Radiator Bottle/Expansion Tank 335 N55 2009-2011 (BMW 3 Series E90) is a vital component of the vehicle’s cooling system designed to manage coolant overflow and maintain proper pressure. This expansion tank accommodates the increasing and decreasing volume of coolant as the engine heats and cools, helping to prevent radiator damage and overheating issues.
This part is intended specifically for BMW 3 Series E90 models produced between 2009 and 2011, equipped with the 335 N55 engine variant. When replacing the expansion tank, compare the shape, mounting points, and hose connection positions with your existing tank to ensure compatibility. The condition of this radiator bottle directly impacts your cooling system’s efficiency and should be inspected for leaks or cracks regularly.
Using a properly matched radiator bottle supports effective coolant circulation and system pressure balance, which are key to maintaining engine temperature and avoiding overheating. Buyers should verify their vehicle’s year and engine type to confirm compatibility with this listing.
- Designed for BMW 3 Series E90 (2009-2011) with 335 N55 engine
- Part of the radiator system managing coolant overflow and pressure
- Check existing tank design to match hose and mounting fitment
If this repair may need matching clips, brackets, lights, panels or more than one part, check more Radiators, Quick Repair Bundle or Request a Part before ordering.