A sound comes from the right side of the dash board.
Spare parts are very expensive.
Actually I want to tell the general public that this car, and most of the other cars designed from Japan in Pakistan, are not meant to run on CNG.
That's why most of the people face problems in running of this car in hilly areas.
I recommend to use Petrol instead of CNG in steep hilly areas, and experience the liberation.
Also, if you want to go to top speed, use petrol, and you can go upto 150 km/h.
Use 4th gear instead of 5th to gain top speed, because 5th gear is designed for economy, not for speed.
Generous car with old fashioned carburetor. i have tried my best in fourth gear, but cannot cross 150km/h.