BMW F20 F21 F30 F32 Radiator Expansion Tank Bottle 7642160

The BMW F20 F30 Coolant Expansion Tank is an original cooling system component from the Expansion Tanks category, designed for BMW F-series models. A used expansion tank ensures a factory fit, stable cooling system operation, and adherence to manufacturer-specified parameters. It's a practical solution for drivers seeking parts with a proven design and compatibility with factory equipment.

Specifications and technical data

• SKU: 7642160
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7642160
• Substitutable numbers: 7642160, 17137642160, 17137609468, 7609468
• Category: Expansion & Overflow Tanks

Purpose and Role in the Cooling System

The coolant expansion tank in BMW F-series vehicles is responsible for compensating for fluid volume changes during engine heating and cooling. A correctly chosen expansion tank:

• stabilizes pressure within the cooling system,
• allows for safe fluid level monitoring,
• reduces the risk of engine overheating,
• supports even fluid circulation throughout the system.

By maintaining the original geometry of its outlets and mounting points, the tank integrates seamlessly with BMW's factory coolant hoses and accessories.

Construction and Fitment for BMW F20 / F30

The BMW F20 F30 Coolant Expansion Tank is designed as an OEM part, meaning it offers a perfect fit for the factory mounting points in the engine bay. The tank's construction ensures:

• a properly shaped working chamber for coolant,
• suitability for operation under elevated temperature and pressure conditions,
• compatibility with the original cap and sensors specified for the particular equipment variant.

Its original origin translates to a precise fit with covers, hoses, and other cooling system components, eliminating the need for modifications.

Benefits of Using an Original Expansion Tank

Choosing a used, original BMW expansion tank is a solution that helps maintain cooling system performance parameters close to factory specifications. Key advantages include:

• factory fit – no issues with installation or hose compatibility,
• consistency with the BMW F-series cooling system design,
• an economical repair option in case of damage to the old tank,
• maintenance of proper fluid circulation and stable engine operating temperature.

This is particularly important in modern powertrains where the cooling system operates within strictly defined temperature and pressure ranges.

Product Condition and Service Application

The offered expansion tank comes from the used BMW parts segment, allowing for a cost-effective repair while maintaining original construction. It is suitable for both standard replacement of a worn-out component and repairs following cooling system failures, such as housing cracks or leaks.

Before installation, standard service procedures are recommended: system leak testing, coolant replacement according to manufacturer recommendations, and thorough bleeding after installing the new tank.

Other BMW Expansion Tanks and Guide Materials

If you are also looking for other BMW expansion tanks compatible with various models of this brand, check out the offer in the BMW expansion tanks category, where you will find a wide selection of cooling system components for many series and generations.

When selecting used vehicle components, it's advisable to follow proven guidelines. For brakes, a guide might be helpful: used braking systems – how to safely choose discs, calipers, and ABS, which shows what to look for when purchasing used parts from an automotive store.