Citroen C6 turbos

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It looks like my C6 needs new turbos. I believe they are Garrett GTA15VVNT, but are they the same for both banks?

Anyone got any recommendations for a supplier? My garage is happy to install supplied parts so I'm taking a look in case we can do it cheaper this way.

[feef]

Yes. The 2.7 diesel v6.

Afaik it is the same but googling the Garrett code doesn't bring much up

[feef]

The car is already with Chevronics

We have decided on reconditioned turbos, and I'm likely going to acquire some second hand ones as well to then refurb and have on the shelf just in case