2009 VOLKSWAGEN TRANSPORTER TURBO INTERCOOLER 1.9 DIESEL AXB 7E0145804B

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♻ GENUINE VOLKSWAGEN TRANSPORTER T5 1.9 TDI TURBO INTERCOOLER 7E0145804B ♻

Genuine used Volkswagen Transporter T5 turbo intercooler / charge-air cooler, suitable for selected diesel engines including the 1.9 TDI AXB.

This intercooler forms an important part of the turbocharged intake system. It cools the compressed air leaving the turbocharger before that air enters the engine, helping increase charge-air density and maintain correct engine performance under load.

Part Number: 7E0145804B

VW OE Number: 7E0 145 804 B

Related / Interchange Numbers: 7H0145804A / 7H0145804B

Part Type: Turbo Intercooler / Charge Air Cooler

System: Turbocharger / Charge-Air System

Material: Aluminium

Position: Front Cooling Pack

Fuel Type: Diesel

Donor Vehicle: Volkswagen Transporter T5

Donor Year: 2009

Donor Engine: 1.9 TDI AXB

Manufacturer: Volkswagen / VAG

Condition: Genuine used part

Compatibility

OE 7E0145804B and its documented interchange numbers 7H0145804A / 7H0145804B are used across a broad range of Volkswagen Transporter T5 diesel applications.

For the pre-facelift T5, compatibility includes selected:

Volkswagen Transporter T5 – 2003–2009

* Panel Van / Furgon

* Kombi

* Shuttle

* Platform / Chassis Cab

* Caravelle T5

* Multivan T5

* Selected California / Campmobile versions

1.9 TDI Engine Compatibility

Confirmed 1.9 TDI engine applications include:

* AXB – 1.9 TDI, 77 kW / 105 PS

* AXC – 1.9 TDI, 63 kW / 86 PS

* BRR – 1.9 TDI, 62 kW / 84 PS

* BRS – 1.9 TDI, 75 kW / 102 PS

The AXB application is directly documented with OE 7E0145804B, making your 2009 1.9 TDI AXB description appropriate.

Additional T5 Diesel Compatibility

The same intercooler family is also documented for selected:

2.5 TDI

* AXD

* AXE

* BLJ

* BNZ

* BPC

and later selected T5.1 2.0 TDI engines including:

* CAAA

* CAAB

* CAAC

* CAAD

* CAAE

* CCHA

* CCHB

This means the intercooler has considerably broader compatibility than the 1.9 AXB donor vehicle alone.

However, for an eBay listing I would keep T5 1.9 TDI 2003–2009 as the primary fitment because that is the specification of your actual donor/application.

Important BiTDI Exception

Do not automatically include the 2.0 BiTDI CFCA 180 PS.

The CFCA application can require a different intercooler, including OE 7E0145804C, depending on specification.

Therefore, CFCA/BiTDI vehicles should be checked separately before purchase.

OE / Interchange Information

Common OE numbers associated with this intercooler include:

* 7E0145804B

* 7H0145804A

* 7H0145804B

These numbers are cross-referenced by multiple replacement intercooler manufacturers.

For example, replacement units for this OE family are typically specified with a core approximately:

720 mm long × 194–195 mm high × 27–32 mm deep

depending on manufacturer.

Technical Information

The intercooler is an air-to-air heat exchanger positioned in the engine’s turbocharged intake circuit.

Its main functions include:

* Cooling compressed air from the turbocharger

* Increasing intake-air density

* Helping maintain engine power

* Supporting efficient combustion

* Reducing charge-air temperature

* Helping maintain stable performance under load

* Supporting correct turbocharger and engine-management operation

Compressing air in the turbocharger increases its temperature.

Hotter air is less dense, so before entering the engine the compressed air passes through the intercooler.

Airflow through the intercooler’s external fins removes heat from the compressed charge air before it continues toward the intake manifold.

Turbo / Charge-Air System Information

The intercooler operates together with the:

* Turbocharger

* Turbo outlet hose

* Charge-air pipes

* Intercooler hoses

* Intake manifold

* EGR system

* MAP / boost-pressure sensor

* MAF sensor

* Turbo actuator

* Boost-control system

* Engine ECU

The entire charge-air system must remain properly sealed.

