The stories are all the same, the engines wear out quickly in local conditions (150,000-200,000KM is the mileage they crap out at.) Also, usage of normal diesel often causes the check engine light to come on and the engine to lose power, Rebuilding these engines (properly that is) will cost over 500k, and parts are pretty costly as well (So far)
The 3.0L engine is 1KD-FTV, the 2.5L is 2KD FTV
D4D is just a brand name that toyota use on the Common Rail engines. Diesel 4 Cylinder Direct injection