Still trusting plastic under pressure? If you’ve owned a BMW with an N20, N52, or N54 engine, you already know the expansion tank is a known failure point. Over time, the plastic degrades from heat cycles and pressure, leading to cracks, leaks, and unexpected breakdowns. That’s why we developed this Heavy-Duty Aluminum Expansion Tank Kit, a direct-fit solution designed to eliminate the issue permanently. Constructed from TIG-welded aluminum, this tank resists the heat and pressure that caused your OEM plastic tanks to fail. It retains the factory cap for easy serviceability and includes all hardware for a clean, bolt-on installation. Search T12806793 or visit the link to upgrade to a permanent solution, engineered to outlast your engine. #turner #turnermotorsport #tms #bmw #bmwn20 #n52 #n54 #bmwn54 #bmwn52