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04- VW TRANSPORTER T5 DIESEL FUEL COOLER 7H0203551B

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£38.00
£38.00
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Genuine used Volkswagen Transporter T5 diesel fuel cooler, part number 7H0203551B. This underbody fuel-system component is designed to reduce the temperature of diesel fuel returning from the engine before it reaches the fuel tank, helping maintain suitable fuel temperature and protect the fuel system from excessive heat.


Part Number: 7H0203551B

VW OE Number: 7H0 203 551 B

Part Type: Diesel Fuel Cooler / Fuel Return Cooler / Heat Exchanger

Position: Underbody / Fuel Return System

Fuel Type: Diesel

Manufacturer: Volkswagen

Condition: Genuine used part


Compatibility


Suitable for selected diesel versions of:


* Volkswagen Transporter T5 – from 2003/2004 onwards

* Volkswagen Caravelle T5

* Volkswagen Multivan T5

* Selected panel van, Kombi, chassis cab and passenger variants

* Selected T5 diesel engine applications using 7H0203551B


The T5 range was produced with several different diesel engines and fuel-system configurations, so fitment should be confirmed by the OE number rather than engine size or model year alone.


Technical Information


Diesel fuel used by the engine can absorb considerable heat as it circulates through the fuel system.


Excess fuel is returned towards the tank through the fuel return circuit. Before returning to the tank, the fuel cooler helps dissipate some of this accumulated heat into the surrounding airflow.


Its primary functions are to:


* Reduce returning diesel fuel temperature

* Help control fuel-tank temperature

* Protect fuel-system components from excessive heat

* Support consistent fuel-system operation

* Dissipate heat generated during fuel circulation

* Maintain the intended operating conditions of the diesel fuel system


Fuel System Information


The cooler is positioned in the vehicle’s fuel return circuit and uses its exposed underbody location and external cooling surface to transfer heat from the fuel to the surrounding air.


Unlike an engine radiator, this type of cooler does not normally require an electric cooling fan.


As the vehicle moves, airflow around the cooler assists heat dissipation.


Maintaining appropriate fuel temperature is particularly important because excessive fuel temperature can affect fuel density and the operating conditions of the injection system.


Common Symptoms / Reasons for Replacement


Typical reasons for replacing the fuel cooler include:


* Diesel fuel leakage

* Corrosion of the cooler body

* Damaged fuel connections

* Impact damage from road debris

* Cracked or damaged pipe connections

* Heavy external corrosion

* Damage during fuel-line removal

* Previous underbody accident damage

* Restricted or contaminated fuel passage


A leaking fuel cooler should be addressed promptly because it forms part of the vehicle’s fuel system.


Important Diagnostic Information


If diesel is visible around the cooler, do not automatically assume the cooler body itself is leaking.


Inspect:


* Fuel hoses

* Pipe connections

* Hose clips / retaining fittings

* Fuel return lines

* Cooler connections

* Mounting brackets

* Adjacent fuel pipes


Clean the area first where appropriate and identify the exact source of the leak.


A damaged hose or connection can allow diesel to run across the cooler and make the cooler appear faulty.


Fuel Leak Safety Information


Diesel fuel-system leaks should be repaired promptly.


Before installation:


* Work in a well-ventilated area

* Keep ignition sources away

* Prevent dirt entering open fuel lines

* Plug exposed lines during removal where appropriate

* Clean spilled diesel immediately

* Check all connections carefully after installation


After fitting, run the engine and inspect the system thoroughly for leakage.


Installation


The cooler is installed underneath the vehicle and connects into the diesel fuel return system.


Installation normally involves:


* Safely raising and supporting the vehicle

* Disconnecting the relevant fuel lines

* Removing the cooler mounting hardware

* Installing the replacement cooler

* Reconnecting the fuel pipes correctly

* Securing all mounting points

* Checking the system for leaks


Care should be taken with older fuel pipes and connectors, as plastic fittings and hoses can become brittle with age.


Programming / Coding


No programming or coding is required.


This is a mechanical fuel-system heat exchanger.


Important Compatibility Note


Please compare before ordering:


* OE number – 7H0203551B

* Cooler dimensions and shape

* Fuel pipe connections

* Number and position of connections

* Mounting brackets

* Engine/fuel-system specification

* Vehicle production date


Do not order solely because the vehicle is a VW Transporter T5 diesel. Different fuel-system arrangements may have been used depending on engine and production specification.


Matching 7H0203551B with the original component is strongly recommended.


Condition


Genuine Volkswagen used fuel-system component.


As an underbody part, normal signs of previous use may include:


* Surface corrosion

* Road dirt

* Marks and scratches

* Oxidation

* Cosmetic deterioration


Please inspect all listing photographs carefully, particularly the fuel connections, cooler body and mounting points.


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


Ideal genuine replacement for a leaking, corroded or damaged Volkswagen Transporter T5 diesel fuel cooler, provided 7H0203551B matches the original part.

Brand: Volkswagen

Manufacturer Part Number: 7H0203551B

Country of Origin: Germany

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04- VW TRANSPORTER T5 DIESEL FUEL COOLER 7H0203551B

£38.00

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