I think they didn't discontinued the 1.3 the stock is over in gandhara Nissan and they reduce the price of 1.6 model so people buy it and it sell quickly. Its totally imported not built in Pakistan but the stock is old of that time when nissan re-enter in Pakistan.
anyhow it should b sold like hot piece of cake. But i don't think so b'coz in our country mostly people like to buy Toyota and Honda.
if i am financially able to buy a car. I definitely go for Nissan Sunny.