Radiator Fan Motor BMW i3 I01 450W Engine Cooling Coolant Unit Fan 8641949

The BMW i3 I01 450W Radiator Fan Motor is an original cooling system component designed for the gasoline version of this model. It ensures stable, efficient airflow through the radiator, which translates to a safe operating temperature for the powertrain and protection for other components. Thanks to its factory BMW design, this used part remains perfectly integrated with the vehicle's engine bay architecture and electrical system.

Specifications and technical data

• SKU: 8642144-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8642144
• Substitutable numbers: 17428642144, 8642144, 17118678027, 8678027, 17427646081, 7646081, 17118672107, 8672107, 17117600520, 7600520, 7623684, 8641949, BG
• Fuel type: Petrol
• Category: Fan & Shroud Assemblies

Purpose and Role in the BMW i3 I01 Cooling System

The radiator fan motor in the BMW i3 I01 is responsible for actively cooling the coolant when natural airflow is insufficient – especially in city traffic, when stationary, and at high ambient temperatures. The 450W version is designed to:

• maintain a stable operating temperature for the gasoline engine,
• prevent the cooling system from overheating under heavy load,
• work in conjunction with the factory BMW electronic control system,
• reduce the risk of damage to seals, hoses, and the radiator.

This ensures that the cooling system operates predictably, and the powertrain maintains its performance over the long term.

Design and Vehicle Fitment

The presented fan motor belongs to the Fans and Fan Housings group, meaning it is an integral part of the assembly responsible for forced airflow through the radiator. The design was developed by BMW with the following in mind:

• precise fit with the fan frame and radiator in the BMW i3 I01,
• correct positioning relative to the airflow,
• compatibility with factory brackets and mounting points,
• maintenance of appropriate operating characteristics (rotational speed, airflow direction).

Its original BMW origin facilitates hassle-free installation and reduces the need for modifications to the wiring or mounting components.

Benefits of Using an Original Fan Motor

Using an original radiator fan motor in the BMW i3 I01 offers a range of practical operational benefits:

• Stable Cooling System Operation – the fan's proper performance helps maintain optimal coolant temperature.
• Enhanced Protection for the Gasoline Engine – reducing the risk of overheating contributes to the durability of seals, the cylinder head, and accessories.
• Compatibility with Factory Control – the motor works with temperature sensors and control modules, simplifying diagnostics.
• Lower Risk of Improper Installation – designed to fit the original fan housing and radiator.

This used part allows for economical cooling system repair while maintaining parameters close to factory specifications, which is particularly important for modern designs like the BMW i3 I01.

Operation in High-Temperature Conditions

In vehicles with gasoline engines, such as the BMW i3 I01, a functional fan motor is crucial during the summer months when the thermal load on the cooling system significantly increases. It is important to pay attention to:

• the fan's correct response to rising coolant temperatures,
• the absence of unusual noises during operation,
• stable RPMs during prolonged stationary periods in traffic.

To better understand how high temperatures affect the entire cooling system and when it is cost-effective to opt for used components, consult the guide Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings.

Expanding BMW Cooling System Service

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other parts from the same group, such as complete fan assemblies, housings, or additional fan modules, check the available parts in the BMW Fans and Fan Housings category.