I wanted to share my experience on this topic since when i was looking into it i couldn't find anything definitive; Iit appears that this issue affected 2.0 Common Rail TDI engines up to September 2009 across the entire VAG range, signs of wear include metallic rattling sounds on engine tick over and at later stages low engine oil pressure warning(s).
If badly worn, the hex shaft is unable to turn the oil pump thus starving the engine of oil.
My 2009 plate 2.0 CR-TDI 170 DSG w/ engine code CBBB has covered 74k miles under long life servicing with an additional oil change halfway though the long life schedule for added peace of mind.
I just got my car back from the Dealers, it cost around £200 to get the oil pump hex drive shaft changed for the revised version (P/N: 03G 115 281 F (77mm long still but without hollow)).
There is an option to replace the hex shaft with the 100mm version that was fitted to engines after September 2009 but this requires additional work and parts, kits can be obtained online for the conversion but i didn't feel that this was necessary since mine showed very little signs of wear.
I'm adding photos (see below) of the removed hex drive shaft (P/N: 03G 281 D), as you can see it is relatively worn but not as much as i would have expected, it does mean that the oil pump itself has a limited amount of wear. I guess that i could have gone another 20-30k miles without having this done but that could have something to do with the regular oil changes.
My advice is, if your engine falls into the affected category, i would fit or have the revised part fitted during your next service, google will show you many horror stories where in the end replacement engines were required.
If badly worn, the hex shaft is unable to turn the oil pump thus starving the engine of oil.
My 2009 plate 2.0 CR-TDI 170 DSG w/ engine code CBBB has covered 74k miles under long life servicing with an additional oil change halfway though the long life schedule for added peace of mind.
I just got my car back from the Dealers, it cost around £200 to get the oil pump hex drive shaft changed for the revised version (P/N: 03G 115 281 F (77mm long still but without hollow)).
There is an option to replace the hex shaft with the 100mm version that was fitted to engines after September 2009 but this requires additional work and parts, kits can be obtained online for the conversion but i didn't feel that this was necessary since mine showed very little signs of wear.
I'm adding photos (see below) of the removed hex drive shaft (P/N: 03G 281 D), as you can see it is relatively worn but not as much as i would have expected, it does mean that the oil pump itself has a limited amount of wear. I guess that i could have gone another 20-30k miles without having this done but that could have something to do with the regular oil changes.
My advice is, if your engine falls into the affected category, i would fit or have the revised part fitted during your next service, google will show you many horror stories where in the end replacement engines were required.
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