BMW E81 E87 E90 E91 E92 Coolant Expansion Tank Bottle Petrol 7607482

Visual condition of the part

The product shows signs of use visible in the photos.

BMW E81 E87 E90 E91 E92 Coolant Expansion Tank Bottle is a factory-original cooling system component designed for BMW vehicles with petrol engines. It is responsible for maintaining a stable coolant level, proper venting, and safe engine operation across a wide temperature range. Thanks to its design, which complies with BMW standards, it ensures a perfect fit for mounts, hoses, and accessories in the engine bay.

Specifications and technical data

• SKU: 7607482
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7640514
• Substitutable numbers: 17137640514, 7640514, 17137607482, 7607482, 17137543026, 7543026, 17137567462, 7567462, 17137519368, 7519368, EM
• Fuel type: Petrol
• Category: Expansion & Overflow Tanks

Purpose and function in the cooling system

The presented expansion tank is a component of the cooling system in BMW E81, E87, E90, E91, and E92 series vehicles powered by petrol engines. Its task is to compensate for changes in coolant volume, maintain stable pressure, and allow for monitoring of the working fluid level. A properly functioning tank reduces the risk of engine overheating, supports uniform heat dissipation, and promotes longer engine life.

Thanks to a design tailored to the specific BMW generation, the tank works with factory connectors, hoses, and sensors, which facilitates installation and subsequent maintenance. This solution is particularly beneficial when replacing a worn or leaking component with a part that meets the original specifications.

Compatibility and technical parameters

The tank has been designed for BMW vehicles with petrol engines, which guarantees compatibility with the thermal and pressure characteristics of the cooling system in these units. The design provides for the appropriate placement of connection ports, mounting points, and sockets for accessories, which translates into secure seating in the engine bay and proper fluid circulation.

The component belongs to the Expansion tanks group, meaning it is dedicated to operating under conditions of variable temperature and pressure, while maintaining tightness and resistance to typical operational loads in BMW passenger cars.

Benefits of using an original BMW tank

Using an expansion tank that complies with factory BMW specifications allows for maintaining the cooling system performance characteristics designed by the manufacturer. Key advantages include:

• secure fit to factory mounts and hoses in the engine bay,
• stable cooling system operation in petrol engines,
• maintenance of the correct coolant operating pressure,
• easier diagnostics of potential leaks and fluid level drops.

For the user, this means more predictable operation, a lower risk of failures related to overheating, and the ability to service the vehicle in accordance with the manufacturer's recommendations. Choosing a part from the BMW OEM group also helps maintain the technical integrity of the entire system.

Condition, verification, and service application

The offered expansion tank is a used part, which makes it an attractive solution for maintenance repairs where a reasonable cost is a priority while maintaining compliance with the original design. This type of component is particularly useful in situations where the existing tank shows signs of wear, cracks, or leaks, and a quick and technically correct replacement is necessary.

Before installation, it is recommended to perform a standard check of the tightness, the condition of the ports and connection sockets, and to replace the coolant in accordance with the BMW service procedure. This approach allows you to fully utilize the potential of the part and restore the correct operating parameters of the cooling system.

BMW cooling system expansion and additional materials

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

For drivers interested in a broader look at the operation of premium segment cars and an economical approach to purchasing used parts, an article describing the selection of components and typical faults in popular models may be helpful. You can find more practical tips in the material: Used car parts for Mini Cooper – a way for style and savings.