103kW/125kw TDI PD Piezo Siemens injector failure thread

[Greg Roles]

Hey all,

There's growing evidence that the Siemens injectors fitted to the MKV 125kw engines are starting to fail across the board. Seems to affect the Passat mostly, but as this is basically a GT TDI engine with a counter shaft balancer, the injectors are the same. It seems to be the pizeo portion of the injector that fails, and VW are very aware of the problem and offering revised injectors at exchange with your old ones. I'd like to start a thread to both record the numbers of actual failures, and to inform of any options / fixes as they come to light. I'm doing a lot of research into it, as heck, mine could go at any time, and I'm wondering if I even bother with extended warranty given how modded my engine is starting to look, let alone what it'll look like this year when the big stuff finally happens.

Here's the first of a few interesting articles I've found, but across the world, there are people from Skoda, VW, Seat and even Audi up in arms about the issue. No doubt aftermarket injectors will come, and given the cost VW will no doubt charge, it's the way I'd go. At this stage all I've been able to find is they cost $400ish pound EACH in the UK, love to know what the going price is here.

https://sites.google.com/site/1810ma...iezo-injectors

Also interested if anyone can tell me why the swapout with warranty cars seems to also include the wiring harness - is it different, or just worth doing while you're in there?