BMW G20 G21 G21 LCI Fuel Pump Level Sensor 330e B48X B48B20A 2.0 Petrol 7473449

BMW G20 G21 G21 LCI Fuel Pump Level Sensor 330e B48X B48B20A 2.0 Petrol is an original fuel system component designed for facelifted 3 Series models. This used part from the Fuel pumps and level sensors category allows for an economical yet technically sound repair of the fuel system in BMW cars with petrol engines. It is a solution for users who expect factory-fit quality and stable fuel system performance.

Specifications and technical data

• SKU: 7473449
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7473449
• Substitutable numbers: 7 401 428, 7401428, 16117473449, 7473449
• Fuel type: Petrol
• Part type: Fuel Pump
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The presented fuel pump with a level sensor operates within the petrol engine fuel system, responsible for delivering fuel at the correct pressure and transmitting information about its quantity in the tank. In BMW 3 Series G20/G21 LCI models with the B48B20A unit, this component works with the vehicle's electronics, influencing engine stability, starting refinement, and the correct operation of the fuel level gauge on the instrument cluster. By using an original component, compatibility with the factory fuel system characteristics is maintained, which reduces the risk of fuel delivery issues, power drops, or uneven engine operation.

Benefits of using an original BMW fuel pump

Choosing an original fuel pump with a level sensor for the BMW 3 Series G20/G21 LCI provides a number of practical benefits in daily operation:

• Factory fit – a component designed specifically for the given fuel system, with no need for installation modifications.
• Consistent cooperation with vehicle electronics – accurate fuel level readings and stable engine control unit operation.
• Reduced risk of leaks and fuel pressure problems compared to generic aftermarket replacements.
• Ability to maintain predictable combustion parameters and engine performance. A used OEM component is a reasonable compromise between repair costs and maintaining high quality and compatibility with the factory system.

Technical characteristics and compatibility with the petrol system

The fuel pump integrated with the level sensor is designed to work with petrol fuel, in accordance with the requirements of the B48B20A unit. The design takes into account the specifics of modern petrol engines, where stable fuel pressure and precise measurement of its quantity are crucial for the correct operation of control systems. The component belongs to the Fuel pumps and level sensors group, meaning it combines a mechanical function (pumping fuel) and a measuring function (signal for the gauge). This solution simplifies service and replacement, as key components responsible for fuel supply and level monitoring are contained in a single module.

Practical installation and operational tips

When replacing the fuel pump with a level sensor in a BMW G20/G21 LCI, it is worth paying attention to several technical aspects:

• maintaining cleanliness around the fuel tank during disassembly and assembly,
• checking the condition of seals and fuel line connectors,
• correct connection of the electrical harness responsible for powering the pump and the sensor signal. After installation, it is recommended to verify the accuracy of the fuel level reading and check that the engine starts without delay and runs smoothly across the full load range. This allows for quick confirmation that the fuel system is operating according to the manufacturer's specifications.

Expert support and selecting the right part

If you are planning a comprehensive repair or upgrade of the fuel system area in your BMW and need other elements from the same group, such as pump modules, assemblies with level sensors, or pump inserts, check the available parts in the BMW Fuel pumps and level sensors category. When choosing a used fuel pump from dismantling, it is worth following proven tips regarding the assessment of technical condition and operational safety. Detailed information on this topic can be found in the article: Fuel delivery problems – what to look for when buying a used injection pump and fuel rails, which helps you approach the purchase of fuel system components with confidence.