B6 Glow Plugs BKP 4.4v or 7v?

[VWPassatWagon]

Morning all, recently purchased a B6 estate on a 57 plate with the 2.0 TDI 140 BKP engine.

The car is running fine except I occasionally get the check engine light come on, I've checked and cleared it with my mates generic code reader, and it comes up with an issue with glow plug number 2.usually takes a few days to return.

The car needs a service (oil, fuel, cabin & air filters) so was planning to tackle the glow plugs at the same time.

After reading half the internet it seems my car is borderline for when they swapped the glow plugs? Does anyone have a list based on VIN or Engine number that I can refer to?

If not I'll order both from ECP and take back the wrong ones.

Assuming it's best to replace the valve cover gasket at the same time, is there a prefer aftermarket brand? Don't mind paying a little extra if it avoids an oil leal later down the line!

Thanks