BMW F20 F21 LCI Fuel Injector Pipe Hose Return Line B37 114d 116d 8514094

BMW F20 F21 LCI Injector Fuel Line B37 114D 116D is a fuel system component designed for BMW 1 Series facelift (LCI) diesel engines with the B37 unit. It is responsible for precisely delivering diesel fuel to the injectors, which directly impacts stable engine operation, running smoothness, and fuel consumption parameters.

Specifications and technical data

• SKU: 8514094-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8514094
• Substitutable numbers: 8514094, 13538514094, 8514093, 13538514093
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Function in the Injection System

The injector fuel line in a B37 diesel engine plays a crucial role in maintaining proper pressure and continuous supply to the injectors. A correctly selected component minimizes the risk of leaks, pressure drops, and problems with starting or uneven engine operation.

For modern diesel engines, such as the B37 in the 114d and 116d versions, correct fuel flow is essential for:

• stable injector operation across the full load range,
• maintaining the correct mixture composition and reducing smoke,
• reducing fuel consumption and protecting auxiliary components.

Technical Characteristics and Compatibility

The offered fuel line belongs to the Injector Nozzles category, meaning it is integrally linked to the precise operation of the diesel engine's injection system. It is designed to work with the B37 unit used in the BMW F20 and F21 LCI in the 114d and 116d versions, where maintaining high sealing and resistance to operating pressure is required.

Thanks to the use of a solution consistent with the factory design, the fuel line ensures:

• correct fuel delivery between the fuel rail and the injectors,
• appropriate routing geometry in the engine bay, facilitating installation,
• compatibility with the factory fuel system without the need for modifications.

Component Condition and Installation Aspects

The fuel line is offered as a used part, allowing for economical repair of the injection system while maintaining compatibility with the original BMW solution. Before installation, a standard leak test and visual inspection of the connectors for any mechanical damage are recommended.

When replacing the fuel line, it is worth paying attention to:

• cleanliness of the seats and connectors in the fuel system,
• correct tightening torque in accordance with service documentation,
• absence of stress after the fuel line is installed in its final position.

Benefits of Using a BMW Injector Fuel Line

Using a fuel line matched to a specific BMW diesel engine helps to reduce common fuel system problems such as air ingress, leaks, or power loss. The correct component helps to:

• maintain even operation of all cylinders,
• reduce the risk of injector damage due to incorrect fuel pressure,
• preserve predictable engine characteristics in daily use.

For users who want to better understand the impact of fuel system components on diesel engine operation, we recommend the article: Diesel Injector Failures – How to Recognize Them and What Their Neglect Entails, which discusses the symptoms and consequences of improper injector operation and the importance of fuel line sealing.

Related Products and BMW Injection System Expansion

If you are looking for other components from the BMW Injector Nozzles category for expanding or comprehensively repairing the fuel system in your car, check out our offer for BMW injector nozzles, where you will find a wide selection of components tailored to various models and engine versions of this brand.