The old school diesel engines have low pressure Injector Nozzles, these new D4D's have high pressure Injectors.
Our Diesel is very high in Sulfur and damages the Injectors over time. Injectors cost over 40,000-/ I assume.
And, Diesel is mixed with Kerosene, Reet, Bajri and what not in Pakistan. It's hard to find a proper Petrol Pump, let alone a good Diesel fueling station.
It is not feasible for Toyota- They would have to repair/replace them under warranty, meaning loss for Toyota.
There's a 730D near my house, well, when it drives, pollutes like a Tractor. BLACK THICK SMOKE.
I must agree though- Diesel is awesome. This new 1.4 L D4D gives amazing power and Fuel Economy. 88 BHP!!
Plus, the fate of new technology and cars, is in the hands of Mechanics. Customers don't know A-Z and trust their Mechanic, wan handred parcant. If Mechy says it's a fail, the word will spread like fire in dry grass. Voila, D4D is a fail.
Here are some nice topics for you to read:);
https://www.pakwheels.com/forums/engine-transmission-powertrain/71709-d4d-diesel-engine
https://www.pakwheels.com/forums/performance-modification-tune-up-preventive-maintenance/160710-how-solve-d4d-other-common-rail-diesel-engine-probems