VW Seat Skoda 1.2 TDI CFWA Diesel fuel return line is an original part of the fuel supply system, designed for TDI diesel engines. It enables stable fuel return from the injectors, supporting the smooth operation of the engine and the correct hydraulics of the injection system.
Specifications and technical data
- SKU: 03P130235A
- Mark: Volkswagen
- Condition: Used
- OEM Part Number: 03P130235A
- Substitutable numbers: 03P130235A, 03P 130 235 A
- Fuel type: Diesel
- Category: Fuel Injectors
Purpose and Role in the Injection System
The fuel return line for the 1.2 TDI CFWA engine operates in a Diesel fuel supply system, where it is responsible for draining excess fuel from the injectors back to the return line. This limits local overheating of the injectors, stabilizes fuel rail pressure, and improves the engine's running smoothness.
In TDI engines, a properly functioning fuel return line is crucial for:
- maintaining correct fuel pressure in the common rail or pump-nozzle system,
- reducing vibrations and uneven idling,
- minimizing the risk of air ingress into the supply lines,
- stable injector operation under full load conditions.
Benefits of Using an Original Fuel Return Line
This component, from the injector nozzles category, works directly with precision components of the injection system. Therefore, selecting the correct fuel return line is important not only for driving comfort but also for the durability of the entire system.
- Factory Fitment – the line is designed for the specific 1.2 TDI CFWA engine architecture, requiring no modifications.
- Stable Fuel System Operation – proper fuel return flow supports even fuel delivery by the injectors.
- Supports Injector Longevity – efficient fuel circulation helps reduce overheating and contamination around the injector tips.
- Safe Diesel Engine Operation – correct fuel return reduces the risk of power loss and starting problems.
Application in VW, Seat, Skoda Vehicles
The VW Seat Skoda 1.2 TDI CFWA Diesel fuel return line was developed for compact diesel engines used in popular models of the concern. Operation with a diesel engine requires resistance to pressure, temperature, and fuel, so the line's construction is adapted to the specifics of the TDI injection system.
Selecting this part is particularly important when symptoms such as:
- difficulty starting a warm engine,
- uneven idling,
- power loss under load,
- noticeable fuel leaks around the injectors.
Condition, Installation, and Operation
The offered fuel return line is a used part, allowing for an economical repair of the injection system while maintaining the original manufacturer's specifications. Before installation, it is recommended to check the tightness of the entire return circuit and the condition of the injector spigots to ensure proper seating of the line.
When replacing, pay attention to:
- cleanliness of the seats and spigots – dirt can cause leaks,
- proper routing of the line – avoid sharp bends and chafing,
- engine operation check after installation – observe for any leaks and changes in running smoothness.
Technical Support and Educational Materials
If you want to better understand how the fuel return line works with injectors and what symptoms may indicate problems in this area, check out the article: Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails. This is a practical overview of symptoms, consequences, and diagnostic methods for injection systems in diesel engines.
If you are looking for other parts from the injector nozzles category dedicated to this brand, check out the Volkswagen injector nozzles available in our store to comprehensively care for your car's fuel system.
