Used Audi 077905381K Bosch 0261210261 RPM / Crankshaft Sensor 95560638120 DG6K.

Working sensor removed from 2006 Audi Q7 3.0 TDi Quattro (BUG engine code).

Genuine OEM VW Audi part.

I incorrectly assumed this was causing my starting issues so I replaced it without actually diagnosing the fault but it made zero difference, therefore not faulty!