Scirocco Central

Hello, I'm in need of some help.
I currently have a 2010 scirocco 2.0tdi (140)
Recently I got a flashing coil up on my dash. After a diagnostic it came up as P0544 exhaust gas temperate sensor circuit bank 1 sensor 1.
I rang a few parts companies in hope that with this info they could supply me the part but no joy.
As far as I'm aware there are 3 temperature sensors ?
I unplugged the brown connector and it threw up a temperature sensor 3 fault.
Then unplugged the orange connector which threw up a temperature sensor 4 fault.
Then unplugged the black with no fault thrown up at all?

So I'm still unsure which temperature sensor bank 1 sensor 1 is.
I don't want to order one ( about 100 pound each ) without knowing for sure

I think... it may be the black one which had a part code of 03l906088l ?

I'll try and give more detail if I can.
Thank you in advance

It should be the black sensor, which is the pre-turbocharger one.

If you give me your engine code I can lookup the newest replacement part number.