BMW i3 I01 Hybrid Electric Expansion Coolant Tank Radiator Fluid Bottle 9327150

The BMW i3 I01 Hybrid Coolant Expansion Tank is an original cooling system component designed for the hybrid BMW i3 I01 series models. Thanks to its factory design, it ensures proper coolant volume compensation and stable operating conditions for the electric-gasoline drivetrain, which translates to safe vehicle operation.

Specifications and technical data

• SKU: 9327150-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9327150
• Substitutable numbers: 9327150, 64129327150
• Category: Expansion & Overflow Tanks

Purpose and Function in the BMW i3 I01 Cooling System

The presented expansion tank is a component of the cooling system in the hybrid BMW i3 I01, responsible for maintaining the correct fluid level and compensating for pressure changes during the heating and cooling of the cooled units. A properly selected tank helps reduce the risk of overheating, air in the system, and uncontrolled leaks.

The original design dedicated to BMW allows for the preservation of factory connection geometry, which facilitates installation and ensures correct routing of cooling hoses within the vehicle's engine bay. This allows the system to maintain the performance and operational stability designed by the manufacturer.

Construction and Fit for BMW i3 Hybrid

As a part from the Expansion Tanks group, this component has been designed for specific mounting points and hose diameters used in the BMW i3 I01 Hybrid. This allows for:

• direct fit to factory brackets and supports,
• proper routing of coolant hoses,
• maintaining the correct working level of the coolant relative to the rest of the system.

The appropriately shaped tank housing supports proper system bleeding and stable coolant level readings, which is important for both diagnostics and daily servicing.

Characteristics of a Used Part

The offered tank comes from the secondary market, meaning it is a used part that retains the functionality required for further operation. This type of component is a good solution for operational repairs when the priority is to maintain the original BMW specifications while optimizing service costs.

Choosing an original, used expansion tank helps avoid problems typical of aftermarket replacements with imprecise fit, such as leaks at the hose connections, strain on hoses, or difficulties with installation in the tight space of the vehicle's engine bay.

Benefits of Using an Original BMW Expansion Tank

Using a dedicated expansion tank in the hybrid BMW i3 I01 offers a range of practical benefits:

• Factory Fit – maintaining the original cooling system geometry and mounting points.
• Stable System Operation – proper pressure and coolant level compensation under urban and non-urban driving conditions.
• Support for Component Durability – reducing the risk of overheating of hybrid drivetrain components and accessories.
• Easier Diagnostics – predictable cooling system behavior in line with manufacturer's specifications.

Selecting Other BMW Expansion Tanks

If you are planning a comprehensive repair or upgrade of the cooling system area in your BMW and need other parts from the same group, such as additional tanks, mounting elements, or caps, check the available parts in the BMW Expansion Tanks category.

To better plan service work on your car, including matching used components to the specific drivetrain, it is worth consulting the guide on diagnostics and selection of drivetrain components: Clutch and Dual-Mass Flywheel – Diagnostics and Part Selection for the Drivetrain.