Fix BMW’s most notorious plastic coolant failure point before it leaves you stranded.
The factory plastic coolant expansion tank vent line on BMW E8x and E9x models is infamous for becoming extremely brittle over time. Due to intense engine bay heat cycles, the original plastic flange and hose crumble easily—both during routine maintenance and normal driving. A snapped hose leads to instant coolant loss and severe engine overheating.
The Bevinsee High-Performance Upgrade Kit eliminates this weak point permanently. Replacing the fragile OEM plastic with a CNC-machined 6061 billet aluminum flange and a triple-layer reinforced silicone hose, this kit delivers bulletproof reliability and an upgraded look under the hood.
Why this upgrade is essential for your BMW:
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6061 Billet Aluminum Flange: Replaces the failure-prone plastic fitting with a heavy-duty, anodized aluminum flange that will never crack or snap.
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Triple-Layer Reinforced Silicone: Engineered to withstand high pressure (up to 3 bar) and extreme temperatures. Formulated with an anti-aging compound to maintain flexibility without hardening or cracking.
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Upgraded Stainless Clamps Included: Fresh, high-torque hose clamps ensure a leak-free seal (since factory single-use clamps should never be reused).
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OEM+ Engine Bay Aesthetics: Replaces the cheap-looking factory plastic tube with a clean, high-end silicone line.
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Direct OEM Replacement: Matches original part numbers
17127618510&17127565093.
Technical Specifications:
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Brand: BEVINSEE
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Material: 6061 Anodized Aluminum Alloy & Triple-Layer Reinforced Silicone
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Placement: Radiator to Expansion Tank Vent Line
Compatibility:
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BMW 3-Series: E90 / E91 / E92 / E93 – 323i, 325i, 328i, 330i (2005–2012)
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BMW 1-Series (EUR): E81 130i, E82 125i, E87 130i, E88 125i (2005–2013 | N52 / N52N)
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BMW 1-Series (US): E82 / E88 – 128i (2006–2013 | N51 / N52N)
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BMW X1 (EUR): E84 – 25iX, 28iX (2009–2011 | N52)
Not sure which hardness to choose? View our Strongflex Color & Hardness Guide to find out which bushing suits your driving style and vehicle setup.