BMW E9X/E8X N55 Aluminum Expansion Tank Kits

Most modern BMWs are notorious for their cooling system issues, often leaving owners stranded or causing irreversible engine damage in the event of failure. The coolant expansion tank is at the heart of these issues-a crucial component responsible for holding hot engine coolant under high pressure. Unfortunately, BMW manufactured the factory N55 expansion tanks out of plastic. After years of exposure to high temperatures and chemical-laden antifreeze, the plastic degrades, eventually weakening enough to rupture.

With this failure in mind, Turner's team of BMW enthusiasts set out to develop the ultimate solution for E8X/E9X N55 owners: a robust expansion tank built to last! Constructed from durable 5052 TIG-welded aluminum, this tank withstands high temperatures and pressures without deteriorating over time. Unlike the OEM molded plastic tank, Turner's alternative is not prone to cracking, leaking, or weakening. With Turner's Heavy Duty Aluminum Expansion Tank Kit, you'll never experience expansion tank failure again!