The expansion tank in your BMW is known for failing, so with that in mind, ECS Tuning has created a kit to make your life a little easier. We utilized only genuine BMW components including the tank, cap, cap gasket, coolant, and even the hose from the tank.
The S54 coolant vent line can be a weak point as these cars age, the plastic design can become brittle of hot and cold cycles under the engine bay. When you upgrade to the ECS kit you get a custom billet fitting and a flexible yet formed silicone hose to survive the heat cycles and engine vibrations. There's no reason to let your stock line leave you on the side of the road, upgrade now before the factory line gives out.
