BMW 1 3 4 Series F20 F21 F30 F32 Radiator Expansion Tank Bottle Petrol 7642158

BMW F20 F21 F30 F32 Expansion Tank 7642158 is an original cooling system component from the expansion tanks category, designed for BMW cars with gasoline engines. A used, factory expansion tank ensures proper cooling system operation, stabilizing fluid levels and supporting safe engine conditions. It's a practical solution for drivers seeking OEM parts with a proven design.

Specifications and technical data

• SKU: 7642158
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7642158
• Substitutable numbers: 17137642159, 7642159, 171376421587642158, 17137609469, 7609469, 17137642158, 7642158
• Fuel type: Petrol
• Category: Expansion & Overflow Tanks

Purpose and Role in the Cooling System

The presented expansion tank is a component of the cooling system in BMW F-series models, responsible for compensating for changes in coolant volume and maintaining stable operating pressure. Thanks to its appropriately designed body geometry and connection spigots, it works with hoses and the radiator, enabling proper fluid circulation in gasoline engines.

Using an original expansion tank is crucial for:

• maintaining the correct coolant level across the entire operating temperature range,
• preventing air ingress into the cooling system,
• stabilizing engine thermal conditions, which contributes to its durability.

Benefits of Using an Original BMW Expansion Tank

The original BMW expansion tank is designed for specific F-series models, ensuring a precise fit with factory mounting points and hose routing. This allows for an organized installation without the need for modifications or additional adapters. The OEM design preserves the original cooling system operating parameters, which is particularly important in modern, high-density power gasoline engines.

The main advantages of using this component include:

• compatibility with the factory cooling system in BMW F-series vehicles with gasoline engines,
• maintaining original pressure and fluid circulation characteristics,
• consistency with other system components, such as hoses, the radiator, and the pressure cap.

Performance Characteristics and Installation

As a component from the expansion tanks category, this model has been developed for operation in variable thermal and pressure conditions typical for gasoline engines. The body material is adapted for contact with coolant and for long-term exposure to the system's operating temperature. The used condition of the part means it has been previously operated, which should be considered when planning a full cooling system inspection.

During installation, it is recommended to:

• check the condition of hoses and clamps connected to the tank,
• bleed the cooling system after replacement,
• check for leaks after the first engine heating and cooling cycle.

Application in BMW Gasoline Vehicles

The presented expansion tank is intended for BMW cars powered by gasoline fuel, which is important when selecting parts for a specific engine version. Cooling systems in gasoline engines differ from solutions used in diesel engines, so choosing a component compatible with the fuel type is essential for the proper operation of the entire system.

If you have doubts about compatibility with a specific engine version, it is advisable to verify the designations in the vehicle's service documentation or consult a mechanic specializing in the BMW brand to ensure correct component fitment.

Alternative Part Numbers and Identification

The expansion tank discussed has an assigned OEM part number and associated interchangeable numbers, which facilitates identification in service catalogs and parts selection systems. This allows for precise matching of the component to a specific vehicle equipment variant and year, without the risk of using an incorrect substitute.

Searching by manufacturer designations, reference numbers, or warehouse identifiers allows for quick verification of the tank's compatibility with a given BMW model, which is particularly useful in professional workshops and automotive stores.

Related Products and Technical Knowledge

If you are looking for other BMW expansion tanks compatible with different models of this brand, check out the BMW expansion tanks available in our assortment to select the element appropriate for your specific vehicle configuration.

When planning service work related to the cooling system and interior thermal comfort, it is also worth familiarizing yourself with practical tips on selecting and operating components. The article Air Conditioning and Heating – Part Selection and Maintenance for Year-Round Comfort may be helpful, as it discusses principles for selecting used OEM parts, service procedures, and common driver questions.

Summary

BMW F20 F21 F30 F32 Expansion Tank 7642158 is a factory cooling system component designed for BMW cars with gasoline engines, which helps maintain proper engine operating parameters. Choosing an original expansion tank supports engine thermal stability, improves operational safety, and facilitates installation due to its fit with factory mounting points and hoses.