Lexus LS400 1UZFE V8 Fuel Injection Rail Hose Pipe Line 23815-50020

Lexus LS400 1UZFE V8 Fuel Injection Rail Hose Pipe Line is an original fuel system component designed for the 1UZ-FE V8 engine. It ensures stable fuel delivery to the injectors, which translates into smooth engine operation and predictable throttle response. This solution is dedicated to users who expect consistent fuel system performance and the preservation of factory engine parameters.

Specifications and technical data

• SKU: 2381550020
• Mark: Lexus
• Condition: Used
• OEM Part Number: 2381550020
• Substitutable numbers: 2381550020, 23815-50020, 23815
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The fuel injection rail in the 1UZ-FE engine is responsible for the even distribution of gasoline to individual cylinders, maintaining the correct operating pressure at the injector inlets. A properly selected rail helps maintain a stable air-fuel mixture, which is crucial for the smooth operation of the characteristic V8 engine in the LS400 model.

This component works in conjunction with other fuel system parts, such as the fuel pump, flexible and rigid lines, and injectors, creating a cohesive, leak-proof, and predictable system. As a result, the engine maintains proper power, and the response to load remains consistent under various operating conditions.

Benefits of using an original fuel injection rail

Using a factory fuel injection rail in a Lexus LS400 with a 1UZ-FE engine allows for compliance with the manufacturer's design, which is important for both durability and engine performance. The original geometry of the fuel channels and the correct mounting points facilitate installation and minimize the risk of leaks.

• Maintenance of proper fuel distribution to all cylinders.
• Compatibility with factory injectors and fuel lines.
• Stable fuel system operation across the full load range.
• Reduced risk of starting issues and rough idling.

For users who care about maintaining the original performance characteristics of the V8 engine, choosing this component is a practical service solution, especially during comprehensive fuel system maintenance.

Component condition and service application

The fuel injection rail is a salvaged part, making it an attractive option for repairs where factory design compliance and cost control are important. This type of part is suitable for:

• fixing leaks within the rail or its connectors,
• repairs following mechanical damage in the engine bay,
• refurbishing or replacing the complete fuel system in an LS400.

Selecting a rail compatible with the 1UZ-FE engine avoids issues with mounting alignment, connector positioning, and compatibility with factory injectors, which reduces workshop labor time.

Role in the Lines, Hoses, and Pipes category

Although the fuel injection rail is a rigid component, it functionally belongs to the group of parts responsible for fuel transport – together with lines, hoses, and pipes, it creates a continuous flow path for gasoline from the tank to the combustion chamber. A properly selected and sealed set of these components reduces the risk of pressure drops, air in the system, and fuel leaks in the engine bay.

Replacing the rail is particularly recommended when upgrading or repairing the entire fuel path, especially when symptoms such as starting difficulties, power loss, or rough operation on gasoline occur. In such a scenario, using an original component helps restore predictable engine performance.

Support with selection and additional materials

If you are planning a comprehensive repair or upgrade of the fuel system area in your Lexus and need other components from the same group, such as rigid supply lines, flexible return hoses, or connecting pipes for the rail, check the available parts in the Lexus Lines, Hoses, and Pipes category.

For users and workshops that want to better understand the principles of fuel system operation, diagnostics, and best maintenance practices, the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses topics such as selecting parts by OEM numbers and typical service procedures, will be helpful.