Hose Expansion Tank To Radiator (135i 335i 20i N54) (BMW 1 Series E82/E88 / 3 Series E90 / X1 E84) is a mechanical radiator part designed to connect the expansion tank to the radiator in specific BMW models including the 1 Series (E82/E88), 3 Series (E90), and X1 (E84) with the N54 engine variants. This hose plays an essential role in the vehicle’s cooling system by allowing coolant flow between the expansion tank and radiator, helping to regulate engine temperature.
When replacing this hose, it is important to compare the old part carefully for matching length, diameter, and connection points to ensure compatibility with the mentioned BMW models and engines. The hose must fit securely to prevent coolant leaks that could lead to overheating or engine damage. Confirming this specific part number and vehicle fitment helps in making a confident purchase decision.
Typical buyers looking for this hose are servicing or repairing the cooling system of their BMW 135i, 335i, or 20i models equipped with the N54 engine. This part is categorized under radiators and is crucial for maintaining proper coolant circulation from the expansion tank to the radiator system.
- Designed for BMW 1 Series E82/E88, 3 Series E90, and X1 E84 models
- Connects the expansion tank with the radiator to manage coolant flow
- Check physical matches to the original hose before purchasing
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.





