Audi Tt 8N Mk1 A3 8L Skoda Octavia Mk1 Fuel Pump Relay 409 12V 40A 1J0906383C

Audi Tt 8N Mk1 A3 8L Skoda Octavia Mk1 Fuel Pump Relay 409 12V 40A is an original component from the Relays group, designed to control the fuel pump power supply in selected VAG group models. The used OEM component ensures proper compatibility with the factory electrical system, stable operation of the fuel supply system, and predictable engine performance under various operating conditions.

Specifications and technical data

• SKU: 1J0906383C
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 1J0906383C
• Substitutable numbers: 1J0906383C, 1J0 906 383 C
• Part type: Relay
• Rim width: 8
• Category: Relays

Purpose and function of the fuel pump relay

The fuel pump relay is responsible for the controlled switching on and off of the power supply to the in-tank pump, in accordance with signals from the engine control system. A correctly selected component:

• ensures stable fuel pressure in the fuel rail,
• reduces the risk of power drops resulting from power supply interruptions,
• supports trouble-free cold and warm starts,
• protects the electrical system against overload thanks to appropriately selected electrical parameters. In vehicles such as the Audi TT 8N, Audi A3 8L, or Skoda Octavia Mk1, using the correct relay is crucial for maintaining the proper operation of the fuel system and avoiding random engine stalls.

Benefits of using an original Volkswagen relay

The offered relay comes from the Volkswagen line, which means compliance with factory quality standards and electrical parameters. In practice, this translates into:

• a secure fit to the wiring harness and mounting socket,
• the correct switching characteristics for the fuel pump circuit,
• consistent cooperation with the factory engine control unit,
• preservation of the original fuel system safety logic. As a result, the relay is a suitable choice both for a typical replacement of a worn-out part and for diagnosing fuel supply issues, such as starting difficulties or sporadic engine stalling.

Condition, verification, and practical application

The item comes from disassembly and is offered as a used fuel pump relay, which allows for optimizing repair costs while maintaining the original specification. This type of part is particularly useful in vehicles used on a daily basis, where a reasonable balance between price and functionality is important. Before installation, a standard service procedure is recommended: checking the condition of the socket, inspecting the installation for contact corrosion, and verifying the correct operation of the system after replacement. A properly functioning relay helps stabilize the fuel pump operation and facilitates further diagnostics of potential faults in the fuel supply system.

Mounting parameters and fitment

The relay is designed to work in the factory electrical socket of VAG group vehicles that use this type of fuel pump control. The housing design and pin layout are adapted to standard relay boxes, which facilitates replacement in workshop and service conditions. The technical description of the product includes information about the OEM part number and interchangeable numbers, which allows for precise verification of compatibility with a specific engine version and model year. This helps reduce the risk of selecting the wrong component and speeds up the repair process.

Knowledge expansion and part selection

If you want to better understand how the selection of appropriate components – including relays and fuel system elements – affects the durability of the engine and service costs in Volkswagen cars, it is worth reading an article discussing the comparison of popular engines and repair strategies using parts from disassembly: Volkswagen 1.9 TDI vs 1.4 TSI – evolution of VW engines and repair costs. If you are planning a comprehensive repair or upgrade of the electrical system area responsible for fuel supply in your Volkswagen and need other elements from the same group, such as control relays, switching modules, or additional safety components, check the available parts in the Volkswagen Relays category.