Fuel Pump BMW G20 G21 B47 B57 Diesel Sender Delivery Unit 7473447

Fuel Pump BMW G20 G21 B47 B57 Diesel Sender Delivery Unit is an original fuel system component designed for modern BMW 3 Series diesel engines. This complete assembly, which includes both fuel delivery and fuel level measurement functions, ensures stable engine fuel supply and precise fuel level information, resulting in trouble-free operation of the injection system and accurate readings on the instrument cluster.

Specifications and technical data

• SKU: 7473447
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7473447
• Substitutable numbers: 7473447, 16117473447
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The offered fuel pump is a factory BMW solution designed to work with B47 and B57 family diesel engines in G20 and G21 bodies. The unit serves a dual role: it is responsible for pumping diesel fuel from the tank to other system components and for continuous fuel level measurement via an integrated sensor. This ensures that the engine control unit and instrument cluster receive reliable data, and the engine is provided with a stable fuel supply across the entire load range.

The item belongs to the Fuel pumps and level sensors category, meaning it has been engineered to operate in a fuel environment while maintaining appropriate resistance to pressure, temperature, and the chemical properties of diesel fuel.

Module construction and key technical features

The fuel pump module for the BMW G20/G21 combines an electric low-pressure pump and a fuel level sensor in a single housing. This design simplifies maintenance, as replacement is performed as one complete assembly. The use of dedicated basket geometry and float guides ensures repeatable fuel level readings, even during dynamic driving and changes in vehicle orientation.

The system is adapted for use with Diesel fuel, which is important for compatibility with seals, lines, and the pump's operating characteristics. The OEM design guarantees the correct flow and pre-pressure parameters required by modern common rail systems used in B47 and B57 units.

Condition, selection, and practical application

The fuel pump is offered as a used part, allowing for an economical repair of the fuel system while maintaining original BMW specifications. This solution is particularly beneficial in the event of a factory module failure, starting problems, intermittent engine operation at low fuel levels, or incorrect fuel gauge readings.

When selecting the component, it is crucial to compare the manufacturer's markings and the configuration of electrical and fuel connections with the previously installed module. Using an original BMW solution reduces the risk of compatibility issues and minimizes the need for installation modifications.

Benefits of using an original BMW fuel pump

• Factory fitment – a module designed specifically for the G20/G21 platform and B47/B57 engines, with no adaptation required.
• Stable diesel fuel supply – proper operation of the injection system across the full range of RPM and loads.
• Precise fuel level measurement – integrated sensor working with the vehicle's electronics.
• Economical repair – a used OEM component as a sensible alternative to a new part.

If you are considering installing a used component in your vehicle's fuel or electronic system and want to better understand when such a solution is justified, it is worth checking out our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?

Expanding the BMW fuel system – items from the same group

If you are planning a comprehensive repair or upgrade of the fuel system area in your BMW and need other items from the same group, such as additional pump modules, fuel level sensors, or other components responsible for fuel delivery, check out the available parts in the BMW fuel pumps and level sensors category.