403L for the same application.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStandard replacement engine coolant reservoir\u003c\/li\u003e\n\u003cli\u003eVirgin plastic construction for improved durability\u003c\/li\u003e\n\u003cli\u003eOE-quality design for proper fit and function\u003c\/li\u003e\n\u003cli\u003eCap not included\u003c\/li\u003e\n\u003cli\u003eBuilt for cooling system service on Audi and Volkswagen applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThe Rein EPT0137 coolant reservoir is engineered as an OE-quality expansion tank for vehicles that need a direct-style replacement reservoir without a cap. Its construction uses virgin plastic to match or exceed original material standards and reduce the risk of cracking caused by thermal cycling. For buyers searching for an Audi A4 coolant reservoir, Audi A6 expansion tank, or Volkswagen Passat coolant reservoir, this part number provides a focused replacement option. The EPT0137 is also referenced by Genuine 8D0121403L.\u003c\/p\u003e\u003ch2\u003eCommon Issues It May Solve\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCracked or leaking coolant reservoir housing\u003c\/li\u003e\n\u003cli\u003eCoolant loss from a damaged expansion tank\u003c\/li\u003e\n\u003cli\u003eHeat-related plastic deterioration\u003c\/li\u003e\n\u003cli\u003eReplacement needs after reservoir failure during routine cooling system repair\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the vehicle application and note that this reservoir is listed without a cap. Confirm the existing reservoir configuration before installation, especially on 1998 Audi A4 and A4 Quattro applications with the specified VIN break. Match the part number EPT0137 to the required cooling system setup before service.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eRein positions this expansion tank as an OE-quality replacement built to fit and perform as the original manufacturer intended. The EPT0137 is produced from virgin plastic to support long-term durability in heat-cycled cooling system environments.\u003c\/p\u003e","brand":"Rein","offers":[{"title":"Default Title","offer_id":53429459583157,"sku":"DFBS-EPT0137","price":38.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/C8_EPT0137_FRO.jpg?v=1791182836","url":"https:\/\/www.partcatalog.com\/products\/rein-ept0137-engine-coolant-reservoir","provider":"PartCatalog","version":"1.0","type":"link"}