BMW E81 E87 LCI E90 E91 High Pressure Fuel Pump Petrol N43 7562473

BMW E81 E87 LCI E90 E91 High Pressure Fuel Pump Petrol N43 is an original component from the Fuel pumps and level sensors group, designed for BMW N43 family petrol engines. This used high-pressure pump provides a practical service solution for drivers looking to restore proper fuel supply while maintaining the factory performance characteristics of the engine.

Specifications and technical data

• SKU: 7562473
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7562473
• Substitutable numbers: 13517562473, 7562473, 0261520041
• Fuel type: Petrol
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The presented high-pressure fuel pump is a component of the petrol supply system in N43 engines used in BMW 1 Series E81/E87 and 3 Series E90/E91 models. It is responsible for generating sufficiently high fuel pressure for the injectors, which has a direct impact on stable engine operation, idle quality, and throttle response.

Thanks to its factory design, the pump works with the original control electronics, maintaining correct fuel dosage parameters and enabling the injection system to operate properly without the need for installation modifications. This solution is particularly beneficial for repairs where maintaining stock engine settings is a priority.

Benefits of using an original petrol pump

Using an original high-pressure fuel pump in an N43 petrol engine helps reduce the risk of problems typical of aftermarket replacements with uncertain parameters. Designed by the vehicle manufacturer, this component ensures:

• consistency with the factory fuel supply and engine management system,
• proper operating pressure across the entire load range,
• correct compatibility with the fuel rail and injectors,
• diagnostic capability in accordance with BMW service procedures.

For the user, this means more predictable vehicle behavior, easier troubleshooting of potential faults, and a greater chance of permanently resolving fuel supply issues.

Technical specifications and installation

The pump has been designed to work with a petrol engine, which is why its construction, seals, and operating parameters are adapted to the properties of petrol fuel. Installation is carried out in the factory-designated location for N43 units, using original mounting points and stock fuel lines.

Before installation, standard service procedures are recommended, such as checking the condition of lines, seals, and the cleanliness of the fuel system. A properly installed pump allows for the restoration of correct fuel pressure, which is crucial when dealing with starting issues, power loss, or unstable idle.

Component condition and service application

The offered high-pressure fuel pump is a secondary market component, which allows for an economical repair of the fuel system while maintaining the original BMW design. This solution is particularly useful in the event of a factory pump failure, when cost reduction is desired compared to purchasing a new unit, while simultaneously maintaining compliance with factory technical solutions.

Due to the specific nature of high-pressure pump operation, it is worth performing basic fuel system diagnostics before installation to rule out other causes of problems, such as fuel contamination or electronic control faults.

Technical support and additional information

When selecting a pump for a specific version of the N43 engine, data such as the engine code, vehicle production year, and fuel system configuration can be helpful. It is also worth paying attention to compatibility with the existing fuel installation so that the installation proceeds smoothly and without the need for modifications.

If you are planning a comprehensive repair or upgrade of the fuel supply area in your BMW and need other components from the same group, such as in-tank pumps, supply modules, or level sensors, check the available parts in the BMW fuel pumps and level sensors category.

If you are considering a wider use of secondary market components and want to better understand when used parts are a reasonable choice, you will find useful information in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which discusses the practical aspects of selecting used components in modern cars.