BMW Z4 E85 E86 Coolant Expansion Tank Radiator Petrol 7573751

The BMW Z4 E85 E86 Expansion Tank 7573751 is an original cooling system component designed for BMW Z4 E85 and E86 models with petrol engines. This used expansion tank from the Covers category helps maintain the system's factory operating characteristics and proper coolant overflow management. It's a solution for drivers seeking a proven part with parameters matching factory equipment.

Specifications and technical data

• SKU: 7573751
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7573751
• Substitutable numbers: 7573751, 17117573751, 7514401, 17137514401
• Fuel type: Petrol
• Category: Caps

Purpose and Fitment for BMW Z4 E85/E86

The presented expansion tank has been specifically designed for the engine bay construction of the BMW Z4 E85 and E86, ensuring correct hose routing and stable mounting. This guarantees compatibility with the factory cooling system, eliminating the need for modifications or adaptations.

As a BMW branded part, it is tailored for operation under conditions typical for petrol engines, considering their thermal characteristics and operating pressures within the cooling system.

Technical and Functional Characteristics

The expansion tank is responsible for compensating for changes in coolant volume and maintaining stable system pressure. A correctly selected component:

• prevents coolant overflow at high engine operating temperatures,
• allows for easy coolant level checks,
• supports uniform engine cooling,
• reduces the risk of engine overheating under heavy load.

By retaining its original geometry and connections, the tank integrates seamlessly with factory cooling system hoses and accessories, simplifying installation and subsequent operation.

Condition, Origin, and Benefits of Choosing a Used Part

This part is from a dismantled vehicle and is offered as a used BMW expansion tank. Such a part allows for economical repair of the cooling system while maintaining the original manufacturer's specifications. Compared to low-cost aftermarket alternatives, an original used component often better fits the vehicle's design requirements.

Choosing a used expansion tank is particularly beneficial for maintenance repairs where preserving factory fitment and reducing service costs are priorities, while ensuring the cooling system operates correctly.

Compatibility with Petrol Engine Fuel and Cooling Systems

In petrol-powered BMW Z4 E85/E86 models, the cooling system is crucial for stable engine operation, especially during dynamic driving. A functional expansion tank:

• supports maintaining optimal operating temperature for the petrol engine,
• indirectly affects the durability of fuel system and ignition components,
• reduces the risk of localized overheating, which can accelerate component wear.

For users interested in a broader context of petrol vehicle systems, including selecting parts by OEM numbers, an article describing the diagnostics and operation of fuel supply components may be useful: fuel system – injectors, pumps, and fuel tank.

Alternative BMW Covers and Cooling System Development

If you are looking for other parts from the BMW Covers category compatible with your model, check out the BMW Covers available in our store to complete your body and engine bay accessories in line with factory manufacturer standards.

Summary

The BMW Z4 E85 E86 Expansion Tank 7573751 is an original, used cooling system component for BMW Z4 petrol cars. It ensures proper integration with factory accessories, stable cooling system operating parameters, and allows for economical repairs while maintaining manufacturer specifications. It's a practical choice for drivers who want to restore cooling system functionality without compromising the original BMW design.