{"product_id":"a-premium-engine-coolant-overflow-recovery-reservoir-tank-for-bmw-e46-e83-e53-2-2-3-0l-with-sensor-30-psi-cap","title":"A-Premium Engine Coolant Overflow Recovery Reservoir Tank for BMW E46\/E83\/E53 2.2–3.0L — With Sensor \u0026 30 PSI Cap","description":"\u003cp\u003e\u003cstrong\u003eThe A-Premium Engine Coolant Overflow Recovery Reservoir Tank is a direct-fit replacement reservoir with sensor and pressure cap engineered to restore proper coolant expansion and monitoring for compatible BMW models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis replacement coolant overflow tank is molded from heat-resistant PA plastic and comes complete with a spring-loaded twist cap, pressure rating to 30 PSI, mounting hardware and an integrated sensor. It matches factory dimensions for many E46, X3 and X5 engines (2.2–3.0L DOHC 6-cylinder variants) and carries multiple reference numbers for easy cross-reference. The unit is packaged to simplify installation and backed by a one-year unlimited-mileage warranty for buyer confidence.\u003c\/p\u003e\n\n\u003ch3\u003eWill this reservoir fit my BMW E46, X3 or X5?\u003c\/h3\u003e\n\u003cp\u003eCompatibility covers a range of late-1990s to mid-2000s BMW 6-cylinder models. Verify your model year and engine size against the listed fitment to ensure a match. The part replaces several OEM reference numbers, easing lookup for spare parts catalogs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits E46 320i, 323Ci\/323i, 325Ci\/325i\/325xi, 328Ci\/328i, 330Ci\/330i\/330xi (1999–2006, 2.2–3.0L)\u003c\/li\u003e\n  \u003cli\u003eFits E83 X3 (2004–2010) 2.5L\/3.0L and E53 X5 (2001–2006) 3.0L\u003c\/li\u003e\n  \u003cli\u003eCross-references: 17137787039, 17111436413, 17117573781, 17132247553, 603-535\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this tank handle heat and pressure under normal driving?\u003c\/h3\u003e\n\u003cp\u003eThe reservoir is built from durable PA plastic chosen for thermal resistance and vibration tolerance, and the supplied cap is spring-loaded with a maximum pressure rating of 30 PSI. That combination helps the cooling system maintain correct pressure and allows safe expansion and recovery of coolant during engine temperature changes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterial: heat-resistant PA plastic for long-term durability\u003c\/li\u003e\n  \u003cli\u003eCap: spring-loaded twist design, rated to 30 PSI\u003c\/li\u003e\n  \u003cli\u003ePressurized design supports coolant expansion and return cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the box and what are the physical dimensions?\u003c\/h3\u003e\n\u003cp\u003eThis kit ships with the reservoir tank, a compatible sensor, a radiator cap, and a clamp for secure hose connection — ready for direct installation. The package dimensions reflect factory equivalence to ensure proper fit in the original mounting location.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncluded: 1 tank, 1 sensor, 1 cap, 1 clamp\u003c\/li\u003e\n  \u003cli\u003eMounting holes: 1; Height 359.7 mm, Length 121.3 mm, Width 133.4 mm\u003c\/li\u003e\n  \u003cli\u003eConstructed to OEM-style mounting points and hose fittings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill replacing the reservoir affect engine performance or emissions?\u003c\/h3\u003e\n\u003cp\u003eReplacing a cracked, leaking or non-sealing reservoir restores the closed cooling system’s ability to maintain correct coolant levels and pressure. While it doesn’t change engine tuning, a sound reservoir helps prevent coolant loss and overheating events that can indirectly affect efficiency and emissions over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores correct coolant recovery and reduces risk of fluid loss\u003c\/li\u003e\n  \u003cli\u003eHelps maintain system pressure for consistent engine temperature control\u003c\/li\u003e\n  \u003cli\u003eSupports sensor function for accurate coolant-level monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: the A-Premium reservoir kit is aimed at BMW owners, independent mechanics and restoration specialists working on E46 series sedans\/coupes and early X3\/X5 SUVs with 6-cylinder engines who need a reliable, OE-style replacement. It's ideal for vehicles showing coolant leaks, cracked tanks, faulty sensor readings or missing\/broken caps, and for anyone restoring the cooling system to proper working order without modifying factory mounting or plumbing.\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: Does this reservoir include the coolant level sensor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — this A-Premium kit includes the reservoir with the integrated sensor, cap and clamp for a complete replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What pressure cap is included with the tank?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The supplied spring-loaded twist cap is rated to 30 PSI, matching common OEM pressure specifications.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"A-Premium","offers":[{"title":"Default Title","offer_id":48083015565470,"sku":"B07TJQNBRN","price":60.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/a-premium-reservoir-front-view_f5f48706-2064-4136-bf7d-23eb735d3a81.jpg?v=1785822676","url":"https:\/\/northtrailauto.ca\/products\/a-premium-engine-coolant-overflow-recovery-reservoir-tank-for-bmw-e46-e83-e53-2-2-3-0l-with-sensor-30-psi-cap","provider":"North Trail Auto","version":"1.0","type":"link"}