BMW G20 G22 G23 G26 Water Coolant Radiator Cooling Unit 8666748

BMW G20 G22 G23 G26 Water Coolant Radiator Cooling Unit is an original cooling system component designed for efficient heat dissipation from the engine in modern 3 and 4 series models. Thanks to the factory BMW design and precise fitment for the G20/G22/G23/G26 platform, this used radiator ensures stable system operating parameters and serves as a practical solution for post-accident repairs or cooling system maintenance. Choosing an original water radiator helps maintain the proper thermal characteristics of the powertrain and reduces the risk of overheating.

Specifications and technical data

• SKU: 8666748
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8666748
• Substitutable numbers: 8666748, 17118666748, 5A54049, 17115A54049
• Category: Radiators

Purpose and function in the BMW cooling system

The presented water radiator is a component of the cooling system responsible for heat exchange between the coolant and the air flowing around the front of the vehicle. In BMW G20, G22, G23, and G26 models, its proper operation is crucial for:

• maintaining a stable engine operating temperature across a wide range of loads,
• protecting the powertrain from overheating in city traffic and on the highway,
• working in conjunction with the control electronics that monitor coolant temperature.

Thanks to a design consistent with factory BMW standards, the radiator works with original hoses, sensors, and the fan shroud, which facilitates installation and limits the need for additional modifications.

Benefits of using an original BMW water radiator

Using an original water radiator in the G20/G22/G23/G26 series translates into a number of practical operational benefits:

• Factory fitment – maintaining the proper coolant flow and adequate heat exchange surface.
• Cooling system consistency – compatibility with factory brackets, mounts, and front-end accessories.
• Stable engine operation – reduction of temperature fluctuations, which promotes the durability of the powertrain and accessories.
• Possibility of economical repair – a used OEM component allows for lower service costs while maintaining the design intended by the manufacturer.

This solution is particularly recommended for repairs after a front-end collision or when replacing a worn-out radiator, where the priority is to maintain the original operating characteristics of the cooling system.

Condition, origin, and installation aspects

The offered BMW water radiator comes from dismantling and is sold as a used part, which allows for combining reasonable cost with the preservation of the original design. This type of component is intended for installation in place of the factory radiator, using standard mounting points and the existing front panel structure.

Before installation, a standard service procedure is recommended: checking the system for leaks, replacing the coolant with fresh fluid, and bleeding the system according to the BMW procedure. This approach increases operational safety and allows for fully utilizing the potential of the installed radiator.

Technical support and additional information

To better understand the impact of a functional radiator on powertrain durability and the symptoms of overheating, it is worth checking out the guide on our blog: Engine cooling system – overheating, repair, and used radiators. The article discusses practical aspects of diagnostics and operation of the cooling system in popular models, including BMW.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional radiators, coolant hoses, or mounting elements, check the available parts in the BMW water radiators category.