Fuel Injector issue Vento diesel

I am an unlucky owner of Volkswagon Vento disel version.I am using it since last 2.5yrs.It was fine since 2 years .The car has coverd only 25,000km.All on a sudden vehicle started jerking.On contacting VW workshop came to kno tat the FEUL INJECTOR is to be replaced due to dust in the diesel .It cost around 80,000 to 95,000. All the cars use same disel and why does this complaint happen only for vento.I have found a couple of complaints regarding same fuelinjector problem online.KIndly dont purchase this car and land up in trouble.This problem usually happens only after the guarenty period.VW is chosen for its German technology.Maruty alto is far better than this.Pls dont buy this car.Its my humble request.Its the worst car i have ever used.There is no free services.each servise cost around 15,000.