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I am looking for information on the Garrett VNT-15 turbocharger. I have noticed two versions; 9-Vane and 11-Vane. Does anyone know when they switched to 11-Vane and which model years have it? Any history on this?
 

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Don't quote me on this but I don't think the VNT 15 is the full Garrett part number, they usually have a 4 digit number. The 9 vane and 11 probably have different part numbers. I was not aware of a 9 vs. 11 vane difference.
 

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I hammered the internet for a while - it looks like a Garrett design revision and not a different version - I did see turbochargers for sale that were "Euro" version, but I believe that is in comparison to early non-VNT TDI's
 
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