BMW F70 F74 F78 U06 X1 U11 B48 Water Coolant External Radiator Cooler 9847023

Visual condition of the part

The product shows signs of use visible in the photos.

BMW F70 F74 F78 U06 X1 U11 B48 Water Coolant External Radiator Cooler is an original cooling system component from the Water radiators group, designed for modern BMW models with the B48 engine. Designed by the vehicle manufacturer, this radiator ensures stable engine heat dissipation, supporting safe, predictable, and economical operation of the powertrain. It is a solution for users seeking factory-fit quality and a proven design within a reasonable budget.

Specifications and technical data

• SKU: 9847023
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9847023
• Substitutable numbers: 9847023, 17119847023
• Part type: Radiator
• Category: Radiators

Purpose and compatibility with BMW models

The presented water coolant radiator has been developed for BMW F70, F74, F78, U06, and X1 U11 series vehicles with the B48 engine. This ensures the retention of factory geometry, mounting points, and connections, which translates into secure seating in the front frame and proper routing of cooling system hoses. As a result, installation is straightforward, without the need for modifications or compromise solutions.

The original BMW origin helps maintain the proper thermal characteristics of the entire system – from the coolant pump and thermostat to the fan and electronic controls. This is particularly important in modern B48 units, where a stable operating temperature affects performance, fuel consumption, and component durability.

Construction and function in the cooling system

The radiator belongs to the Water radiators group, which are components responsible for heat exchange between the coolant and the air flowing over the front of the vehicle. The design features a dense network of channels and fins, enabling efficient heat energy dissipation even under high engine load, highway driving, or in city traffic conditions.

In practice, a correctly selected radiator:

• stabilizes the operating temperature of the B48 unit across a wide range of loads,
• reduces the risk of overheating during hot weather and intensive use,
• supports the proper operation of auxiliary systems (air conditioning, fan control, exhaust emission systems).

By maintaining the factory design, the coolant flow remains consistent with the manufacturer's specifications, which is crucial for uniform cooling of the engine block, cylinder head, and accessories.

Characteristics of the used component

The offered radiator is a used component, which allows for lower repair costs while maintaining the original BMW specification. This type of solution is often chosen for post-accident repairs, replacement after leaks, or for preventive cooling system upgrades in vehicles under intensive use.

Choosing a used OEM radiator is a compromise between price and maintaining the factory design – key factors are the correct mounting points, appropriate heat capacity, and compatibility with accessories (fan, housings, hoses). This allows for restoring the proper operation of the cooling system without interfering with the vehicle's construction.

Practical application and benefits of installation

Replacing the coolant radiator in BMW F70, F74, F78, U06, and X1 U11 models with the B48 engine is particularly recommended when symptoms such as a drop in coolant level, engine overheating, visible mechanical damage to the front of the vehicle, or corrosion of heat exchange elements appear. Installing the presented component allows you to:

• restore proper circulation and coolant cooling throughout the system,
• increase the safety of the powertrain operation in high ambient temperatures,
• reduce the risk of costly failures resulting from overheating (head gasket, deformation of aluminum components),
• maintain compliance with the vehicle manufacturer's factory specifications.

For workshops and individual users, this means predictable installation without the need to adapt universal replacements, as well as easier diagnostics of potential future faults.

Technical support and additional materials

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 expansion tanks, check the available parts in the BMW Water radiators category.

To better understand how high temperatures affect the cooling system and why used components can be a reasonable economic choice, it is worth reading the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings. This is a practical addition to your knowledge when planning repairs or upgrades to the cooling system in your BMW.