Volkswagen Transporter T5 1.9 Diesel BRS vacuum line pipe hose 7h2611931ad 2007

#60

Genuine used Volkswagen Transporter T5 1.9 TDI brake servo vacuum pipe / vacuum hose with non-return valve, part number 7H2611931AD, removed from a 2007 VW Transporter T5 with the BRS 1.9 TDI engine.

This factory vacuum line forms part of the brake-servo vacuum system and carries vacuum from the engine-driven vacuum source to the brake booster/servo. The integrated non-return valve helps retain vacuum within the system and assists consistent brake-servo operation.

Part Number: 7H2611931AD

VW OE Number: 7H2 611 931 AD

Part Type: Brake Servo Vacuum Pipe / Vacuum Line / Vacuum Hose

Integrated Component: Non-Return / Check Valve

System: Brake Servo Vacuum System

Engine: 1.9 TDI

Engine Code: BRS

Engine Output: 75 kW / 102 PS

Donor Vehicle: Volkswagen Transporter T5 – 2007

Vehicle Configuration: Suitable for matching RHD applications

Manufacturer: Volkswagen / VAG

Condition: Genuine used part

Compatibility

Confirmed application:

* Volkswagen Transporter T5 – 2007

* 1.9 TDI BRS

* 75 kW / 102 PS

* UK RHD application where the matching pipe configuration is fitted

Also found on selected:

* Volkswagen Transporter T5

* Volkswagen Caravelle T5

* Volkswagen Multivan T5

* Volkswagen California / Camper T5

* Panel Van

* Kombi

* Shuttle / passenger versions

* Selected 7J chassis/platform variants

Genuine VW catalogue information shows 7H2611931AD within the Transporter T5 range and specifically identifies it for the BRS 1.9 TDI in relevant production applications.

Technical Information

The diesel engine requires a reliable vacuum supply for operation of the brake servo.

Unlike a petrol engine, a diesel engine does not naturally produce sufficient intake-manifold vacuum for the brake booster under all operating conditions.

A mechanically driven vacuum pump therefore generates the required vacuum.

The 7H2611931AD pipe provides the vacuum connection between the vacuum source and the brake-servo system.

Its primary functions are to:

* Transfer vacuum to the brake booster

* Maintain a sealed vacuum circuit

* Support brake-servo assistance

* Retain vacuum using the integrated non-return valve

* Prevent unwanted reverse airflow through the vacuum circuit

Non-Return Valve Information

A particularly important feature of 7H2611931AD is its integrated non-return/check valve.

The valve allows vacuum to operate in the required direction while helping prevent vacuum from being lost when operating conditions change.

This helps maintain a reserve of vacuum for brake-servo assistance.

A faulty non-return valve can cause symptoms even when the vacuum pump itself is functioning correctly.

Brake Servo System Information

The vacuum-assisted braking system includes components such as:

* Engine-driven vacuum pump

* Main vacuum pipe

* Non-return valve

* Brake servo / brake booster

* Master cylinder

* Associated seals and connections

When the brake pedal is pressed, stored vacuum assists the brake servo in increasing the force applied to the brake master cylinder.

This reduces the physical pedal effort required from the driver.

Common Symptoms / Reasons for Replacement

A leaking or damaged vacuum pipe may cause:

* Hard brake pedal

* Increased brake pedal effort

* Reduced brake-servo assistance

* Hissing noise

* Vacuum leakage

* Cracked plastic pipe

* Split rubber connection

* Damaged non-return valve

* Broken connector

* Damaged servo connection

* Pipe becoming brittle with age

* Intermittent brake assistance

Because this is part of the braking system, any suspected vacuum loss should be investigated promptly.

Non-Return Valve Failure Symptoms

A failed check valve can potentially cause:

* Vacuum disappearing too quickly after the engine is switched off

* Hard brake pedal after the vehicle has been standing

* Reduced reserve brake assistance

* Hissing from the valve/pipe area

* Inconsistent brake-servo assistance

The valve should allow airflow/vacuum in the intended direction while restricting reverse flow.

Important Diagnostic Information

A hard brake pedal does not automatically mean the vacuum pipe is faulty.

The complete system should be checked, including:

* Vacuum pump

* 7H2611931AD vacuum pipe

* Non-return valve

* Brake-servo connection

* Brake booster/servo

* Rubber seals

* Smaller associated vacuum hoses

* Pipe joints and connectors

A vacuum gauge or suitable vacuum-testing equipment can be used to determine whether the system is generating and retaining sufficient vacuum.

Vacuum Leak Inspection

Inspect the pipe carefully for:

* Hairline cracks

* Split rubber sections

* Loose connections

* Damaged plastic fittings

* Broken retaining points

* Hardened hose sections

* Oil contamination

* Damaged non-return valve

Small vacuum leaks can be difficult to identify visually.

Particular attention should be paid to joints and areas where the pipe has been exposed to engine vibration and heat.

Vacuum Pump Information

If the pipe is being replaced because of poor brake assistance, the vacuum pump should also be tested.

A good pipe cannot compensate for a vacuum pump that is failing to generate sufficient vacuum.

Likewise, replacing the vacuum pump will not resolve the problem if 7H2611931AD or its non-return valve is leaking.

Safety Information

This component forms part of the brake-assistance system.

If the brake pedal becomes unusually hard or brake assistance is reduced, the vehicle should be properly diagnosed before continued use.

Loss of vacuum assistance does not necessarily mean complete loss of the hydraulic brakes, but considerably more pedal force may be required to slow the vehicle.

Installation

Before installation:

* Compare the replacement pipe with the original

* Check the complete OE number

* Inspect the non-return valve

* Check both connection ends

* Inspect the brake-servo connection

* Check surrounding vacuum hoses

During installation:

* Route the pipe in its original factory position

* Avoid kinking or twisting

* Fully seat all connections

* Secure retaining clips correctly

* Keep the pipe away from excessive heat and moving components

* Ensure the non-return valve is installed in the correct orientation

After installation:

* Start the engine

* Check for vacuum leaks

* Confirm normal brake-pedal assistance

* Verify that vacuum is retained correctly

Programming / Coding

No programming or coding is required.

This is a mechanical vacuum-system component.

Important Compatibility Note

Please compare before ordering:

* OE number – 7H2611931AD

* Engine code

* RHD/LHD configuration

* Pipe shape

* Pipe length

* Connection design

* Non-return valve position

* Brake-servo connection

* Vacuum-pump connection

* Mounting/retaining points

* Vehicle production date

For this listing, the confirmed donor/application is:

2007 Volkswagen Transporter T5 1.9 TDI BRS – 75 kW / 102 PS

Different T5 engines use different vacuum pipe revisions, including other 7H2611931 suffixes.

Do not purchase solely because the vehicle is a Transporter T5 1.9 TDI.

Matching 7H2611931AD directly with the original pipe is strongly recommended.

Condition

Genuine Volkswagen used brake vacuum system component.

As a used engine-bay component, normal signs of previous use may include:

* Surface marks

* Dirt

* Dust

* Light staining

* Minor oxidation to fittings

* General signs of previous installation/removal

Please inspect all listing photographs carefully, particularly the pipe body, connection ends, non-return valve, rubber sections and retaining points.

Because this component is part of the brake-servo vacuum system, its condition and connections should be checked carefully before installation.

Any identifying colour/security markings applied to the part must remain intact in the event of a return.

Ideal genuine replacement for a cracked, leaking or damaged Volkswagen Transporter T5 1.9 TDI BRS brake-servo vacuum pipe with non-return valve, provided 7H2611931AD matches the original component.