Campaign 23H9 - 103kW/125kw TDI PD Piezo Siemens Injector Failure

[bluey]

More info on the campaign here
Injector Failures - Possible recall - Page 53

Technical background

On some vehicles with the 2.0l TDI engine, deposits can settle on the Piezo pump injector elements because of dirty engine oil. This can lead to running problems. Not all vehicles are affected by this campaign! On the affected vehicles the Piezo pump injector elements must be checked and if necessary replaced. Please make sure that on the affected vehicle the check and repair of all open campaigns/measures are performed during the workshop visit.

Parts to be fitted as part of this campaign.

1x Campaign 23H9 sticker 000 010 006
1x Wiring loom adapter 03G 971 033 M
4x Adjustment screw WHT 000 530
5x M8x58 socket head bolt N 105 811 01
8x M6x88 socket head bolt 03G 103 385 A
4x Pump injectors

Seems a bit weird that VW would replace injectors fouled by dirty engine oil without fixing the engine oil problem at the same... or has something else changed too like oil specification??