A leak at the intercooler itself, one of the connecting pipes, or a sealing joint can result in loss of boost pressure.

Common Reasons for Replacement

An intercooler may require replacement because of:

* Cracked end tank

* Damaged aluminium core

* Boost-pressure leak

* Corrosion

* Stone damage

* Front-end accident damage

* Damaged hose connection

* Broken mounting point

* Excessive oil contamination

* Previous incorrect installation

* Bent or badly damaged cooling fins

Common Symptoms of a Faulty / Leaking Intercooler

Possible symptoms include:

* Loss of engine power

* Poor acceleration

* Turbo lag

* Limp-home mode

* Hissing or whooshing under acceleration

* Black exhaust smoke

* Engine management light

* Underboost fault codes

* Increased fuel consumption

* Oil staining around intercooler connections

* Difficulty achieving requested boost pressure

Oil Inside the Intercooler

A small amount of oil mist inside the intercooler and boost pipes can be normal on a turbocharged diesel engine.

Oil vapour can enter the intake system through the crankcase ventilation system and turbocharger.

However, a large quantity of oil should be investigated.

Excessive oil accumulation may indicate problems elsewhere, including:

* Turbocharger oil-seal wear

* Excessive crankcase pressure

* Breather-system problems

* Previous turbocharger failure

If replacing an intercooler following turbo failure, the complete charge-air system should be inspected and cleaned as necessary.

Important Diagnostic Information

A boost-pressure problem does not automatically mean the intercooler or turbocharger has failed.

Also inspect:

* Turbo hoses

* Charge-air pipes

* Intercooler seals

* O-rings

* Retaining clips

* Turbocharger outlet

* MAP sensor

* MAF sensor

* EGR system

* Turbo actuator

* Vacuum hoses

* Boost-control solenoid

A pressure or smoke test of the charge-air system can help locate small leaks.

Installation

Typical installation involves:

1. Allowing the engine to cool.

2. Removing the front/underbody components required for access.

3. Disconnecting the charge-air hoses.

4. Removing the intercooler mounting points.

5. Removing the existing intercooler.

6. Inspecting all connecting hoses.

7. Checking seals and O-rings.

8. Installing the replacement intercooler.

9. Reconnecting the charge-air pipes securely.

10. Ensuring retaining clips are correctly engaged.

11. Checking for boost leaks after installation.

If the previous intercooler was damaged following a turbocharger failure, inspect and clean the entire intake/charge-air system before running the engine.

Programming / Coding

No programming or coding is required.

This is a mechanical charge-air cooling component.

Any stored boost-pressure or underboost diagnostic fault codes may need to be cleared once the mechanical fault has been repaired.

Important Compatibility Note

Before ordering, please compare:

* OE number 7E0145804B

* Related numbers 7H0145804A / 7H0145804B

* Vehicle model and production year

* Engine code

* Intercooler dimensions

* Hose connection positions

* Connection diameters

* Mounting points

* Manual/automatic specification where relevant

* Original intercooler against the listing photographs

* VIN where possible

For your item, the strongest primary compatibility is:

VW Transporter T5 1.9 TDI 2003–2009 – AXB / AXC / BRR / BRS

with your specific donor/application being:

2009 VW Transporter T5 1.9 TDI AXB – OE 7E0145804B.

The same OE/interchange family is also documented on selected 2.5 TDI and T5.1 2.0 TDI vehicles, but buyers should match the OE number and engine specification before ordering.

Condition

Genuine used Volkswagen part.

As a used intercooler, normal signs of previous use may include:

* Bent cooling fins

* Surface marks

* Dirt

* Oil mist/residue internally

* Light oxidation

* Marks around hose connections

* General age-related wear

Please inspect all listing photographs carefully, particularly the:

* Aluminium core

* End tanks

* Hose connections

* Mounting points

* Cooling fins

An ideal genuine replacement for a cracked, leaking, damaged or faulty VW Transporter T5 1.9 TDI turbo intercooler / charge-air cooler 7E0145804B.