[DMGRS]

Unfortunately a lot of the problems are down to the complexity of the engine and sheer number of ancillaries to go wrong - for example there's not one fuel pump as per the L Series in the 25/45 of the same age, there's 3!
Then you have the daft ECU placement, the daft alternator placement (perfect for oil spills from filter changes) and the fact the PCV filter was missed off the service schedule...

Don't get me wrong, I love my ZT-T - but for me, I don't see the M47R engine as the ever-reliable lump I once did. I've had around 10 75/ZT models with this engine, so it's not a judgement based on something I've read.

At the moment my 'main' car is a 620ti with the T Series Turbo engine, and for all intents and purposes the later T Series can be considered a lot more 'reliable' than the M47R engine. Not much to go wrong, no DMF, one fuel pump... the list goes on. Of course you lose economy - currently around 30MPG with 50/50 town and motorway driving.