Is it dangerous to drive with a faulty ECU?

Yes, this is the central computer controlling core engine functions — significant faults here can cause the engine to run poorly, stall unexpectedly, or not start at all, so this should be diagnosed by a specialist promptly.

Can a used ECU be fitted from another vehicle?

This requires careful matching to the exact engine variant and specialist programming/synchronisation — an incorrectly matched or unprogrammed unit generally won’t work correctly.

What is the ECU made of?

A sealed electronic circuit board with a microprocessor, memory, and extensive input/output circuitry, in a weatherproof housing.

How do I check whether Engine control unit VW PASSAT B6 2008 ANGL. fits my vehicle?

Compare OEM reference 03G906021NK, the listed vehicle (VW PASSAT 2005-2010), connectors, mounting points and the photographs for this exact item.

What is the condition of Engine control unit VW PASSAT B6 2008 ANGL.?

Listed condition: Used. Current availability: 1 in stock - ready to ship. Review the item photographs and any stated defects as well.

How is Engine control unit VW PASSAT B6 2008 ANGL. delivered and returned?

Available delivery methods, timing and price for your country are shown in the cart. Review the applicable 14-day return terms before ordering.

Engine control unit VW PASSAT B6 2008 ANGL.

Name: Engine control unit VW PASSAT B6 2008 ANGL.
Brand: VW
SKU: 03G906021NK
Price: 58.50 EUR
Availability: InStock

OEM: 03G906021NK

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

Details for this exact part

Code: 03G906021NK
OEM: 03G906021NK
Condition: Used
Availability: 1 in stock - ready to ship
Make, model: VW PASSAT 2005-2010
Year: 2007
Engine: Diesel 2.0L 125 KW - BMR
VIN: WVWZZZ3CZ7P047990

What is this part and why does it matter?

The engine control unit (ECU) is the central computer managing engine operation — fuel injection, ignition timing, emissions control, and more — based on data from numerous sensors.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

Engine won’t start or runs very poorly
Multiple, seemingly unrelated engine-related faults appearing together
Check Engine light constantly on with numerous fault codes

Installation information

Mounted in the engine bay, connecting to the extensive engine wiring harness — requires specialist programming/coding to match the specific vehicle and, often, the immobiliser system.

Frequently asked questions

The ECU needs to be correctly programmed with software matching the exact vehicle, engine variant, and often synchronised with the immobiliser system — this typically requires specialist diagnostic equipment and expertise.

Donor vehicle description

VIN: WVWZZZ3CZ7P047990
Make, model: VW PASSAT B6 Limousine
Year: 2007
Engine: Diesel 2.0L 125 KW - BMR
Transmission: Mechanic - JMA
Drive: Front
Equipment: RHD
Colour: W9 / C5F

78 parts from this car

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Price: excellent.
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Didier V.
August 2026
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
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Ilmars K.
August 2026
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
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Aleksandr L.
Toyota Avensis
August 2026
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
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Paul F.
June 2026
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
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Natālija I.
May 2026
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
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February 2026
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November 2025
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Front fender
October 2025