{"product_id":"lunwag-coolant-reservoir-tank-with-cap-replacement-603-253-1k0121407a-for-audi-vw-2006-2019","title":"Lunwag Coolant Reservoir Tank with Cap — Replacement 603-253 \/ 1K0121407A for Audi VW (2006-2019)","description":"\u003cp\u003eIntroducing the Lunwag coolant reservoir tank with cap, a practical replacement designed for a long list of Audi and VW models from 2006 through 2019. Built from heat resistant plastic, it withstands engine heat and vibration while remaining semi translucent to help you gauge coolant levels at a glance.\u003c\/p\u003e\n\u003ch2\u003eKey advantages\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-Quality construction ensures durability under typical driving conditions and engine heat.\u003c\/li\u003e\n\u003cli\u003eTranslucent design allows quick monitoring of coolant levels without releasing the radiator cap.\u003c\/li\u003e\n\u003cli\u003eBroad compatibility covers Audi A3, Q3, TT, RS3 and several VW models such as Beetle, Golf GTI, Jetta, Passat, CC, Eos, and Rabbit. Always verify fitment by part number or vehicle filter.\u003c\/li\u003e\n\u003cli\u003eEssential cooling system component that helps prevent leaks and overheating, supporting reliable engine performance.\u003c\/li\u003e\n\u003cli\u003eEasy installation with a replacement reservoir and surge cap included, simplifying the replacement process.\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OE numbers 603-253 and 1K0121407A, ensuring a precise fit and reliable operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat you get and how it helps\u003c\/h2\u003e\n\u003cp\u003eThe Lunwag reservoir serves as a critical part of the cooling system, storing excess coolant and allowing it to circulate as temperatures rise. A well-sealed reservoir helps maintain pressure and coolant levels, reducing the risk of low coolant conditions on hot days or during spirited driving.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor coolant visually and top up when needed using the translucent body.\u003c\/li\u003e\n\u003cli\u003eReplace a worn or leaking tank with a direct OE match for consistent performance.\u003c\/li\u003e\n\u003cli\u003eCap and surge cap included to restore a complete cooling circuit and cap pressure management.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation and fitment guidance\u003c\/h2\u003e\n\u003cp\u003eBefore purchase, consult the full vehicle list in the description to confirm compatibility. This reservoir is designed as a straightforward direct replacement on eligible Audi and VW models, making it suitable for DIY replacements or professional service.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which vehicles are compatible with the Lunwag coolant reservoir tank with cap?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Compatible with Audi and VW models from 2006 to 2019; confirm fitment by part number.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What practical benefits does replacing the coolant reservoir offer?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Helps minimize coolant leaks and loss while enabling easy level monitoring for reliable cooling.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Lunwag","offers":[{"title":"Default Title","offer_id":42465053114453,"sku":"B0DZ2G4DBL","price":45.12,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/lunwag-coolant-reservoir-tank-cap-audi-a3-2006-2016.jpg?v=1777996909","url":"https:\/\/plentytorque.co.uk\/products\/lunwag-coolant-reservoir-tank-with-cap-replacement-603-253-1k0121407a-for-audi-vw-2006-2019","provider":"PlentyTorque","version":"1.0","type":"link"}