BMW 1 3 Series E87 E90 Diesel Engine Radiator Cooling Fan Motor Relay 600W

BMW 1 3 Series E87 E90 Diesel Engine Radiator Cooling Fan Motor Relay 600W is an original cooling system component designed for front-vehicle installation. It ensures stable heat dissipation from the radiator, which translates into a safe operating temperature for the power unit and proper cooperation with diesel engine accessories. Thanks to the use of a powerful 600W electric motor, this assembly with a relay is suitable for vehicles with higher thermal loads.

Specifications and technical data

• SKU: 7801647-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7801647
• Substitutable numbers: 17427801647, 7801647, 17427788907, 7788907, 6943705, 3137229013, 1137328118, EM, 17425A3F108, 4253108
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Caps

Purpose and function in the cooling system

The presented radiator fan is dedicated to BMW 1 and 3 Series diesel models, where it is responsible for forced airflow through the radiator located in the front of the body. This component works with the engine control system, switching on depending on the load, coolant temperature, and driving conditions.

In practice, this means:

• efficient cooling of the coolant during city driving and in traffic jams,
• maintaining a stable operating temperature for the diesel engine,
• reducing the load on other cooling system components, such as the radiator or hoses.

Assembly construction: fan motor and relay

The fan is equipped with a 600W electric motor, which ensures adequate airflow efficiency even under high thermal loads on the power unit. The integrated control relay enables proper cooperation with the factory BMW electrical installation, which facilitates installation and reduces the need for additional modifications.

Such a solution allows for:

• precise fan activation in accordance with signals from the control system,
• stable operation at variable speeds,
• maintaining compliance with the vehicle's factory parameters.

Vehicle placement and compatibility with diesel engines

The component is designed for installation in the front of the car, in the immediate vicinity of the radiator. This placement ensures optimal airflow during stationary operation and at low speeds, which is particularly important in the case of BMW diesel engines, which often operate under high loads.

Selecting a fan with the correct fuel type is important for:

• adjusting operating characteristics to the higher temperatures generated by diesel units,
• maintaining proper cooperation with factory controls,
• reducing the risk of overheating in demanding operating conditions.

Condition, origin, and benefits of using OEM parts

The offered radiator fan is an original BMW component sourced from disassembly, in used condition. Choosing OEM parts allows you to maintain factory fitment for mounts, electrical harnesses, and cooling system operating parameters, which is especially important in modern designs with complex control electronics.

Using an original fan with a relay provides, among other things:

• certainty of compatibility with the electrical system and engine controller,
• adequate cooling performance selected by the vehicle manufacturer,
• reduction of the risk of controller errors and overheating messages.

Selection by numbers and additional support for online purchases

When selecting a radiator fan for a BMW 1 or 3 Series with a diesel engine, it is crucial to compare the OEM part number and interchangeable numbers with the vehicle data. This helps avoid installation problems and ensures full compliance with the car's factory configuration. If you want to go through the verification process step by step, it is worth using the practical tips available in the guide Buying parts online without risk – 5 proven ways to verify component compatibility, where, among other things, the selection of BMW components by OEM numbers is described.

If you are planning a comprehensive repair or modernization of the exterior body elements in your BMW and need other components from the same group, such as covers, overlays, or additional trim, check the available parts in the BMW Overlays category.