My father in law used to work on the designs of Ford cars and many years ago I mentioned to him that Mk5 Cortinas rusted quicker than the Mk4 ones. He said that when they had a successful car out for a while, the next step was not how they could make it better, but how they could make it cheaper. One thing he said they did with the MK5 was to use thinner steel, hence the rust problem. Maybe the same cost-cutting thing has happened with the Evoque as there seems to be more problems with later ones than earlier ones., most of the earlier 2.2 SD4's were good cars...
I think you need to see the wider picture and consider the whole spectrum of faults and especially not consider only the diesel Ingenium.Quote "Most of the problems with JLR vehicles are electronic issues."
Something has slipped in engineering as well: the Ingenium and its balance shafts being a case in point. A brand new engine designed at a cost of hundreds of millions, then tested over millions of miles should not have systemic bearing failures when it gets into the field. Timing chains? For decades timing chains for DOHC engines have been considered as "lifetime components" of the engine, now Ingenium is throwing up chain failures all over the place. These two mechanical failures are easy to blame on diesel dilution - but that's wrong imho, the oil thins but it doesn't thin by THAT much and in any case a lot of engines now use 0W-20 oils with viscosity down to 5.7 cSt. None of the oil samples tested on the DS forum were lower than 8.0 cSt so something else is going on. Badly spec'd materials? Poor QA? Bad design? Who knows - but this is core engineering, not software.
Erm, my post was merely to suggest that across the whole JLR range it is electrical/software issues that cause the majority of problems for owners.Yes, I am a victim of misrepresentation by a JLR dealership like thousands of others.
Back on topic, how do you explain balance shafts? This is clearly a systemic engineering problem. If it weren't, why does the TSB say that dealers can fit a special part number provided that they get approval from JLR following two balance shaft failures on the same car?
I take it you are aware of this directive