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ECU Hardware Number: Find Yours Now!

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Variweiss



Joined: 11/14/2015
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2011 Volkswagen Passat
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Post05-10-2017, 8:29    Subject: ECU Hardware Number: Find Yours Now! Quote
Hello,

Can someone explain the difference between the engine control units (ECUs) 03L906018BF and 03L907309N, and where the corresponding properties are defined?

When using VCDS to read the data, the following information is displayed for my CFFB engine:
Part number 03L906018BF.
Hardware number 03L907309N.

Best regards,
Ludger
Passat 7 MKB:CFFB SG EZ 2011


Translated on 14-10-2026, 16:53.
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dieselschrauber
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2018 Volkswagen T6 Consumption
Post05-10-2017, 9:15    Subject: ECU Hardware Number: Find Yours Now! Quote
Hi,

The hardware number determines which control unit electronics were used. The VAG part number, in this case, essentially indicates which software is running on it.
The VAG part number is the relevant information for you when replacing the control unit.

Best regards, Rainer.


Translated on 14-10-2026, 16:54.
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