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

**Ozsko** · 22-01-2011, 10:19 PM

I am surprised that the injector replacement is not a dealer only job. On one brand I know of anyone can replace the injectors but until they are coded to the car the injector will not work and that is a dealer only job.

**Transporter** · 22-01-2011, 10:58 PM

Originally Posted by Ozsko

I am surprised that the injector replacement is not a dealer only job. On one brand I know of anyone can replace the injectors but until they are coded to the car the injector will not work and that is a dealer only job.

Yeah, Toyota tried many things to fight aftermarket and it didn't work.

**Ozsko** · 23-01-2011, 07:07 AM

It works with Mazda, no dealer coding = no go, ask those who have tried to get around it. Panel beaters for instance are finding that after they replace a power steering pump on a Mazda they have to get a dealer to code it also. It surprises me as I said that VW have not gone down this path. Also any one who fiddles with a common rail diesel fuel system had better know what they are doing due to the extremely high fuel rail pressures, it is a job not to be taken lightly. Don't believe it? it's your problem if you get injured.

**benough** · 23-01-2011, 07:32 PM

I had one of my injectors fail under warranty but as far as I know the loom stayed.

Originally Posted by PeDiES

ive gotten a few of these in at work, the problem isn't the loom breaking its the injector shorting out, thats why when it happens the car will not run at all because it shorts the whole circut.

this doesn't damage any of the other injectors or the loom, the main reason (not only reason) vw will change the loom is because the plugs shatter when removing them (sometimes not, no loom required). To replace them you need a tool kit to get them out (which i have) it includes other peices like dial indicator mount so that you can set up the clearances of the rockers.

To sum up, if it happens to your car you can replace just the one injector, ive only seen number 2 fail so far, but ive only done 2 cars.
No doubt the other might fail but i think its worth the $4500 difference to hope for the best.

**jazd** · 23-01-2011, 08:01 PM

So what are the symptoms when an injector fails? Is it catastrophic or does your car just start running on 3 cylinders?

**benough** · 23-01-2011, 08:12 PM

Mine just stopped and wouldn't start again. Zero warning.

Maybe you should get onto that used car warranty Jarred?

**PeDiES** · 24-01-2011, 05:05 PM

Originally Posted by benough

Mine just stopped and wouldn't start again. Zero warning.

Maybe you should get onto that used car warranty Jarred?

most used car warrantys will only cover part cost, hardly worth it

**jazd** · 24-01-2011, 05:45 PM

Originally Posted by PeDiES

most used car warrantys will only cover part cost, hardly worth it

Yep thats why I'm not bothering.. Whats the deal with VW offering exchanges? I would assume its not free, but I think I read somewhere about them selling the refurbished ones?

**PeDiES** · 24-01-2011, 06:52 PM

they will sell you an injector with a core charge which they then return when you return the old injector. The injector cost is there the whole time its just the core charge that comes and goes. My guess is they go back to siemens in mass then the cycle continues