VW Volkswagen Touran 1T 1.4 TSI Control Valve Breather Line Pipe 03C103558D

VW Volkswagen Touran 1T 1.4 TSI Control Valve Breather Line Pipe is an item from the Lines, hoses and pipes group, designed for the crankcase ventilation system in a petrol engine. It ensures controlled flow of gases from the breather, which promotes stable engine operation and reduces contamination of the intake system.

Specifications and technical data

• SKU: 03C103558D
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 03C103558D
• Substitutable numbers: 03C103558D, 03C 103 558 D
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and function in a petrol engine

The breather line with a valve in the 1.4 TSI unit is responsible for discharging gases from the crankcase to the intake system, while maintaining the correct direction and flow rate. In petrol-powered engines, a properly functioning breather system is essential for maintaining stable crankcase pressure, limiting oil leaks, and reducing deposits in the intake manifold.

A properly selected line integrated with a valve helps maintain smooth idling, improves the refinement of the TSI unit, and supports the correct operation of the mixture control system.

Technical characteristics of the component

The offered breather line with a valve comes from the Volkswagen brand, which means compliance with factory standards of workmanship and fitment for the Touran 1T 1.4 TSI engine system. The design of the line is adapted for operation in the engine compartment, where variable temperatures and contact with oil vapors occur.

The component belongs to the Lines, hoses and pipes group, making it designed for resistance to vacuum, vibrations, and typical operational loads in the ventilation system. The integrated valve performs a directional and flow-stabilizing function, which is important for the correct operation of the intake system and exhaust emissions.

Condition, origin and fitment

The product is marked as used, which allows for an economical replacement of the component while maintaining compliance with the manufacturer's original specification. For certainty of selection, you can use the OEM part number and available interchangeable numbers, which facilitates verification of compatibility with a specific engine configuration and vehicle year.

Proper fitment of the breather line with a valve has a direct impact on system tightness, correct vacuum operation, and the reduction of problems such as unstable idle or excessive oil consumption.

Benefits of using an original breather line

Using a breather line with a valve designed for the VW Touran 1T 1.4 TSI ensures:

• preservation of the factory routing geometry of the line in the engine compartment,
• correct operation of the crankcase ventilation system,
• better idle stability and performance under load,
• reduction of blow-by and unwanted vapors in the engine compartment.

Thanks to this, replacing a worn or leaking component with the correct breather line with a valve supports long-term, predictable operation of the TSI unit.

Part selection by number and technical support

When selecting components such as breather lines in petrol engines, it is worth using the manufacturer's markings and vehicle data to avoid problems with installation and tightness. A practical step-by-step guide may be helpful – you can find it in the article Guide: how to select the right car part by VIN and OEM number, which describes how to verify compatibility and a list of questions worth asking the seller.

If you are planning a comprehensive repair or upgrade of the engine area in your Volkswagen and need other components from the same group, such as vacuum lines, ventilation system hoses, or supply pipes, check the available parts in the Volkswagen lines, hoses and pipes category.